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A kind of protective agent for aluminum alloy conductive oxide film

A technology of conductive oxidation and aluminum alloy, which is applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of increasing cost, polluting the environment, and poor practicability, and achieves improved corrosion resistance, simple preparation process, low cost effect

Active Publication Date: 2021-02-23
GUIZHOU AEROSPACE NANHAI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method provided by this patent has the following disadvantages: 1. Once the sol is formulated with tetraethyl orthosilicate, it will be hydrolyzed and lose its protective effect within 2-3 days, which will cause great waste and increase the corresponding cost; 2. This patent only The silane coupling agent is emphasized. There are thousands of silane coupling agents, which are used in different ways. Many of them only work under alkaline conditions, such as KH550 and KH570, etc., which have poor practicability; 3. The closure provided by this patent The method is used for the post-treatment of the thick and non-conductive micro-arc oxidation film layer, and is not suitable for the sealing treatment of the conductive oxide layer with conductivity requirements.
This patent uses nitrogen azoles and imidazoles as organic corrosion inhibitors, which will pollute the environment and cause harm to operators; moreover, this protective agent will also affect the conductivity of the aluminum alloy conductive oxide layer to a certain extent

Method used

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  • A kind of protective agent for aluminum alloy conductive oxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An aluminum alloy conductive oxide film protective agent is composed of agent A and agent B in a volume ratio of 1:3; the agent A is made of silane coupling agent KH560, ethyl orthosilicate, and absolute ethanol , wherein the silane coupling agent accounts for 0.8% of the mass of absolute ethanol, and tetraethyl orthosilicate accounts for 15% of the mass of absolute ethanol; the B agent is composed of absolute ethanol and deionized water in a volume ratio of 2:1 production.

[0025] The preparation method of the conductive oxide layer protective agent is as follows: dissolving the silane coupling agent KH560 and ethyl orthosilicate in absolute ethanol to make Agent A; dissolving the absolute ethanol in deionized water, and adjusting its pH with sulfuric acid The value is 2 to make B agent; then the A agent and the B agent are divided according to the proportion, and they can be mixed when used.

[0026] The protective agent prepared above is applied to the sealing trea...

Embodiment 2

[0032] An aluminum alloy conductive oxide film protective agent is composed of agent A and agent B in a volume ratio of 1:2; the agent A is made of silane coupling agent KH560, ethyl orthosilicate, and absolute ethanol , wherein the silane coupling agent accounts for 1% of the mass of absolute ethanol, and tetraethyl orthosilicate accounts for 20% of the mass of absolute ethanol; the B agent is composed of absolute ethanol and deionized water in a volume ratio of 2:1 production.

[0033] The preparation method of the protective agent for the conductive oxide layer is: dissolving the silane coupling agent KH560 and ethyl orthosilicate in absolute ethanol to make agent A; dissolving the absolute ethanol in deionized water, and adjusting its pH with hydrochloric acid The value is 3 to make B agent; then A agent and B agent are divided into packages according to the proportion, and they can be mixed when used.

[0034] Apply the protective agent prepared above to the sealing trea...

Embodiment 3

[0040] An aluminum alloy conductive oxide film protective agent is composed of agent A and agent B in a volume ratio of 1:3; the agent A is made of silane coupling agent KH560, ethyl orthosilicate, and absolute ethanol , wherein the silane coupling agent accounts for 2% of the mass of absolute ethanol, and tetraethyl orthosilicate accounts for 30% of the mass of absolute ethanol; the B agent is composed of absolute ethanol and deionized water in a volume ratio of 3:1 production.

[0041] The preparation method of the conductive oxide layer protective agent is as follows: dissolving the silane coupling agent KH560 and ethyl orthosilicate in absolute ethanol to make Agent A; dissolving the absolute ethanol in deionized water, and adjusting its pH with sulfuric acid When the value is 4, make B agent; then mix A agent and B agent to dissolve, stir thoroughly, and use after standing for half an hour.

[0042] Apply the protective agent prepared above to the sealing treatment after t...

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Abstract

The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum alloy conductive oxide film protective agent. The protective agent is composed of A agent and B agent; the A agent is made of silane coupling agent, tetraethyl orthosilicate, absolute alcohol; the B agent is made of absolute alcohol and deionized water to make. The protective agent provided by the invention has low cost and simple preparation process; the protective agent does not contain environmental pollutants such as heavy metals, and is energy-saving and environmentally friendly; the protective agent only forms a protective layer of 0.1-1 μm on the surface of the aluminum alloy conductive oxide layer, which can effectively Improve the corrosion resistance of aluminum alloy conductive oxide film without affecting the conductivity of aluminum alloy products.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum alloy conductive oxide film protective agent. Background technique [0002] Aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is used in aviation, aerospace, automobiles, machinery manufacturing, and ships It has been widely used in the chemical industry and the chemical industry, and its usage is second only to steel. The welding of aluminum alloy instead of steel plate material can reduce the structural weight by more than 50%. The fuselage, skin, compressor, etc. of the aircraft are often made of aluminum alloy to reduce the weight. However, the high chemical activity of aluminum leads to poor corrosion resistance; under c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/24
CPCC25D11/246
Inventor 李海东杨雪莹王栋国刘文贵
Owner GUIZHOU AEROSPACE NANHAI SCI & TECH