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Contamination-resistant aluminum alloy chromium-free passivating agent and preparation method thereof

A chromium-free passivator and aluminum alloy technology, which is applied in the coating process of metal materials, can solve the problems of limited application, corrosion resistance and poor adhesion, and achieve good protection effect, good corrosion resistance, and stain resistance. good stain performance

Inactive Publication Date: 2016-02-10
HEFEI HAIYUAN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, titanium-zirconium-based passivation technology has the advantages of simple process, good stability and low cost, but its corrosion resistance and adhesion are not as good as chromate passivation treatment, which limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] A kind of stain-resistant aluminum alloy chromium-free passivating agent, it is made by the raw material of following weight part:

[0015] 40% fluorotitanic acid 5, 40% fluorozirconic acid 5, sodium fluoride 1, 65% nitric acid 1, nonylphenol polyoxyethylene ether 1, polyoxypropylene oxide ethylene glyceryl ether 0.1, 50% polytetrafluoroethylene emulsion 30 , polyvinylpyrrolidone 1, polyaspartic acid 2, film-forming aid 50, water 800;

[0016] Wherein the film-forming aid is made of the following raw materials in parts by weight: polyvinyl alcohol 1, bisphenol A type epoxy resin 10, glyceryl monostearate 0.5, acrylic acid 4, carbon nanotube 1, ethylene glycol butyl ether 10 , diethanolamine 5, dibenzoyl peroxide 0.2, water 60; the preparation method of film-forming aid is to add polyvinyl alcohol, bisphenol A type epoxy resin and glyceryl monostearate into the reaction vessel and stir at 85°C 4h, first add ethylene glycol butyl ether and stir at 120°C until it melts, t...

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PUM

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Abstract

The invention discloses a contamination-resistant aluminum alloy chromium-free passivating agent and a preparation method thereof. The contamination-resistant aluminum alloy chromium-free passivating agent is prepared from, by weight, 5-10 parts of 30-40% hexafluorotitanic acid, 5-10 parts of 40-45% hexafluorozirconic acid, 1-2 parts of sodium fluoride, 1-2 parts of 65-70% nitric acid, 1-2 parts of nonylphenol polyoxyethylene ether, 0.1-0.2 part of polypropylene oxide ethylene oxide glyceryl ether, 30-50 parts of 50-60% polytetrafluoroethylene emulsion, 1-2 parts of polyvinylpyrrolidone, 2-4 parts of polyaspartic acid, 50-100 parts of coalescing agents and 800-1000 parts of water. According to the aluminum alloy passivating agent, a compact film of a net structure can be formed on the surface of aluminum alloy, excellent strength, tenacity and adhesive capacity are achieved, and the corrosion resistance is good; meanwhile, the contamination resistance is good, stains such as handprint and oil stains are avoided, cleaning is easy, the protection effect is good, environment pollution can be reduced, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy passivation, in particular to a chromium-free passivator for stain-resistant aluminum alloys and a preparation method thereof. Background technique [0002] Aluminum alloys have many excellent properties and are widely used in many fields such as transportation, packaging containers, aerospace, household appliances, machinery manufacturing, building profiles, and electronic communications. However, aluminum alloys have poor corrosion resistance, wear resistance, and hardness, and are easily corroded during use. Therefore, aluminum profiles must undergo effective surface treatment before coating to avoid or reduce corrosion. [0003] As the most commonly used aluminum alloy surface treatment technology, chromate passivation treatment has the advantages of convenient use, low price, good corrosion resistance and decorative performance, but the hexavalent chromium in the treatment solution is ...

Claims

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Application Information

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IPC IPC(8): C23C22/34
CPCC23C22/34
Inventor 沈四海沈军
Owner HEFEI HAIYUAN MACHINERY