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Chromium-free zinc aluminum anticorrosive paint and preparation method

An anti-corrosion coating, zinc-aluminum technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of low corrosion resistance, thick film thickness, high curing temperature, etc., to achieve short production time and corrosion resistance Good performance and low cost

Inactive Publication Date: 2010-12-01
襄阳普士利工程器材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the diluent uses toxic and harmful organic solvents such as toluene and xylene, it pollutes the environment
Furthermore, although the film layer has good adhesion, the corrosion resistance is not high, the hardness is not high, and the film thickness is too thick.
A patented technology of chromium-free dacromet coating (CN101260252A), the coated metal parts are cured at 200-400 °C, the curing temperature required for the treatment process is high, and the energy consumption is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A chrome-free zinc-aluminum anticorrosion coating and its preparation method: firstly stir 5-10wt% flaky zinc powder and 10-15wt% flaky aluminum powder evenly, then add 30-40wt% ethylene glycol ethyl ether acetate, 1.5-1.8wt% of fatty alcohol polyoxyethylene ether AEO-3, 3-5wt% of thiourea and 5-10wt% of nano-silica modified on the surface of nano-scale microemulsion, stirred for 20-40min to prepare Binder. Then 8-15wt% of polyurethane modified epoxy resin, 1-3wt% of organic silane coupling agent KH-550 and 25-30wt% of ethylene glycol ethyl ether acetate are stirred evenly and added to the base material, Stir for 30-50 minutes, then add 0.05-0.5 wt% hydroxyethyl cellulose, and stir for 20-50 minutes to prepare the chromium-free zinc-aluminum anticorrosive coating.

[0017] The chromium-free zinc-aluminum anticorrosion coating prepared in this example, the coating after coating is tested: the hardness is 6H, the adhesion is 5 grades, the salt spray test is 480-490 hours...

Embodiment 2

[0019] A chrome-free zinc-aluminum anti-corrosion coating and its preparation method: a chrome-free zinc-aluminum anti-corrosion coating and its preparation method: firstly stir 5-10 wt% flaky zinc powder and 10-15 wt% flaky aluminum powder evenly, then add 30-40 wt% of cyclohexanone, 1.5-1.8 wt% of fatty alcohol polyoxyethylene ether AEO-4, 3-5 wt% of thiourea and 5-10 wt% of nano-silicon carbide surface-modified by nano-scale microemulsion , and stirred for 20-40 minutes to make the base material. Then the cyclohexanone of 8~15wt% polyurethane modified epoxy resin and epoxy modified phenolic resin, 1~3wt% organic silane coupling agent KH-560 and 25~30wt% is stirred evenly and added to The base material is stirred for 30-50 minutes, then 0.05-0.5 wt% of hydroxyethyl cellulose is added, and stirred for 20-50 minutes to prepare the chromium-free zinc-aluminum anticorrosion coating.

[0020] The chrome-free zinc-aluminum anticorrosion coating prepared in this example, the coati...

Embodiment 3

[0022] A chrome-free zinc-aluminum anti-corrosion coating and its preparation method: a chrome-free zinc-aluminum anti-corrosion coating and its preparation method: firstly stir 5-10 wt% flaky zinc powder and 10-15 wt% flaky aluminum powder evenly, then add 30-40wt% ethylene glycol ether acetate and acetone, 1.5-1.8wt% fatty alcohol polyoxyethylene ether AEO-5, 3-5wt% benzotriazole and 5-10wt% nano-sized micro The surface-modified nano silicon dioxide of the emulsion is stirred for 20-40 minutes to make the base material. Then 8-15wt% of polyurethane modified epoxy resin, 1-3wt% of organic silane coupling agent KH-570 and 25-30wt% of ethylene glycol ether acetate and acetone are stirred evenly and added to the base material , stirring for 30-50 minutes, then adding 0.05-0.5 wt% hydroxyethyl cellulose, and stirring for 20-50 minutes to prepare a chrome-free zinc-aluminum anti-corrosion coating.

[0023] The chromium-free zinc-aluminum anticorrosion coating prepared in this exa...

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Abstract

The invention relates to a chromium-free zinc aluminum anticorrosive paint and a preparation method. The invention adopts the technical scheme that the preparation method comprises the following steps of: stirring 5 to 25 weight percent of flake zinc powder and 5 to 15 weight percent of flake aluminum powder uniformly, adding 25 to 40 weight percent of organic solvent, 1.1 to 1.8 weight percent of dispersant, 3 to 8 weight percent of corrosion inhibitor and 3 to 10 weight percent of inorganic additive into the powder, and stirring the mixture for 20 to 40 minutes to form a base material; and then stirring 5 to 15 weight percent of modified resin, 1 to 3 weight percent of organic silane coupling agent and 25 to 30 weight percent of organic solvent uniformly, and adding the mixture into the base material; or stirring the mixture for 30 to 50 minutes to obtain the chromium-free zinc aluminum anticorrosive paint; or stirring the mixture for 30 to 50 minutes, adding 0.05 to 0.5 weight percent of hydroxyethyl cellulose into the mixture, and stirring the mixture for 20 to 50 minutes to obtain the chromium-free zinc aluminum anticorrosive paint. The preparation method has the characteristics of environment friendliness, low energy consumption and low cost; and a coating coated by the prepared chromium-free zinc aluminum anticorrosive paint has high impact strength, good corrosion resistance, strong bonding force and high hardness.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a chromium-free zinc-aluminum anti-corrosion coating and a preparation method. Background technique [0002] Due to poor corrosion resistance, high energy consumption, serious pollution, hydrogen embrittlement, and the use temperature is limited by the aging temperature of the passivation film, the traditional electro-galvanizing and hot-dip galvanizing processes can only be used below 100°C, which has great limitations sex. Zinc-aluminum coating (Dacromet coating) has been widely used in the fields of automobile, medicine, electric power, petroleum and military industry due to its incomparable advantages over traditional electro-galvanizing and hot-dip galvanizing. Zinc-aluminum coating is a mixture composed of flaky zinc powder and aluminum powder, chromic anhydride, wetting agent, dispersant, deionized water and other additives, stirred evenly, coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D161/14C09D133/00C09D5/10
Inventor 王小红柯昌美王全全张雯雯胡永周黎琴罗俊松
Owner 襄阳普士利工程器材有限公司
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