CN102838929B - Nano-modification chromium-free zinc-aluminium coating and preparation method thereof - Google Patents
Nano-modification chromium-free zinc-aluminium coating and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 69
- 239000011248 coating agent Substances 0.000 title claims abstract description 67
- 238000012986 modification Methods 0.000 title claims abstract description 18
- 229910000611 Zinc aluminium Inorganic materials 0.000 title claims abstract description 17
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 229920001721 polyimide Polymers 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000009719 polyimide resin Substances 0.000 claims abstract description 18
- 229920001213 Polysorbate 20 Polymers 0.000 claims abstract description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000007822 coupling agent Substances 0.000 claims abstract description 15
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 claims abstract description 15
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 claims abstract description 15
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 25
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 20
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 claims description 16
- 230000004048 modification Effects 0.000 claims description 16
- 239000013530 defoamer Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 7
- -1 pyromellitic acid acid anhydride Chemical class 0.000 claims description 7
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellityc acid Natural products OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 claims description 7
- 239000004642 Polyimide Substances 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 16
- 230000007797 corrosion Effects 0.000 abstract description 16
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 239000010962 carbon steel Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 description 14
- 239000011651 chromium Substances 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 239000002105 nanoparticle Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
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- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
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- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000002103 nanocoating Substances 0.000 description 1
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- 231100000614 poison Toxicity 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a nano-modification chromium-free zinc-aluminium coating and a preparation method thereof, and belongs to the technical field of metal surface anticorrosion coating. Components and mass percentages of the coating are as follows: 46-58 wt% of zinc-aluminium powder, 30-43 wt % of polyimide resin, 1-2 wt% of a titanate coupling agent, 6-9 wt% of Tween-20, 0.6-1 wt% of nano-SiO2, 0.8-1 wt% of nano-Al2O23 and 0.6-1 wt% of a defoaming agent. The coating provided by the invention has excellent performances of corrosion resistance and high hardness, is environment-friendly, has low cost, can provide relatively good protection for carbon steel substrates, and increases application value thereof.
Description
Technical field
The invention belongs to metallic surface protective system technical field, be specifically related to a kind of nano modification chromium-free zinc aluminum coating and preparation method thereof.
Background technology
Aluminum Coating (Dacromet/steel) is a kind of coating with Corrosion Protection, this treatment technology is compared with the traditional technique such as electro-galvanizing, galvanizing, have that environmental pollution is little, barrier propterty good, without hydrogen embrittlement, the feature such as high temperature resistant, but the sexavalent chrome that Aluminum Coating exists has stronger toxicity, its harm people's to biology and environment attention.
In order to meet the VOC regulation of countries in the world and the environmental requirement that automobile industry specifies, Non-chromium Zn-al Coating is widely accepted gradually as the substitute of Dacroment, Non-chromium Zn-al Coating has the feature similar to Dacromet/steel, and not containing poisonous metal and sexavalent chrome or trivalent chromium, realize cleaner production, Non-chromium Zn-al Coating formula is carried out to large quantity research both at home and abroad, as patent " a kind of chromium-free zinc aluminum anticorrosive paint and preparation method thereof " replaces chromic anhydride with organo silane coupling agent, and select acrylic resin, the resin of more than one in epoxy resin and resol adds and in coating, improves coating property, patent " using the oxide compound of molybdenum as corrosion inhibitor and the coating that contains this inhibitor " is pointed out: can replace chromic anhydride as corrosion inhibitor with the oxide compound of molybdenum, the content of the oxide compound of molybdenum in coating should be between 0.5 ~ 7%, be preferably 2%, in oxide compound, molybdenum content should be more than 60%.Although avoided the pollution of chromium, hardness and solidity to corrosion all decline to some extent in Dacromet/steel.
Nanoparticle joins in top coat, there is significant effect for the improvement of coating performance, nanoparticle can improve wear resisting property and the hardness of coating, and keep higher toughness, the most important thing is further to improve the corrosion prevention ability of coating to matrix, in document " impact of silica nanoparticles on Dacromet/steel performance ", its dacro solution is by flake zinc, aluminium powder, reductive agent polyvalent alcohol, dispersion agent emulsification, the silver gray soup compound of the composition such as defoamer, with chromic acid, the orange-yellow liquid that additive and water are formulated and the mixing of polynary Natvosol make, add wherein nanometer SiO
2the hardness of rear coating has improved about 1H, wear resistance and erosion resistance improve, and document " formula and the performance study of steel surface nano aqueous Aluminum Coating " proposes in Non-chromium Zn-al Coating, to add respectively nanometer SiO to being mixed by metal powder, ethylene glycol, OP-emulsifying agent, Sodium orthomolybdate, silane and Natvosol to make
2with nanometer Al
2o
3after, the hardness of coating has improved respectively 8% and 10%, has reached 136HV and 157HV, and nano coating corrodes (1000h) surface after 40 days and all do not occur red rust in neutral salt spray, only have a small amount of white rust to generate, its resisting salt fog corrosion time more not the coating of plus nano particulate improved 280h.Although nanoparticle can improve coating hardness and solidity to corrosion, coating hardness still has gap compared with Dacromet/steel.
Therefore, need to keep under pollution-free prerequisite, hardness is high, corrosion resisting property too excellent coating give plain steel protection.
Summary of the invention
The object of this invention is to provide a kind of solidity to corrosion high, and keep the no-pollution metal protective system of high rigidity.
A kind of nano modification chromium-free zinc aluminum coating, is characterized in that the each component of coating and quality percentage composition thereof are as follows: aluminum zinc powder: 46 ~ 58wt%, polyimide resin: 30 ~ 43wt%, titanate coupling agent: 1 ~ 2wt%, tween 20: 6 ~ 9wt%, nanometer SiO
2: 0.6 ~ 1wt%, nanometer Al
2o
3: 0.8 ~ 1wt%, defoamer: 0.6 ~ 1wt%.Wherein, aluminum zinc powder is flakey, and its mean particle size is 20 ~ 40 microns; Polyimide resin is after being mixed with the ratio of 1:1.08 by 4,4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride, then mixes obtained with dimethyl formamide with the mass ratio of 1:8.
The quality percentage composition of the each component of described nano modification chromium-free zinc aluminum coating preferred version is: aluminum zinc powder: 50wt%, polyimide resin: 39wt%, titanate coupling agent: 1.5wt%, tween 20: 7wt%, nanometer SiO
2: 0.9wt%, nanometer Al
2o
3: 0.9wt%, defoamer: 0.7wt%.
The preparation method of described nano modification chromium-free zinc aluminum coating comprises the following steps: step 1: by 4, after 4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride mix with the ratio of 1:1.08, at room temperature stir, revolution is 120 ~ 160 revs/min, and then adding dimethyl formamide in solution, the mass ratio of solution and dimethyl formamide is 1:8, continues to continue constant temperature and stirs 8 ~ 12h, leave standstill after 24h, make polyimide resin; Step 2: back up by following quality percentage composition: aluminum zinc powder: 46 ~ 58wt%, polyimide resin: 30 ~ 43wt%, titanate coupling agent: 1 ~ 2wt%, tween 20: 6 ~ 9wt%, nanometer SiO
2: 0.6 ~ 1wt%, nanometer Al
2o
3: 0.8 ~ 1wt%, defoamer: 0.6 ~ 1wt%; Step 3: titanate coupling agent and tween 20 are joined in polyimide solution successively, stir until solution is faint yellow thick under room temperature, then add aluminum zinc powder and defoamer, continue to stir 30 ~ 60min; Step 4: by nanometer SiO
2with nanometer Al
2o
3after ultrasonic dispersion 10 ~ 30min, add in the solution configuring by step 3, continue fully to stir 1 ~ 2h, finally obtain nano modification chromium-free zinc aluminum coating.
The invention has the beneficial effects as follows: 1. the nanometer SiO adding in the present invention
2its water delivery group can with polyimide resin in alkoxyl group generation condensation reaction, thereby strengthen the compactness of coating, filled the microscopic void of coating, also improved coating hydrophobicity, for the solidity to corrosion of coating and useful, its anti-neutral salt spray test time can exceed 1000h.
2. this experiment adds two kinds of nanoparticles simultaneously, is respectively nanometer SiO
2with nanometer Al
2o
3, can improve hardness and the solidity to corrosion of coating.Wherein nanometer Al
2o
3as hard particles, it is dispersed in the coating structure that can form the superelevation dispersion with higher microhardness in coating as second phase particles, improved coating hardness and antiwear property.
Brief description of the drawings
The corrosion resistance nature contrast of three kinds of obtained coatings of formula of Fig. 1 the present invention and traditional Aluminum Coating and Non-chromium Zn-al Coating.
Embodiment
Embodiment 1
1. by 4, after 4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride mix with the ratio of 1:1.08, at room temperature stir, revolution is 140 revs/min, and then adding dimethyl formamide in solution, the mass ratio of solution and dimethyl formamide is 1:8, continues constant temperature and stirs 11h, leave standstill after 24h, make polyimide resin.
2. back up by following quality percentage composition: aluminum zinc powder: 58wt%, polyimide resin: 30wt%, titanate coupling agent: 1wt%, tween 20: 9wt%, nanometer SiO
2: 0.6wt%, nanometer Al
2o
3: 0.8wt%, defoamer: 0.6wt%.Wherein nanometer SiO
2with nanometer Al
2o
3particle diameter be 10 ~ 15nm, sheet footpath 0.1 ~ 0.2nm,
3. titanate coupling agent and tween 20 are joined in polyimide solution successively, under room temperature, stir until solution is faint yellow thick, then add aluminum zinc powder and defoamer, continue to stir 30min.
4. by nanometer SiO
2with nanometer Al
2o
3after ultrasonic dispersion 20min, add in the solution configuring by step 3, continue fully to stir 1h, finally obtain nano modification chromium-free zinc aluminum coating.
5. coating has been prepared and has been coated to after matrix surface, preliminary drying 30min at 100 DEG C, respectively at 200 DEG C, 215 DEG C, 235 DEG C, 260 DEG C, 290 DEG C curing 10min, 20min, 30min, 40min and 50min, finally obtain nano modification Non-chromium Zn-al Coating subsequently.
Embodiment 2
1. by 4, after 4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride mix with the ratio of 1:1.08, at room temperature stir, revolution is 140 revs/min, and then adding dimethyl formamide in solution, the mass ratio of solution and dimethyl formamide is 1:8, continues constant temperature and stirs 11h, leave standstill after 24h, make polyimide resin.
2. back up by following quality percentage composition: aluminum zinc powder: 46wt%, polyimide resin: 43wt%, titanate coupling agent: 2wt%, tween 20: 6wt%, nanometer SiO
2: 1wt%, nanometer Al
2o
3: 1wt%, defoamer: 1wt%.Wherein nanometer SiO
2with nanometer Al
2o
3particle diameter be 10 ~ 15nm, sheet footpath 0.1 ~ 0.2nm,
3. titanate coupling agent and tween 20 are joined in polyimide solution successively, under room temperature, stir until solution is faint yellow thick, then add aluminum zinc powder and defoamer, continue to stir 30min.
4. by nanometer SiO
2with nanometer Al
2o
3after ultrasonic dispersion 20min, add in the solution configuring by step 3, continue fully to stir 1h, finally obtain nano modification chromium-free zinc aluminum coating.
5. coating has been prepared and has been coated to after matrix surface, preliminary drying 30min at 140 DEG C, respectively at 200 DEG C, 215 DEG C, 235 DEG C, 260 DEG C, 290 DEG C curing 10min, 20min, 30min, 40min and 50min, finally obtain nano modification Non-chromium Zn-al Coating subsequently.
Embodiment 3
1. by 4, after 4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride mix with the ratio of 1:1.08, at room temperature stir, revolution is 140 revs/min, and then adding dimethyl formamide in solution, the mass ratio of solution and dimethyl formamide is 1:8, continues constant temperature and stirs 11h, leave standstill after 24h, make polyimide resin.
2. back up by following quality percentage composition: aluminum zinc powder: 50wt%, polyimide resin: 39wt%, titanate coupling agent: 1.5wt%, tween 20: 7wt%, nanometer SiO
2: 0.9wt%, nanometer Al
2o
3: 0.9wt%,, defoamer: 0.7wt%.Wherein nanometer SiO
2with nanometer Al
2o
3particle diameter be 10 ~ 15nm, sheet footpath 0.1 ~ 0.2nm,
3. titanate coupling agent and tween 20 are joined in polyimide solution successively, under room temperature, stir until solution is faint yellow thick, then add aluminum zinc powder and defoamer, continue to stir 30min.
4. by nanometer SiO
2with nanometer Al
2o
3after ultrasonic dispersion 20min, add in the solution configuring by step 3, continue fully to stir 1h, finally obtain nano modification chromium-free zinc aluminum coating.
5. coating has been prepared and has been coated to after matrix surface, preliminary drying 30min at 120 DEG C, respectively at 200 DEG C, 215 DEG C, 235 DEG C, 260 DEG C, 290 DEG C curing 10min, 20min, 30min, 40min and 50min, finally obtain nano modification Non-chromium Zn-al Coating subsequently.
The corrosion resistance nature of the above-mentioned three kinds of obtained coatings of formula of the present invention and traditional Aluminum Coating and Non-chromium Zn-al Coating contrasts as shown in Figure 1, wherein the resistance to neutral salt spray data of traditional Dacromet/steel and Non-chromium Zn-al Coating are selected from " chromium-free Dyclo technique and solidity to corrosion research " (Harbin Institute of Technology, 2007.7); Add nanometer Al
2o
3non-chromium Zn-al Coating and interpolation nanometer SiO
2non-chromium Zn-al Coating hardness and resistance to neutral salt spray data are selected from " formula and the performance study of steel surface nano aqueous Aluminum Coating " (Nanjing Aero-Space University, 2011.3):
As seen from Figure 1, the embodiment of the present invention 1 ~ 3 gained coating is under environment friendly and pollution-free prerequisite, and its corrosion resisting property, coating hardness are all better.Wherein the obtained coating of embodiment 3 is under environment friendly and pollution-free prerequisite, its corrosion resistance nature the best, and the hardness of gained coating is 206HV, also approaches very much the level of traditional Dacromet/steel.
Claims (3)
1. a nano modification chromium-free zinc aluminum coating, is characterized in that the each component of coating and quality percentage composition thereof are as follows: aluminum zinc powder: 46 ~ 58wt%, polyimide resin: 30 ~ 43wt%, titanate coupling agent: 1 ~ 2wt%, tween 20: 6 ~ 9wt%, nanometer SiO
2: 0.6 ~ 1wt%, nanometer Al
2o
3: 0.8 ~ 1wt%, defoamer: 0.6 ~ 1wt%; Wherein, aluminum zinc powder is flakey, and its mean particle size is 20 ~ 40 microns; Polyimide resin is after being mixed with the ratio of 1:1.08 by 4,4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride, then mixes obtained with dimethyl formamide with the mass ratio of 1:8.
2. nano modification chromium-free zinc aluminum coating according to claim 1, is characterized in that the quality percentage composition of the each component of coating is: aluminum zinc powder: 50wt%, polyimide resin: 39wt%, titanate coupling agent: 1.5wt%, tween 20: 7wt%, nanometer SiO
2: 0.9wt%, nanometer Al
2o
3: 0.9wt%, defoamer: 0.7wt%.
3. the preparation method of nano modification chromium-free zinc aluminum coating according to claim 1, is characterized in that comprising the following steps:
Step 1: by 4, after 4'-diaminodiphenyl oxide and pyromellitic acid acid anhydride mix with the ratio of 1:1.08, at room temperature stir, revolution is 120 ~ 160 revs/min, and then adding dimethyl formamide in solution, the mass ratio of solution and dimethyl formamide is 1:8, continues to continue constant temperature and stirs 8 ~ 12h, leave standstill after 24h, make polyimide resin;
Step 2: back up by following quality percentage composition: aluminum zinc powder: 46 ~ 58wt%, polyimide resin: 30 ~ 43wt%, titanate coupling agent: 1 ~ 2wt%, tween 20: 6 ~ 9wt%, nanometer SiO
2: 0.6 ~ 1wt%, nanometer Al
2o
3: 0.8 ~ 1wt%, defoamer: 0.6 ~ 1wt%;
Step 3: titanate coupling agent and tween 20 are joined in polyimide solution successively, stir until solution is faint yellow thick under room temperature, then add aluminum zinc powder and defoamer, continue to stir 30 ~ 60min;
Step 4: by nanometer SiO
2with nanometer Al
2o
3after ultrasonic dispersion 10 ~ 30min, add in the solution configuring by step 3, continue fully to stir 1 ~ 2h, finally obtain nano modification chromium-free zinc aluminum coating.
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| CN104928671B (en) * | 2014-03-21 | 2017-10-10 | 中国有色桂林矿产地质研究院有限公司 | A kind of zinc chrome cladding coating used in the surface zinc chrome processing method and this method of tool made of superhard material |
| CN106479353B (en) * | 2015-09-02 | 2019-05-21 | 佛山市高明区(中国科学院)新材料专业中心 | A kind of hydrophobic chromium-free Dyclo paint |
| CN106752228A (en) * | 2015-11-24 | 2017-05-31 | 浙江捷能汽车零部件有限公司 | A kind of water-based anticorrosive paint and preparation method thereof |
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| CN101397412A (en) * | 2008-09-17 | 2009-04-01 | 北京航材百慕新材料技术工程有限公司 | VCI-containing flake zinc and aluminum protective coating on galvanizing surface and preparation method thereof |
| CN101397413A (en) * | 2008-09-17 | 2009-04-01 | 北京航材百慕新材料技术工程有限公司 | VCI-containing flake cold-plating zinc and aluminum protective coating on steel structure surface and preparation method thereof |
| CN201272831Y (en) * | 2008-09-17 | 2009-07-15 | 北京航材百慕新材料技术工程有限公司 | Steel structure surface VCI squama zinc-aluminum coating system |
| CN101899254A (en) * | 2010-07-13 | 2010-12-01 | 襄樊普士利工程器材有限公司 | Chromium-free zinc aluminum anticorrosive paint and preparation method |
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2012
- 2012-08-08 CN CN201210279028.4A patent/CN102838929B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397412A (en) * | 2008-09-17 | 2009-04-01 | 北京航材百慕新材料技术工程有限公司 | VCI-containing flake zinc and aluminum protective coating on galvanizing surface and preparation method thereof |
| CN101397413A (en) * | 2008-09-17 | 2009-04-01 | 北京航材百慕新材料技术工程有限公司 | VCI-containing flake cold-plating zinc and aluminum protective coating on steel structure surface and preparation method thereof |
| CN201272831Y (en) * | 2008-09-17 | 2009-07-15 | 北京航材百慕新材料技术工程有限公司 | Steel structure surface VCI squama zinc-aluminum coating system |
| CN101899254A (en) * | 2010-07-13 | 2010-12-01 | 襄樊普士利工程器材有限公司 | Chromium-free zinc aluminum anticorrosive paint and preparation method |
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