CN118109094A - Two-in-one water paint for aluminum alloy parts and spraying process thereof - Google Patents
Two-in-one water paint for aluminum alloy parts and spraying process thereof Download PDFInfo
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- CN118109094A CN118109094A CN202410064729.9A CN202410064729A CN118109094A CN 118109094 A CN118109094 A CN 118109094A CN 202410064729 A CN202410064729 A CN 202410064729A CN 118109094 A CN118109094 A CN 118109094A
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- Prior art keywords
- aluminum alloy
- parts
- water paint
- paint
- water
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- 239000003973 paint Substances 0.000 title claims abstract description 117
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 74
- 238000005507 spraying Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 43
- 239000002966 varnish Substances 0.000 claims abstract description 56
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- 239000003921 oil Substances 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000001962 electrophoresis Methods 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 230000008719 thickening Effects 0.000 claims abstract description 6
- 238000004040 coloring Methods 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims abstract description 5
- 239000000049 pigment Substances 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000003085 diluting agent Substances 0.000 claims abstract description 4
- 238000007665 sagging Methods 0.000 claims abstract description 4
- 230000002265 prevention Effects 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims description 26
- 239000004925 Acrylic resin Substances 0.000 claims description 22
- 229920000178 Acrylic resin Polymers 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 18
- 101100518161 Arabidopsis thaliana DIN4 gene Proteins 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- IBLKWZIFZMJLFL-UHFFFAOYSA-N 1-phenoxypropan-2-ol Chemical compound CC(O)COC1=CC=CC=C1 IBLKWZIFZMJLFL-UHFFFAOYSA-N 0.000 claims description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- -1 dodecyl alcohol ester Chemical class 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N ethyl butylhexanol Natural products CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- POAOYUHQDCAZBD-IDEBNGHGSA-N 2-butoxyethanol Chemical group [13CH3][13CH2][13CH2][13CH2]O[13CH2][13CH2]O POAOYUHQDCAZBD-IDEBNGHGSA-N 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000012031 short term test Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 28
- 238000012360 testing method Methods 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 14
- 238000005238 degreasing Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 10
- 229910000077 silane Inorganic materials 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 238000005554 pickling Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- GDXHBFHOEYVPED-UHFFFAOYSA-N 1-(2-butoxyethoxy)butane Chemical compound CCCCOCCOCCCC GDXHBFHOEYVPED-UHFFFAOYSA-N 0.000 description 2
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical compound COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 235000011054 acetic acid Nutrition 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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- 238000004381 surface treatment Methods 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
- B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of aluminum alloy coatings, and relates to a two-in-one water-based paint for aluminum alloy parts and a spraying process thereof. The two-in-one water paint is prepared from the following raw materials in parts by weight: 10 to 20 parts of base resin, 0.1 to 10 parts of solvent, 1 to 20 parts of coloring pigment and filler, 30 to 70 parts of diluent, 1 to 10 parts of thickening and sagging prevention auxiliary agent and 1 to 10 parts of film forming auxiliary agent. The spraying process comprises the following steps: the aluminum alloy part is pretreated, then an electrophoresis layer is formed on the aluminum alloy part, and then two-in-one water paint and oil varnish are sprayed to form a double-layer paint coating. The automobile aluminum alloy part in the spraying process can obtain beautiful and bright, corrosion-resistant and impact-resistant surfaces through the two-in-one water paint and the oil varnish spraying, and can meet the requirements of various long-term and short-term tests, thereby having positive and profound effects on the development and wide application of aluminum alloy coated parts.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy coatings, and relates to a two-in-one water-based paint for aluminum alloy parts and a spraying process thereof.
Background
The aluminum alloy coating technology is to uniformly disperse the coating on the surface of a workpiece, so that a uniform, compact and uniform-color coating can be formed. At present, the automotive coating industry in China mainly uses a three-spraying three-baking technology, namely a primer-color paint-varnish mode. It was found that the final coating appearance was very much related to the appearance of each layer, requiring cumbersome control of the appearance effect of each layer during the spraying process, otherwise the product surface would have a severe orange peel or sagging appearance. The existing water paint spraying process has the problems of severe construction requirements and poor appearance effect, and the three steps of spraying of primer, colored paint and varnish are performed, then the curing treatment is performed, the number of sprayed coating layers is large, the product qualification rate can be reduced, the cost and the energy consumption are increased, and the appearance aesthetic degree can be influenced.
If the binding force and chromatic aberration between the primer and the electrophoresis layer are ensured to be unchanged, two layers of water paint of the primer and the water paint are combined into a single layer of water paint, and three spraying and three baking are changed into two spraying and two baking, so that the cost and energy consumption of the paint can be greatly reduced, the orange peel effect of the product appearance can be improved, the VOC emission in the original spraying mode can be reduced, the paint is friendly to human bodies and the environment, the occupational health and safety of production operation are ensured, and the paint is an environment-friendly encouraging development direction in China.
Disclosure of Invention
Aiming at the problems of aluminum alloy surface treatment in the prior art, the invention provides two-in-one water paint for aluminum alloy parts and a spraying process thereof, and solves the adverse effect brought by the traditional three-spraying and three-drying spraying mode of the aluminum alloy parts.
One object of the invention is achieved by the following technical scheme:
The two-in-one water paint for the aluminum alloy parts is prepared from the following raw materials in parts by weight: 10 to 20 parts of base resin, 0.1 to 10 parts of solvent, 1 to 20 parts of coloring pigment and filler, 30 to 70 parts of diluent, 1 to 10 parts of thickening and sagging prevention auxiliary agent and 1 to 10 parts of film forming auxiliary agent.
The two-in-one water paint has the properties of original primer and color paint, and the combination of the two-in-one water paint and the varnish can ensure that the binding force and color difference of the surface coating of the aluminum alloy part are kept unchanged.
Preferably, the base resin is an aqueous acrylic resin.
Further preferably, the aqueous acrylic resin is an acrylic resin emulsion, an acrylic resin aqueous dispersion or an acrylic resin aqueous solution.
Preferably, the solid content of the aqueous acrylic resin is 10 to 60wt%.
Preferably, the solvent comprises one or more of 2-butoxyethanol, toluene, dimethylformamide, glycol ether, ethylbenzene, xylene and dimethyl sulfoxide, and more preferably 2-butoxyethanol.
Preferably, the coloring pigment filler consists of the following components: 0.1 to 10 parts of carbon black and 5 to 20 parts of titanium dioxide.
Preferably, the diluent is water, more preferably deionized water.
Preferably, the thickening and sagging-preventing auxiliary agent comprises one or more of bentonite, silicon dioxide and paraffin wax, and further preferably bentonite.
Preferably, the film forming aid comprises one or more of diethylene glycol butyl ether, dodecyl alcohol ester, propylene glycol butyl ether and propylene glycol phenyl ether, and further preferably diethylene glycol butyl ether.
Another object of the invention is achieved by the following technical solutions:
A spray process of a two-in-one water paint for aluminum alloy parts, the spray process comprising the steps of: the aluminum alloy part is pretreated, then an electrophoresis layer is formed on the aluminum alloy part, and then two-in-one water paint and oil varnish are sprayed to form a double-layer paint coating.
The pretreatment of the aluminum alloy part comprises the following steps: and clamping the aluminum alloy parts by using a hanger, performing ultrasonic degreasing, washing and pickling on the aluminum alloy parts, and then performing silane spraying treatment.
Preferably, the ultrasonic degreasing process adopts a Kemmett's 5166 degreasing process, and the degreasing liquid in the ultrasonic degreasing process comprises 5-15wt% of dipropylene glycol methyl ether, 5-15wt% of potassium carbonate, 5-20wt% of potassium hydroxide, 5-20wt% of potassium pyrophosphate and the balance of water.
Preferably, the ultrasonic current is 2-4A for 3-10 min.
Preferably, a Kemmett's 4325 system is adopted as the pickling solution in the pickling process, wherein the pickling solution comprises 5-30wt% of sulfuric acid, 5-30wt% of hydrofluoric acid and the balance of water.
Preferably, a Kemmett' 9832 system is adopted as the silane spray liquid in the silane spray process, and the silane spray liquid comprises 1-15 wt% of methanol, 1-15 wt% of nitric acid, 1-15 wt% of fluorozirconic acid, 1-15 wt% of manganese nitrate and 0.1-1 wt% of silane.
The formation of the aluminum alloy part electrophoresis layer comprises the following steps: and taking the pretreated aluminum alloy part as a cathode, performing electrophoresis treatment in an organic solution to obtain a layer of organic coating on the surface of the aluminum alloy part, and performing high-temperature curing after UF water washing.
The UF water washing is ultrafiltration membrane filtration and purification treatment, and the ultrafiltration membrane has a screening function and can play a role in filtration.
Preferably, the organic solution is modified epoxy resin/polyurethane, black color paste, organic acid and organic solvent. Further preferably, the organic acid comprises one or more of acetic acid, formic acid, acetic acid, and lactic acid. The organic solvent comprises one or more of ethylene glycol dibutyl ether, ethylene glycol, dimethylformamide, ethylene glycol monomethyl ether and butanol.
Preferably, the high-temperature curing temperature is 180-200 ℃ and the time is 30-50 min.
The double-layer paint coating formation comprises the following steps: and (3) spraying the aluminum alloy part with the electrophoretic layer by using two-in-one water paint, and after curing, spraying oily varnish, and curing to form the double-layer paint coating with excellent performance.
Preferably, the voltage is 30-50 KV, the external molding compressed air is 300-500L/min, the internal molding compressed air is 150-350L/min, and the flow is 150-350L/min in the spraying process of the two-in-one water paint.
Preferably, the two-in-one water paint is sprayed after being diluted by water, wherein the mass ratio of the two-in-one water paint to the water is 100: (6-9) viscosity of 20-24 s/DIN 4/20deg.C, which means that the two-in-one aqueous paint has an outflow time of 20s to 24s in DIN4 viscosity cups at 20deg.C.
Preferably, the curing temperature of the two-in-one water paint after spraying is 75-85 ℃ and the time is 30-50 min.
Preferably, the voltage is 30-50 KV, the external molding compressed air is 300-500L/min, the internal molding compressed air is 150-350L/min, and the flow is 250-450L/min in the oil varnish spraying process.
Preferably, the oil varnish is sprayed after being diluted by a solvent, wherein the mass ratio of the oil varnish to the solvent is 100: (35-45) viscosity of 20-25 s/DIN 4/20deg.C, which means that the flow-out time of the oil varnish in DIN4 viscosity cup is 20s to 25s at 20deg.C.
Preferably, the solvent includes one or both of n-butyl acetate and ethyl acetate.
Preferably, the curing temperature of the oil varnish after spraying is 130-150 ℃ and the time is 30-50 min.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention provides a two-in-one water paint for aluminum alloy parts, which can greatly reduce paint cost and energy consumption and can also solve the problem of difficult application of the water paint on an aluminum alloy part matrix of an automobile, such as poor orange peel appearance and the like.
2. According to the invention, the two-in-one water paint of the two layers of the primer color paint is changed into the single-layer water paint, and the three-spraying three-drying process is changed into the two-spraying two-drying process.
3. The automobile aluminum alloy part in the spraying process can obtain beautiful and bright, corrosion-resistant and impact-resistant surfaces through the two-in-one water paint and the oil varnish spraying, and can meet the requirements of various long-term and short-term tests, thereby having positive and profound effects on the development and wide application of aluminum alloy coated parts.
Detailed Description
The technical solution of the present application will be further described with reference to the following specific embodiments, and it should be understood that the specific embodiments described herein are only for illustrating the present application, and are not intended to limit the scope of the present application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
Example 1
The two-in-one water paint for the aluminum alloy parts is prepared from the following raw materials in parts by weight: 12 parts of acrylic resin aqueous solution, 1 part of 2-butoxyethanol, 2 parts of carbon black, 13.8 parts of titanium dioxide, 63 parts of deionized water, 3 parts of bentonite and 5 parts of diethylene glycol butyl ether.
Wherein the acrylic resin aqueous solution is prepared by the following method: adding 20 parts by weight of deionized water and 20 parts by weight of solid acrylic resin into a reaction kettle, heating to 70 ℃, continuously dropwise adding monoethanolamine while stirring, keeping the pH value of the solution at 8.5 until the solid acrylic resin is completely dissolved, and cooling to obtain an acrylic resin aqueous solution; the solid content of the acrylic resin aqueous solution was 45wt%.
The spraying process of the two-in-one water paint for the aluminum alloy parts comprises the following steps of:
(1) Clamping aluminum alloy parts by using a hanger, placing the aluminum alloy parts in degreasing liquid, degreasing for 8min under ultrasonic power current 3A, wherein the ultrasonic degreasing process adopts a Kemmett's 5166 degreasing process, and the degreasing liquid comprises 10wt% of dipropylene glycol methyl ether, 10wt% of potassium carbonate, 15wt% of potassium hydroxide, 15wt% of potassium pyrophosphate and the balance of water; washing with water after ultrasonic degreasing, and then washing with acid for 3min, wherein a Kemmett's 4325 system is adopted as a pickling solution, and the pickling solution comprises 25wt% of sulfuric acid, 25wt% of hydrofluoric acid and the balance of water; carrying out silane spraying treatment after water washing again, wherein a Kemmett's 9832 system is adopted as a silane spraying liquid, and the silane spraying liquid comprises 8wt% of methanol, 7wt% of nitric acid, 8wt% of fluorozirconic acid, 10wt% of manganese nitrate and 0.5wt% of silane;
(2) Taking an aluminum alloy part as a cathode after silane spraying treatment, taking SUS316 as an anode, carrying out electrophoresis treatment in an electrophoresis solution with a main component of modified epoxy resin/polyurethane, black color paste, acetic acid and ethylene glycol dibutyl ether, wherein the cathode electrophoresis time is 200s, and curing at a high temperature of 195 ℃ for 40min after UF water washing;
(3) Spraying two-in-one water paint on the surface of an aluminum alloy part, wherein the voltage is 30KV, the external molding compressed air is 300L/min, the internal molding compressed air is 150L/min, the flow rate of the two-in-one water paint is 150L/min, and the mass ratio of the two-in-one water paint to water is 100:7, the viscosity of the two-in-one water paint is 20s/DIN4/20 ℃, and the two-in-one water paint is cured for 30min at 75 ℃ after being sprayed;
(4) Oil varnish (PPG, brand is MS-HTC 2000) spraying is carried out on the surface of the aluminum alloy part, the spinning cup adopts 10086_ABB specification of ABB, the voltage is 30KV, the external molding compressed air is 300L/min, the internal molding compressed air is 150L/min, the varnish flow is 250L/min, and the mass ratio of the varnish to the solvent ethyl acetate is 100:35, the varnish viscosity is 20s/DIN4/20 ℃, and the varnish is cured for 30min at 130 ℃ after spraying to form a double-layer varnish coating.
The thickness of the two-in-one water paint film in the double-layer paint coating obtained in the embodiment is 13 mu m; the thickness of the oily varnish was 35. Mu.m.
Example 2
Example 2 differs from example 1 only in that example 2 adjusts the spray parameters of the two-in-one aqueous paint and varnish in the spray process. The two-in-one water paint raw material for the aluminum alloy parts in this embodiment is the same as that in embodiment 1.
The spraying process of the two-in-one water paint for the aluminum alloy parts comprises the following steps of:
(1) The pretreatment of the aluminum alloy parts and the formation of the electrophoretic layer were the same as in example 1;
(2) Spraying two-in-one water paint on the surface of an aluminum alloy part, wherein the voltage is 50KV, the external molding compressed air is 500L/min, the internal molding compressed air is 350L/min, the flow rate of the two-in-one water paint is 350L/min, and the mass ratio of the two-in-one water paint to water is 100:9, the viscosity of the two-in-one water paint is 24s/DIN4/20 ℃, and the two-in-one water paint is cured for 50min at 85 ℃ after being sprayed;
(3) Carrying out varnish spraying on the surface of an aluminum alloy part, wherein the voltage is 50KV, the external molding compressed air is 500L/min, the internal molding compressed air is 350L/min, the varnish flow is 450L/min, and the mass ratio of the varnish to the solvent is 100:45, the varnish viscosity is 25s/DIN4/20 ℃, and after spraying, the varnish is cured for 50min at 150 ℃ to form a double-layer varnish coating.
The thickness of the two-in-one water paint film in the double-layer paint coating obtained in the embodiment is 12 mu m; the thickness of the oily varnish was 34. Mu.m.
Example 3
Example 3 differs from example 1 only in that example 3 adjusts the spray parameters of the two-in-one aqueous paint and varnish in the spray process. The two-in-one water paint raw material for the aluminum alloy parts in this embodiment is the same as that in embodiment 1.
The spraying process of the two-in-one water paint for the aluminum alloy parts comprises the following steps of:
(1) The pretreatment of the aluminum alloy parts and the formation of the electrophoretic layer were the same as in example 1;
(2) Spraying two-in-one water paint on the surface of an aluminum alloy part, wherein the voltage is 40KV, the external molding compressed air is 400L/min, the internal molding compressed air is 250L/min, the flow rate of the two-in-one water paint is 250L/min, and the mass ratio of the two-in-one water paint to water is 100:8, the viscosity of the two-in-one water paint is 22s/DIN4/20 ℃, and the two-in-one water paint is cured for 40min at 80 ℃ after being sprayed;
(3) Carrying out varnish spraying on the surface of an aluminum alloy part, wherein the voltage is 40KV, the external molding compressed air is 400L/min, the internal molding compressed air is 250L/min, the varnish flow is 350L/min, and the mass ratio of the varnish to the solvent is 100:40, the varnish viscosity is 22s/DIN4/20 ℃, and the varnish is cured for 40min at 140 ℃ after spraying to form a double-layer varnish coating.
The thickness of the two-in-one water paint film in the double-layer paint coating obtained in the embodiment is 15 mu m; the thickness of the oily varnish was 38. Mu.m.
Example 4
Example 4 differs from example 1 only in that example 4 has been modified with two-in-one water paint raw materials.
The two-in-one water paint for the aluminum alloy parts is prepared from the following raw materials in parts by weight: 12 parts of acrylic resin aqueous solution, 1 part of toluene, 2 parts of carbon black, 13.8 parts of titanium dioxide, 63 parts of deionized water, 3 parts of paraffin wax and 5 parts of propylene glycol butyl ether, wherein the preparation method of the acrylic resin aqueous solution is the same as in example 1.
The spraying process of the two-in-one water paint for aluminum alloy parts is the same as in example 1.
The thickness of the two-in-one water paint film in the double-layer paint coating obtained in the embodiment is 13 mu m; the thickness of the oily varnish was 35. Mu.m.
Comparative example 1
Comparative example 1 differs from example 1 only in that comparative example 1 uses a conventional three-spray three-bake spray process, i.e., the surface of the aluminum alloy part is sequentially subjected to primer spray, paint spray, and varnish spray in the spray step.
The traditional three-spraying and three-baking spraying process comprises the following steps of:
(1) The pretreatment of the aluminum alloy parts and the formation of the electrophoretic layer were the same as in example 1;
(2) Spraying a primer (PPG, brand WLF 128002-H) on the surface of an aluminum alloy part, wherein a rotary cup_4N 10091ABB of ABB is adopted, the voltage is 30KV, the external molding compressed air is 300L/min, the internal molding compressed air is 150L/min, the primer flow is 150L/min, and the mass ratio of the primer to water is 100:7, the viscosity of the primer is 20s/DIN4/20 ℃, and the primer is cured for 30min at 75 ℃ after being sprayed;
(3) Spraying color paint (PPG, brand WLF 128003) on the surface of an aluminum alloy part, adopting a rotary cup_4N 10091ABB of ABB, wherein the voltage is 20KV, the external molding compressed air is 300L/min, the internal molding compressed air is 100L/min, the flow rate of the color paint is 80L/min, and the mass ratio of the color paint to water is 100:2, the viscosity of the colored paint is 16s/DIN4/20 ℃, and the colored paint is cured for 10min at 80 ℃ after being sprayed;
(4) Oil varnish (PPG, brand MS-HTC 2000) spraying is carried out on the surface of the aluminum alloy part, a rotary cup 10086_ABB of ABB is adopted, the voltage is 30KV, the external molding compressed air is 300L/min, the internal molding compressed air is 150L/min, the varnish flow is 250L/min, and the mass ratio of varnish to solvent ethyl acetate is 100:35, the varnish viscosity is20 s/DIN4/20 ℃, and after spraying, the varnish is cured for 30min at 130 ℃ to form a double-layer varnish coating, and a three-layer varnish coating is formed.
The thickness of the primer film in the three-layer paint coating obtained in the comparative example is 13 mu m; the thickness of the colored paint film is 11 mu m; the thickness of the oily varnish was 35. Mu.m.
Comparative example 2
Comparative example 2 differs from example 1 only in that comparative example 2 adjusts the parts by weight of the two-in-one aqueous paint raw materials.
The two-in-one water paint for the aluminum alloy parts is prepared from the following raw materials in parts by weight: 22 parts of acrylic resin aqueous solution, 15 parts of 2-butoxyethanol, 8 parts of carbon black, 18 parts of titanium pigment, 24 parts of deionized water, 5 parts of bentonite and 8 parts of diethylene glycol butyl ether, wherein the preparation method of the acrylic resin aqueous solution is the same as in example 1.
The spraying process of the two-in-one water paint for aluminum alloy parts is the same as in example 1.
The thickness of the two-in-one water paint film in the double-layer paint coating obtained in the comparative example is 13 mu m; the thickness of the oily varnish was 35. Mu.m.
The surface-treated aluminum alloy parts of examples 1 to 4 and comparative examples 1 to 2 were subjected to adhesion test, chipping resistance test, corrosion resistance test, color difference test, and the test result data are shown in tables 1 to 2.
Wherein the adhesion test is in accordance with standard ISO2409:2020 and MBN 10494:2021-035.5, the adhesion of the coating of the aluminum alloy parts was tested by the tape method, the tape was Tesa4657 type tape, and the transverse distance was 2mm.
The macadam impact resistance test is carried out according to the standard MBN 10494-5:2021-035.3 and ISO20567-1:2017 And (E) performing multiple broken stone impact test on the method B, wherein the grain size of the cold iron sand is 3.55-5.00 mm, and the pressure is as follows: 2bar, iron sand feed rate: 10 seconds, test atmosphere: meets DIN EN 23270.
The corrosion resistance test is carried out according to the CASS test of standard MBN 10494-6:2021-035.4, the test duration is 240h, the temperature is 50+/-2 ℃, and the horizontal collection area is 80cm 2: 1.5+/-0.5 mL/h of average collection rate, 50+/-5 g/L of sodium chloride concentration, and pH value of the collection solution: 3.1 to 3.3.
Color difference test was performed according to standard MBN 10476: visual color assessment and Standard MBN 10473-1 of 2019-12: the colorimetric method of 2019-12 is used for testing.
TABLE 1 adhesion, chip impact resistance, and Corrosion resistance test results for examples and comparative examples
The adhesive force of the traditional three-spraying and three-baking spraying process, namely the primer, the colored paint and the varnish spraying process, and the qualified standard range of the broken stone impact resistance test are as follows:
Adhesion test: gt 1 is not more than;
And (3) stone impact resistance test: overall injury rating: and the level is less than or equal to 2.
Table 2 color difference test results for each of examples and comparative examples
The standard range of qualification of the color difference test of the traditional three-spraying and three-baking spraying process, namely the primer, the colored paint and the varnish spraying process is as follows:
visual color evaluation: ranges up to and including + -1.5;
△L*(45°)：-1.0≤△L≤0.5；
△a*(45°)：-0.3≤△a≤0.2；
△b*(45°)：-0.5≤△b≤0.2，
wherein Δl, Δa, Δb are the differences between the lightness L and the chromaticity index a, b between the reference sample and the sample under test.
As shown in tables 1 and 2, it can be seen from examples 1 to 3 and comparative example 1 that the two-in-one aqueous paint for aluminum alloy parts provided by the present invention has adhesion, chipping resistance, corrosion resistance, and color difference test data within the standard range of the conventional spray coating process. Compared with the traditional two-layer water paint of the primer color paint, the two-in-one water paint of the invention has the advantages that the binding force with the electrophoresis layer is still good on the basis of greatly reducing the paint cost and the energy consumption, the excellent adhesive force, the broken stone impact resistance and the corrosion resistance are ensured, and the color difference is kept unchanged.
From examples 1 to 4, it can be seen that the two-in-one water paint processed by using the preferred raw materials within the technical scope of the invention has the advantages that the adhesion, the broken stone impact resistance, the corrosion resistance and the color difference test data can all reach the acceptable level, and the effect is excellent; in example 4, the adhesion and color difference test data were not good for the two-in-one aqueous paint prepared by processing the non-preferred materials within the technical scope of the present invention.
From examples 1 to 3 and comparative example 2, it can be seen that the two-in-one water paint processed by using the raw materials in parts by weight within the technical scope of the invention has the adhesion, the broken stone impact resistance, the corrosion resistance and the color difference test data which all reach the acceptable level; in comparative example 2, the two-in-one water paint processed by the raw materials in parts by weight exceeding the technical range of the invention has very poor adhesion and color difference test data results, and cannot reach the acceptable level.
In conclusion, the automobile aluminum alloy part in the spraying process can obtain attractive, beautiful, corrosion-resistant and impact-resistant surfaces through the two-in-one water paint and the oil varnish, and can meet the requirements of various long-term and short-term tests, so that the development and wide application of aluminum alloy coated parts are positively and profoundly influenced.
The various aspects, embodiments, features of the invention are to be considered as illustrative in all respects and not restrictive, the scope of the invention being indicated only by the appended claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.
In the preparation method of the invention, the sequence of each step is not limited to the listed sequence, and the sequential change of each step is also within the protection scope of the invention without the inventive labor for the person skilled in the art. Furthermore, two or more steps or actions may be performed simultaneously.
Finally, it should be noted that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention's embodiments. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner, and need not and cannot fully practice all of the embodiments. While these obvious variations and modifications, which come within the spirit of the invention, are within the scope of the invention, they are to be construed as being without departing from the spirit of the invention.
Claims (10)
1. The two-in-one water paint for the aluminum alloy parts is characterized by being prepared from the following raw materials in parts by weight: 10 to 20 parts of base resin, 0.1 to 10 parts of solvent, 1to 20 parts of coloring pigment and filler, 30 to 70 parts of diluent, 1to 10 parts of thickening and sagging prevention auxiliary agent and 1to 10 parts of film forming auxiliary agent.
2. The two-in-one water paint for aluminum alloy parts according to claim 1, wherein the base resin is an aqueous acrylic resin.
3. The two-in-one water paint for aluminum alloy parts according to claim 2, wherein the water-based acrylic resin is an acrylic resin emulsion, an acrylic resin aqueous dispersion or an acrylic resin aqueous solution.
4. The two-in-one water paint for aluminum alloy parts according to claim 2, wherein the solid content of the water-based acrylic resin is 10-60 wt%.
5. The two-in-one water paint for aluminum alloy parts according to claim 1, wherein the solvent comprises one or more of 2-butoxyethanol, toluene, dimethylformamide, glycol ether, ethylbenzene, xylene, and dimethyl sulfoxide;
The coloring pigment filler consists of the following components: 0.1 to 10 parts of carbon black and 5 to 20 parts of titanium dioxide;
the thickening and sagging-preventing auxiliary agent comprises one or more of bentonite, silicon dioxide and paraffin;
The film forming aid comprises one or more of diethylene glycol butyl ether, dodecyl alcohol ester, propylene glycol butyl ether and propylene glycol phenyl ether.
6. The two-in-one water paint for aluminum alloy parts according to claim 1, wherein the solvent is 2-butoxyethanol;
the thickening and sagging-preventing auxiliary agent is bentonite;
The film forming aid is diethylene glycol butyl ether.
7. A spray process of a two-in-one water paint for aluminum alloy parts according to any one of claims 1 to 6, characterized in that the spray process comprises the steps of: the aluminum alloy part is pretreated, then an electrophoresis layer is formed on the aluminum alloy part, and then two-in-one water paint and oil varnish are sprayed to form a double-layer paint coating.
8. The spray process of two-in-one water paint for aluminum alloy parts according to claim 7, wherein the double-layer paint coating formation comprises the steps of: and spraying the aluminum alloy part with the electrophoretic layer by using two-in-one water paint, and after curing, spraying oily varnish, and curing to form a double-layer paint coating.
9. The spraying process of the two-in-one water paint for the aluminum alloy parts, which is characterized in that the voltage is 30-50 KV in the spraying process of the two-in-one water paint, the external molding compressed air is 300-500L/min, the internal molding compressed air is 150-350L/min, and the flow is 150-350L/min;
the two-in-one water paint is sprayed after being diluted by water, wherein the mass ratio of the two-in-one water paint to the water is 100: (6-9), the viscosity is 20-24 s/DIN4/20 ℃;
the curing temperature of the two-in-one water paint after spraying is 75-85 ℃ and the time is 30-50 min.
10. The spraying process of the two-in-one water paint for the aluminum alloy parts, which is characterized in that the voltage in the spraying process of the oily varnish is 30-50 KV, the external molding compressed air is 300-500L/min, the internal molding compressed air is 150-350L/min, and the flow is 250-450L/min;
The oil varnish is sprayed after being diluted by a solvent, wherein the mass ratio of the oil varnish to the solvent is 100: (35-45), the viscosity is 20-25 s/DIN4/20 ℃;
The solidifying temperature of the oil varnish after spraying is 130-150 ℃ and the time is 30-50 min.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003251273A (en) * | 2002-02-28 | 2003-09-09 | Kansai Paint Co Ltd | Method of coating automobile car body |
| US20060276589A1 (en) * | 2003-04-24 | 2006-12-07 | Atsuya Kato | Thermosetting liquid coating composition for aluminum wheel and method of coating aluminum wheel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003251273A (en) * | 2002-02-28 | 2003-09-09 | Kansai Paint Co Ltd | Method of coating automobile car body |
| US20060276589A1 (en) * | 2003-04-24 | 2006-12-07 | Atsuya Kato | Thermosetting liquid coating composition for aluminum wheel and method of coating aluminum wheel |
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