CN201272831Y - Steel structure surface VCI squama zinc-aluminum coating system - Google Patents
Steel structure surface VCI squama zinc-aluminum coating system Download PDFInfo
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- CN201272831Y CN201272831Y CNU2008201362029U CN200820136202U CN201272831Y CN 201272831 Y CN201272831 Y CN 201272831Y CN U2008201362029 U CNU2008201362029 U CN U2008201362029U CN 200820136202 U CN200820136202 U CN 200820136202U CN 201272831 Y CN201272831 Y CN 201272831Y
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Abstract
A VCI zinc-aluminum composite coating system for surfaces of steel structures is composed of a steel substrate and a scaly zinc-aluminum-plated coating layer, and is characterized in that the scaly zinc-aluminum-plated coating is made of VCI zinc-aluminum-plated coating materials.
Description
Technical field
The present invention relates to a kind ofly be used for steel construction surface and contain VCI (Vapor corrosioninhibitor, the gas phase sustained release dosage) Palta type cold galvanizing aluminum paint and preparation method thereof, and the steel construction of preparation thus surface VCI Palta type cold galvanizing aluminium protective coating system.
Background technology
Zinc-rich paint is the most widely used rust-proofing primer in anticorrosion of steel structure field and shop primer field, is different from common hot dip galvanizing process, and this coating is spraying application and curing at normal temperatures, is commonly called as " cold galvanizing ".But the zinc-rich paint of practical application all belongs to the ball zinc paint in the domestic and international project at present, is filler with spherical zinc powder all promptly.In order to pursue high dry film zinc content, to guarantee the conduction and the work-ing life of coating, the add-on of zinc powder is up to more than 80% in the slip in the ball zinc paint.So a large amount of interpolation zinc powders has substantially exceeded the critical volume concentration (CPVC) of filler.The quantity not sufficient of binding agent is with the intergranular hole of filling ball zinc in the slip, and this just is doomed the porousness of coating structure, and porosity is big, and shielding is poor.Simultaneously, zinc content is too high in the coating, and the just easy porous of coating causes that horizontal copolymerization destroys (layering), if apply other high solid component finish paint again, the tendency that just can make finish paint generate bubble increases on the zinc rich primer.In construction is stifled rifle, the gambling pipe fault that also often takes place because of ball zinc precipitation causes, thereby has influenced application weight and operating efficiency.
Protective system with the preparation of Palta type zinc powder, spraying application is on the steel construction surface through sandblasting, formed the Palta type cold galvanizing aluminum coating of tile bridging arrangement, the CPVC (critical pigment volume concentration) of coating is reduced, the consumption of zinc powder reduces, the coating densification, erosion resistance is better, and because good shielding properties, parallel overlap joint performance, electrical contact performance, the easy characteristic that suspends of Palta type zinc powder makes the antiseptic property of this a series of Palta type zinc-rich paint and workability obviously be better than traditional ball zinc zinc-rich paint.For example the particle diameter of spherical zinc powder is about 5～10 μ m, and the thickness of sheet zinc has only one of percentage of common ball zinc about 0.1 μ m.Be all the coating of 60 μ m like this; which floor zinc granule common ball zinc has only; and the Palta type zinc powder can form the system of parallel overlap joint, folded array in coating; layers up to a hundred have been reached; be to contact between the sheet zinc of parallel overlap joint with the point that the face contact replaces between ball zinc; though so zinc powder interpolation quantity reduces significantly in the coating, coating still maintains good conduction, has guaranteed the electro-chemical protection performance of coating.
Summary of the invention
In order to overcome above-mentioned defective, the present invention adopts at steel construction surface-coated one deck protective coating, makes itself and steel construction form a VCI Palta type cold galvanizing aluminum coating compound system so that steel construction reaches a longer anticorrosion life-span.
According to a kind of technical scheme of the present invention, its coating is pure dissolubility VCI Palta type cold galvanizing aluminum paint, and wherein this cold galvanizing aluminum paint is made up of by following weight ratio two kinds of components of A, B,
A component: flake zinc powder 3%～30%; Flakey aluminium powder 3%～20%; Leveling auxiliary agent 0.1～0.5%; Resin 15%～20%; Vapour-phase inhibitor 0.5%～3%; Solvent 5%～20%;
B component: solidifying agent 5%～20%; Thixotroping auxiliary agent: 0.1～1.0%; Solvent 5%～20%.
The weight sum of A+B component is 100%.
According to a kind of technical scheme of the present invention, a kind of compound coating system of steel construction is made of steel substrate and Palta type cold galvanizing aluminum coating, it is characterized in that, described Palta type cold galvanizing aluminum coating is made of above-mentioned pure dissolubility VCI Palta type cold galvanizing aluminum paint.
According to another embodiment of the present invention, the preparation method of pure dissolubility zinc-aluminium coating comprises the steps:
The preparation of A component: flake zinc powder and flakey aluminium powder joined in the low boiling point organic solvent stir, behind the thorough mixing, add leveling auxiliary agent and resin and vapour-phase inhibitor, stir.
The preparation of B component: solidifying agent is dissolved in the low boiling point organic solvent, adds the thixotroping auxiliary agent then; Stir.
During use,, be generally about half an hour, promptly get pure dissolubility VCI Palta type cold galvanizing aluminum paint of the present invention two kinds of component thorough mixing of A, B and stirring.
In preferred embodiments, the sheet of Palta type zinc powder and Palta type aluminium powder is thick is below the 1 μ m; Preferably at 0.1～1 μ m; More preferably at 0.1～0.8 μ m; 0.2～0.4 μ m most preferably; Sheet directly is below the 50 μ m, preferably at 1～50 μ m; More preferably at 5～45 μ m; 15～30 μ m most preferably.
The gross weight of flake zinc powder coating based is preferably 5-28% weight, more preferably 8-25% weight, most preferably 10-20% weight; The gross weight of flakey aluminium powder coating based is preferably 5-18% weight, more preferably 8-15% weight, most preferably 10-12% weight.
VCI; be that vapour-phase inhibitor claims volatile corrosion inhibitor again; automatically the gas adsorption that volatilizes at normal temperatures can suppress the atomospheric corrosion of metal on metallic surface, the not direct contacting metal surface of vapour-phase inhibitor; can spontaneously be adsorbed on protected metallic surface; form layer protecting film, therefore can make surface, inner chamber, pipeline, groove even the slit of metal products not be divided into and can both be protected, its rust-proof life is long; easy and simple to handle, cost is low.But because the boiling characteristics of VCI, this technology all is applied to the protection of steel construction in the closed environment usually, and the porosity of common paint coatings is bigger, causes the volatilization loss of VCI easily, so this technology seldom is applied in the coating.But because the existence of scale type aluminum zinc powder in the coating, make whole coating form the bridging arrangement of tile, make coating have high shielding properties, the good premise condition is provided for the VCI The Application of Technology, reduced the invalid loss that causes owing to the diffusion of VCI in coating greatly, improved the service efficiency of VCI, so the present invention has adopted the VCI technology research Palta type cold galvanizing aluminum paint and preparation method thereof that combines with the scale type aluminum zinc powder technology.
Vapour-phase inhibitor of the present invention is the vapour-phase inhibitor of this area routine, comprises low-molecular-weight amine, as Isopropylamine, diethylamine, hexahydroaniline, octylame, quadrol, divinyl triamine, trivinyl tetramine etc.; Also comprise nitrous acid ethylenimine, dicyclo base in the sixth of the twelve Earthly Branches amine, monoethanolamine, cyclohexylamine carbonate, nitrous acid bicyclohexane base ammonium or lipid acid dicyclohexyl amine salt; Or amine such as hexamethylenetetramine; Or dimethyl thiourea, Sodium Benzoate, sodium sulfonate etc.; Preferred nitrous acid ethylenimine, dicyclo base in the sixth of the twelve Earthly Branches amine, monoethanolamine, hexamethylenetetramine or dimethyl thiourea.
In preferred embodiments, the resin in the A component, preferably polyethylene butyral and Resins, epoxy; Leveling auxiliary agent is the auxiliary agent of this area routine, as modified polyorganosiloxane type flow agent, the restricted long-chain resin type of consistency flow agent, as Voncoat R 3310 and multipolymer; With the high boiling solvent is the flow agent of main component, preferred modified polyorganosiloxane type flow agent, polyimide, polycarbonate, polyacrylic acid, more preferably modified polyorganosiloxane type flow agent.Solvent is preferably low boiling point organic solvent, as alcohols or arene, and more preferably alcohols, also more preferably C
1-C
6Alkanol, most preferred ethanol and propyl carbinol.
The solidifying agent preferred alkyl silicon ester of B component, polymeric amide, aliphatic amide, phenolic aldehyde amine, inferior ketoamine class, preferred polyol alkyl silicate also, it adopts polycondensation siloxanes, alkyl silicate or formula to contain hydroxyalkyl, the alkoxyalkyl of 1-6 carbon atom, the organosilicon acid esters and the polyvalent alcohol of hydroxyl alkoxyalkyl carries out transesterification reaction, generates the precondensation product with certain molecular weight.
Preferred wilkinite of thixotroping auxiliary agent or aerosil etc.; Preferred alcohols of solvent or arene, more preferably monobasic C
1-C
6Alkanol or polyvalent alcohol and arene, especially preferred alcohol, propyl carbinol, ethylene glycol, two hexylene glycols, dipropylene glycol, toluene, dimethylbenzene etc.; Most preferred ethanol, propyl carbinol and dimethylbenzene.
According to a kind of embodiment of the present invention, its coating is water-soluble VCI Palta type cold galvanizing aluminum paint, form by following weight ratio by two kinds of components of A, B,
A component: flake zinc powder 5%～30%; Flakey aluminium powder 5%～15%,
B component: solidifying agent 25%～35%; Thixotroping auxiliary agent 0.1～1.0%; Vapour-phase inhibitor 0.5%～3%; Solvent 10%～20%.
The summation of A+B component is 100% quality.
According to another kind of technical scheme of the present invention, a kind of compound coating system of steel construction, be made of steel substrate and Palta type cold galvanizing aluminum coating, it is characterized in that, described Palta type cold galvanizing aluminum coating is made of above-mentioned water-soluble VCI Palta type cold galvanizing aluminum paint.
The present invention also further relates to following technical scheme, and a kind of preparation method of aforesaid water soluble paint is characterized in that:
The preparation of A component, flake zinc powder and flakey aluminium powder mixing and stirring.
The preparation of B component: solidifying agent is added to the water to stir, and adds thixotroping auxiliary agent and vapour-phase inhibitor then, stirs.
During use,, be generally about half an hour, promptly get water-soluble zinc-aluminium coating of the present invention two kinds of component thorough mixing of A, B and stirring.
For the requirement of flake zinc powder, flakey aluminium powder and vapour-phase inhibitor, water-soluble VCI Palta type cold galvanizing aluminum paint in the pure dissolubility VCI Palta type cold galvanizing aluminum paint definition.
And for solidifying agent, the solidifying agent in the water-soluble Palta type cold galvanizing aluminum paint is preferably high-module lithium silicate, potassium silicate, sodium silicate aqueous solution etc.; The thixotroping auxiliary agent is preferably sodium alginate or aerosil etc.; Solvent is a water.
According to a kind of embodiment of the present invention,, when being administered to the steel construction surface, preferably sandblasting is carried out on the surface, to strengthen the sticking power on pure dissolubility VCI zinc-aluminium coating and steel construction surface for pure dissolubility VCI zinc-aluminium coating.Simultaneously pure dissolubility VCI zinc-aluminium coating can adopt paste to contain stearic zinc powder and/or aluminium powder as filler.Can save like this among sheet zinc (aluminium) preparation technology clean, oven dry, suction filtration and disperse four big operations again, thereby save man-hour about 3/5, it is about 2/3 to save electric power, the manufacturing cost of sheet zinc (aluminium) is reduced surpass 50%, and further improved the execution of coating performance.
According to another embodiment of the present invention, for water-soluble VCI Palta type cold galvanizing aluminum paint, raw material flake zinc powder wherein and flakey aluminium powder preferably carry out skimming treatment, as adopt clean-out system that skimming treatment is carried out on the surface of flake zinc powder and flakey aluminium powder, thereby overcome the flake zinc powder of present preparation and the deficiency that the flakey aluminium powder can't be adapted to water-borne coatings, make flake zinc powder and flakey aluminium powder can be adapted to the water-borne coatings field.Described clean-out system is selected from dodecyl diglycollic amide, fatty alcohol-polyoxyethylene ether, polyoxyethylene octylphenol ether or alkyl sodium sulfonate.
The present invention can realize comparatively harsh salt spray resistance about 4000h by the compound coating of handling.
The novel environment-friendly type Palta type cold galvanizing aluminum paint of the present invention's preparation has following characteristics:
1, this paint coatings is an inorganic coating, and the anti-ultraviolet ageing performance is good, long service life;
2, adopt Palta type zinc powder and aluminium powder as filler, the coating shielding is good, and etch resistant properties is good;
3, adopt the high-performance vapour-phase inhibitor in the coating, zinc-impregnating layer and zinc powder have been played corrosion inhibition, slowed down the consumption of zinc powder, and the generation that has reduced zinc powder surface white zinc oxide;
4, coating good luster, metal-like is strong, and is ornamental good.
In preferred embodiments, the zinc-aluminium coating of preferred ethanol-soluble type, because it is good with the surperficial affinity of zinc-impregnating layer, strong adhesion, edge-protected property is strong; The solvent that adopts is nontoxic environmentally friendly solvent; The etch resistant properties excellence; Also curable below 0 ℃, can all-weather construction; But all-weather construction.Coating has dried coating film characteristic rapidly, can construct in the environment of environment below 0 ℃ and high humidity, is fit to airless spraying.Film can be under-20 ℃～400 ℃ broad condition life-time service.And fugitive color and zinc white occurs not; Production technique is convenient.
Description of drawings
Fig. 1 is the anti-corrosion compound coating system that VCI scale type aluminum zinc paint coatings and substrate of steel plate form.
1---substrate of steel plate; 2---the VCI coating.
Embodiment
The present invention is described in detail by the following examples, and described embodiment is convenient to understand the present invention, but not limitation of the present invention, those skilled in the art, on the basis of reading specification sheets of the present invention, any modification or the change made can not deviate from the spirit and scope of the present invention.
The preparation of test sample plate
Unless stated otherwise, test sample plate is generally cold-rolling mild steel plate.Steel plate at first will carry out sandblasting before applying pure dissolubility VCI Palta type cold galvanizing aluminum paint.
Coating to test component
After two components of alcohol molten (or water-based) VCI scale zinc-aluminium coating are mixed in proportion, with air gun with the paint spay-coating for preparing on the above-mentioned test sample plate that has prepared.After the spraying, adopt the form of seasoning, and parked at least two weeks, carry out following test then.
Crooked experiment
Test procedure by ASTM-D522 is realized.With a coated side that scribbles the adhesive tape sticking of pressure sensitive adhesive in test sample plate deformation part, open rapidly then.The lacquer amount that coating is taken away according to the adhesive tape that is stuck is calculated.
Draw the lattice experiment
At first with one sharp keen cutter is streaked coating on the set iron, first group of parallel lines is vertical with second group of parallel lines.The part of streaking in the test sample plate coated side with an adhesive tape sticking that scribbles pressure sensitive adhesive is opened rapidly then again.The lacquer amount that coating is taken away according to the adhesive tape that is stuck is calculated.
Preservation test (ASTM B 117) and assessment
The preservative property on coated surface are to test according to the method to the standard salt mist experiment ASTMB-117 of paint and varnish.During test, parts are placed in the container keep constant temperature, make it to be exposed in the thin salt fog of 5% weight salts solution, keep definite for some time, use water rinse then, dry again.The extent of corrosion of unit under test is represented with the per-cent of red rust.For the tested model of curved part, crooked corrosive fluid can be represented with the per-cent of red rust.At first apply and bending, again a Pressuresensitive Tape is sticked on curved part, take off away adhesive tape rapidly.Adhesive tape is as measuring coated adhesive.Model is as the preservative property experiment.(assessment also can experimentize with reference to the salt spray resistance experimental technique of chemical industry standard HG/T 3668 " zinc rich primer ".)
Embodiment 1 (preparation of pure dissolubility VCI Palta type cold galvanizing aluminum paint)
A component preparation: with sheet thick≤Palta type zinc powder 300 grams of 0.2 μ m, sheet footpath≤20 μ m and sheet be thick≤0.1 μ m, sheet footpath≤25 μ m Palta type aluminium powders 100 restrain, joining in 100mL, 95% the ethanol stirs more than 0.5 hour, make both thorough mixing even, add 2 gram modified polyorganosiloxane type flow agents, 150 gram polyvinyl butyral acetals and 10 gram nitrite cyclohexylamines, stir more than 0.5 hour, to even.
The preparation of B component: 160 gram alkyl silicates are dissolved in to stir thorough mixing in 100mL, 95% the ethanol even, add 2 gram organobentonites, stir.
Before the coating, two kinds of components of A, B are mixed, after stirring, obtain silver gray finished product alcohol dissolubility Palta type cold galvanizing aluminum paint.
Embodiment 2 (preparation of water-soluble VCI Palta type cold galvanizing aluminum paint)
A component preparation: with sheet thick≤the Palta type zinc powder 300 of 0.2 μ m, sheet footpath≤20 μ m restrains; Sheet is thick≤Palta type aluminium powder 200 grams of 0.2 μ m, sheet footpath≤20 μ m, and make both thorough mixing even.
The preparation of B component: the deionized water for stirring that 300 gram high-modulus sodium silicates is joined 100mL is even, adds 1 gram sodium alginate and 10 gram nitrite cyclohexylamines then, stirs more than 0.5 hour, extremely evenly.
Before the coating, two kinds of components of A, B are mixed, after stirring, obtain the water-soluble Palta type cold galvanizing of silvery white finished product aluminum paint.
Experimental result
Adopt Palta type cold galvanizing aluminum paint of the present invention that substrate of steel plate is carried out The coating experiment, substrate of steel plate is the cold rolled sheet that reaches 2.5 grades of sandblasts, and the sheet material specification is 150 * 70 * 2mm; The coat-thickness of alcohol dissolubility/water-based VCI Palta type cold galvanizing aluminum paint is 30～60 μ m, preferred 40～50 μ m.
Alcohol dissolubility/water-based VCI scale type aluminum zinc compound coating all sprays on steel construction surface, and coat-thickness is all about 40～50 μ m.Through cross-hatching and bending method check, coating adhesion is good.Through long lifetime salt mist experiment (draw fork method) check, the coating salt spray resistance life-span reaches 4000h, and coating does not ftracture, do not bubble, no red rust, and white product is less.Through the damp and hot examination of 4000h, coating is intact simultaneously.
Claims (6)
1, a kind of zinc-aluminium compound coating system that is used for the steel construction surface is made of steel substrate and Palta type cold galvanizing aluminum coating, it is characterized in that, described Palta type cold galvanizing aluminum coating is made of pure dissolubility VCI Palta type cold galvanizing aluminum paint coating.
2, compound coating system according to claim 1, wherein said substrate of steel plate is cold rolled sheet or hot sheet.
3, according to each described compound coating system of claim 1-2, the thickness of wherein said Palta type cold galvanizing aluminum coating is 40-50 μ m.
4, a kind of compound coating system that is used for the steel construction surface comprises steel substrate and Palta type cold galvanizing aluminum coating, it is characterized in that, described Palta type cold galvanizing aluminum coating is made of water-soluble VCI Palta type cold galvanizing aluminum paint coating.
5, compound coating system according to claim 4, wherein said substrate of steel plate is cold rolled sheet or hot sheet.
6 according to claim 4 or 5 described compound coating systems, and the thickness of wherein said Palta type cold galvanizing aluminum coating is 40-50 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201362029U CN201272831Y (en) | 2008-09-17 | 2008-09-17 | Steel structure surface VCI squama zinc-aluminum coating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201362029U CN201272831Y (en) | 2008-09-17 | 2008-09-17 | Steel structure surface VCI squama zinc-aluminum coating system |
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| CN201272831Y true CN201272831Y (en) | 2009-07-15 |
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| CNU2008201362029U Expired - Lifetime CN201272831Y (en) | 2008-09-17 | 2008-09-17 | Steel structure surface VCI squama zinc-aluminum coating system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838929A (en) * | 2012-08-08 | 2012-12-26 | 南京航空航天大学 | Nano-modification chromium-free zinc-aluminium coating and preparation method thereof |
| CN103484869A (en) * | 2013-09-25 | 2014-01-01 | 瓮福（集团）有限责任公司 | Anticorrosion method for tracks of phosphoric acid filtering machine |
| CN104404530A (en) * | 2014-12-06 | 2015-03-11 | 赵冯 | Water-based metal anti-rust agent |
| CN104404529A (en) * | 2014-12-06 | 2015-03-11 | 赵冯 | Water-based long-acting metal anti-rust agent |
| CN112210298A (en) * | 2020-09-29 | 2021-01-12 | 深圳市深涂涂料有限公司 | Formula of water-based cold aluminum and zinc plating coating and preparation method of application thereof |
-
2008
- 2008-09-17 CN CNU2008201362029U patent/CN201272831Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838929A (en) * | 2012-08-08 | 2012-12-26 | 南京航空航天大学 | Nano-modification chromium-free zinc-aluminium coating and preparation method thereof |
| CN102838929B (en) * | 2012-08-08 | 2014-11-26 | 南京航空航天大学 | Nano-modification chromium-free zinc-aluminium coating and preparation method thereof |
| CN103484869A (en) * | 2013-09-25 | 2014-01-01 | 瓮福（集团）有限责任公司 | Anticorrosion method for tracks of phosphoric acid filtering machine |
| CN104404530A (en) * | 2014-12-06 | 2015-03-11 | 赵冯 | Water-based metal anti-rust agent |
| CN104404529A (en) * | 2014-12-06 | 2015-03-11 | 赵冯 | Water-based long-acting metal anti-rust agent |
| CN112210298A (en) * | 2020-09-29 | 2021-01-12 | 深圳市深涂涂料有限公司 | Formula of water-based cold aluminum and zinc plating coating and preparation method of application thereof |
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Address after: Box 18, box 18, Beijing 100095, Huan village, Wenquan Town, Beijing, Haidian District Patentee after: BIAM New Materials Technology Engineering Co., Ltd. Address before: Box 18, box 18, Beijing 100095, Huan village, Wenquan Town, Beijing, Haidian District Patentee before: Beijing aerospace material baimu new material technical engineering Co., Ltd. |
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Owner name: AVIC BIAM NEW MATERIAL TECHNOLOGY ENGINEERING CO., Free format text: FORMER NAME: BEIJING BIAM NEW MATERIALS TECHNOLOGY ENGINEERING CO., LTD. |
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Address after: 100095 Beijing Haidian District hot springs town, ring village, Beijing 18 mailbox 18 boxes Patentee after: AVIC Biam New Material Technology Engineering Co., Ltd. Address before: 100095 Beijing Haidian District hot springs town, ring village, Beijing 18 mailbox 18 boxes Patentee before: BIAM New Materials Technology Engineering Co., Ltd. |
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