Nano self-assembling granular membrane surface treatment liquid and method for preparing same

A nano-self-assembly and surface treatment liquid technology, applied in the coating process of metal materials, etc., can solve the problem of wet adhesion not reaching the chromate conversion coating, so as to improve flexibility, simplify production process and improve production efficiency Effect

Active Publication Date: 2006-10-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wet adhesion of the organic-inorganic composites prepared by the sol-gel method at room temperature still cannot reach the level of chromate conversion coatings, and high temperature treatment is required to improve its wet adhesion.
Environmentally friendly surface treatment technology with good shielding performance, self-healing and bonding performance has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 54g of distilled water in a 600ml beaker, adjust the pH to 4-5 with acetic acid, add 22.83g of methyl orthosilicate and 11.82g of β-(3,4-epoxycyclohexyl) ethyl dropwise under stirring conditions. After the dropwise addition of the mixture of trimethoxysilane is completed, 59.1g of nano-cerium oxide is added, stirring is continued for 24h, and then ground with a sand mill for 2h. A nano-cerium oxide slurry with a weight ratio of 40% nano-cerium oxide is prepared.

Embodiment 2

[0024] The preparation method is the same as in Example 1. The addition amount of nano cerium oxide, methyl orthosilicate and β-(3,4-epoxycyclohexyl) ethyl trimethoxysilane is adjusted, wherein methyl orthosilicate and β-( The ratio of 3,4-epoxycyclohexyl)ethyltrimethoxysilane is the same as that of Example 1, so that the weight ratio of the prepared nano-cerium oxide is 50%.

Embodiment 3

[0026] Weigh 54g of distilled water in a 600ml beaker, adjust the pH to 4-5 with acetic acid, add 22.83g of methyl orthosilicate and 11.82g of β-(3,4-epoxycyclohexyl) ethyl dropwise under stirring conditions. The mixture of trimethoxysilane was added dropwise, and the stirring was continued for 24h. A SNAP base liquid matched with the nano-cerium oxide slurry prepared in Example 1 and Example 2 was prepared.

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PUM

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Abstract

This invention relates to a nanometer self-assembly grain film surface disposal fluid and its preparation method. The disposal fluid is composed of 1-10% positive silicon acid formic esters, 3-20% organic silanes, 0.01-2% nanometer oxide, 50-1000ppm organic inhibitor and or 1-10% inorganic inhibitor, some pH regulator and curing agent, surplus water. The preparation steps as follows: adding the prepared nanometer oxide plasma by ratio under disturbing condition to the prepared nanometer self-assembly grain film foundation fluid, and adding thinner, inhibitor and curing agent, dispersing the mixture fully by high-speed dispersion machine or magnetic beater. The character of this invention is that its environment compatibility is well, the technology is simple, and it can be used in surface preprocessing of aluminum, aluminum alloy, magnesium, magnesium alloy, zinc, zinc alloy and so on.

Description

Technical field [0001] The invention relates to a surface treatment technology, in particular to an environment-friendly chromium replacement technology-nano self-assembled particle membrane (SNAP) surface treatment liquid and a preparation method thereof. Background technique [0002] The surface treatment of chromate conversion coating is the most effective surface treatment technology for aluminum, magnesium and their alloys. The chemical conversion coating formed has excellent self-repairing ability, good corrosion resistance and coating performance. However, due to the strong toxicity and carcinogenic effects of hexavalent chromate, the aerosol and waste water generated in the surface treatment process are very harmful to the environment and organisms. In recent years, more and more countries have introduced environmental protection legislation. The use of chromate and its waste water discharge are very strictly restricted. Therefore, research and development of chromium-fre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05C23C22/06
CPCC23C2222/20
Inventor 骆素珍韩恩厚刘福春柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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