Zinc-aluminum-magnesium alloy self-repairing chromium-free passivator as well as preparation method and application thereof

A chromium-free passivation agent, zinc-aluminum-magnesium technology, applied in the direction of metal material coating process, can solve the problems of environmental and human harm, and achieve the effect of improving corrosion resistance, excellent corrosion resistance and weather resistance

Pending Publication Date: 2021-06-15
合肥华清方兴表面技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because Cr(Ⅵ) is harmful to the environment and the human

Method used

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  • Zinc-aluminum-magnesium alloy self-repairing chromium-free passivator as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]10 parts of anionic acrylic modified epoxy resin, 5 parts of modified alkaline silica sol, 3 parts of nano-scale hydroxyl graphene sol, 5 parts of silicate, 3 parts of zinc nitrate, 5 parts of sodium tungstate, 0.05 part of soluble aluminum salt , 1 part of cerium sulfate, 20 parts of alcohol ester twelve, 2 parts of benzotriazole, 2 parts of sodium ferrate, and the rest is water;

[0046] The pH value of the chromium-free conversion agent is 8.0-9.0.

Embodiment 2

[0048] 10 parts of anionic acrylic modified epoxy resin, 5 parts of modified alkaline silica sol, 5 parts of silicate, 3 parts of zinc nitrate, 5 parts of sodium tungstate, 0.05 parts of soluble aluminum salt, 1 part of ceric sulfate, alcohol ester 20 parts of twelve, 2 parts of benzotriazole, 2 parts of sodium ferrate, and the rest is water;

[0049] The pH value of the chromium-free conversion agent is 8.0-9.0.

Embodiment 3

[0051] 10 parts of anionic acrylic modified epoxy resin, 5 parts of modified alkaline silica sol, 3 parts of nano-scale hydroxyl graphene sol, 5 parts of silicate, 3 parts of zinc nitrate, 5 parts of sodium tungstate, 0.05 part of soluble aluminum salt , 20 parts of alcohol ester twelve, 2 parts of benzotriazole, 2 parts of sodium ferrate, and the rest is water;

[0052] The pH value of the chromium-free conversion agent is 8.0-9.0.

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Abstract

The invention relates to the technical field of metal surface treatment chemicals, and provides a zinc-aluminum-magnesium alloy self-repairing chromium-free passivator as well as a preparation method and application thereof. The chromium-free passivator comprises 10-15 parts of anionic acrylic acid modified epoxy resin, 5-30 parts of modified alkaline silica sol, 3-5 parts of nanoscale hydroxyl graphene sol, 5-10 parts of silicate, 3-5 parts of zinc nitrate, 5-10 parts of sodium tungstate, 0.05-2 parts of soluble aluminum salt, 1-3 parts of ceric sulfate, 20-40 parts of a film forming accelerant, 2-8 parts of a stabilizer, 4-8 parts of a pH regulator, 2-6 parts of an oxidizing agent, and the balance water. A zinc-aluminum-magnesium alloy treated by the chromium-free passivator has bright appearance, and the passivated zinc-aluminum-magnesium alloy has excellent corrosion resistance, humidity and heat resistance and weather resistance; and the prepared chromium-free passivator is environmentally friendly, can replace a traditional hexavalent chromium passivator, is expected to be widely applied to the zinc-aluminum-magnesium industry, and has great industrial value and social value.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment chemicals, in particular to a zinc-aluminum-magnesium alloy self-repairing chromium-free passivator and its preparation method and application. Background technique [0002] Hot-dip galvanizing is to make the molten metal react with the iron substrate to produce an alloy layer, so that the substrate and the coating are combined. Hot-dip galvanized steel has the advantages of uniform coating, strong adhesion, long service life, simple manufacturing process, and low product price. It is increasingly demanded in many different industries such as automobile industry, electrical industry and construction industry. In order to improve the corrosion resistance of hot-dip galvanized steel, zinc-alloy coated steel, including zinc-aluminum-magnesium-coated steel, is produced by adding elements such as magnesium and aluminum to pure zinc-coated steel. [0003] Zinc-aluminum-magnesium-coated ...

Claims

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Application Information

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IPC IPC(8): C23C22/60
CPCC23C22/60
Inventor 何园刘万青
Owner 合肥华清方兴表面技术有限公司
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