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Aluminum and aluminum alloy non-chromium passivation method and non-chromium passivation solution

A chromium-free passivation, aluminum alloy technology, applied in the coating process of metal materials, etc., can solve the problems of high cost, poor effect, inconvenient large-scale application, etc., achieve simple use process, improve corrosion resistance, enhance attachment Focus on the effect

Inactive Publication Date: 2012-11-14
东莞市闻誉实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The chromium-free passivation method of aluminum and aluminum alloy described in the prior art, or the effect after passivation is not good, and corrosion resistance can not meet practical application requirement, or because the raw material price of chromium-free passivation solution is higher, the cost High, inconvenient for large-scale application

Method used

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  • Aluminum and aluminum alloy non-chromium passivation method and non-chromium passivation solution
  • Aluminum and aluminum alloy non-chromium passivation method and non-chromium passivation solution
  • Aluminum and aluminum alloy non-chromium passivation method and non-chromium passivation solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Mix the substances according to the formula as described below, stir in a corrosion-resistant container until uniform, and then filter to obtain a chromium-free passivation solution.

[0049] Described chrome-free passivation solution comprises by mass percent:

[0050]

[0051] First clean the surface of the aluminum part with an acidic or neutral cleaning solution to remove oil and dust on the surface of the aluminum part; then clean other impurities remaining on the surface of the aluminum part with water; then, passivate the surface of the aluminum part with the passivation solution described in Example 1 A layer of conversion coating is formed on the surface of the aluminum part, and finally the surface of the aluminum material is cleaned with water and deionized water.

Embodiment 2

[0053] Mix the substances according to the formula as described below, stir in a corrosion-resistant container until uniform, and then filter to obtain a chromium-free passivation solution.

[0054] Described chrome-free passivation solution comprises by mass percent:

[0055]

[0056] First clean the surface of the aluminum part with an acidic or neutral cleaning solution to remove oil and dust on the surface of the aluminum part; then clean other impurities remaining on the surface of the aluminum part with water; then, passivate the surface of the aluminum part with the passivation solution described in Example 2 A layer of conversion coating is formed on the surface of the aluminum part, and finally the surface of the aluminum material is cleaned with water and deionized water.

Embodiment 3

[0058] Mix the substances according to the formula as described below, stir in a corrosion-resistant container until uniform, and then filter to obtain a chromium-free passivation solution.

[0059] Described chrome-free passivation solution comprises by mass percent:

[0060]

[0061] First clean the surface of the aluminum part with an acidic or neutral cleaning solution to remove oil and dust on the surface of the aluminum part; then clean other impurities remaining on the surface of the aluminum part with water; then, passivate the surface of the aluminum part with the passivation solution described in Example 3 A layer of conversion coating is formed on the surface of the aluminum part, and finally the surface of the aluminum material is cleaned with water and deionized water.

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Abstract

The invention relates to an aluminum and aluminum alloy non-chromium passivation method and non-chromium passivation solution. The aluminum and aluminum alloy non-chromium passivation method comprises the step of contacting the surface of the aluminum and aluminum alloy with non-chromium passivation solution, wherein the non-chromium passivation solution comprises the following ingredients: a) titanate; b) zirconate; c) modified organic silicon resin; and d) epoxy resin. The invention further provides the non-chromium passivation solution which can produce an even conversion coating on aluminum and aluminum alloy sediment. The coating has excellent corrosion resistance performance, and time for producing white corrosion product is prolonged. The non-chromium passivation method has low cost, is simple to operate and also has higher environment-friendly values.

Description

technical field [0001] The invention relates to metal surface treatment technology, in particular, the invention relates to a chromium-free passivation method and a chromium-free passivation solution for aluminum and aluminum alloys. Background technique [0002] Aluminum surface treatment is a professional technology involving many fields, including automobiles, motorcycles, aerospace, household appliances, electronics, building materials, and general metal processing. Among them, chemical conversion coating is the most commonly used technical means in aluminum surface treatment. The chemical conversion coating has a certain corrosion resistance and good physical adsorption capacity, which can greatly improve the bonding force between the aluminum substrate and the coating, and enhance the corrosion resistance of aluminum products. Its processing speed is fast, it does not consume electric energy, and the required equipment is simple. , Low processing cost. At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/56
Inventor 叶伟炳
Owner 东莞市闻誉实业有限公司