Sealing agent for micro-arc oxidation film

A micro-arc oxidation and sealant technology, applied in anodizing, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve the problems of no more than 1 μm, pollution, unsatisfactory application effect, etc., and achieve good acid resistance and good permeability. , good antifouling effect

Inactive Publication Date: 2013-12-18
NANJING HAORANG ENVIRONMENT SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are unsatisfactory for the application of electronic product casings such as notebooks and mobile phone casings. After use, the surface of the product will lose the metallic texture after micro-arc oxidation. If no treatment is done, the micro-arc oxidation film may Loss of usability and/or aest

Method used

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  • Sealing agent for micro-arc oxidation film
  • Sealing agent for micro-arc oxidation film

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] Preparation of sealing agent: take 5 parts of deionized water, add 90 parts of ethanol, stir for 2-3 minutes, then add 4 parts of γ-mercaptopropyl triethoxysilane and stir for 3-5 minutes, then add 1 part of WA-610, drop Add 40% glacial acetic acid to adjust the pH value to 9.5, stir for 5 min, and use after standing for 24 h.

[0021] A 6063 aluminum alloy specimen with a size of 100mm×100mm×2mm was selected, treated by micro-arc oxidation for 20min (the average film thickness was 15μm), then washed with deionized water, dried at 80-100°C for 20min, and then immersed in the above sealing agent. 2-3min, take it out, drain the residual liquid and put it in an oven to cure at 150℃ for 30min.

[0022] The product performance was tested and the following conclusions were drawn.

[0023] (1) Corrosion resistance: figure 1 It is the surface state of the 6063 aluminum alloy micro-arc oxidation specimen when it is not sealed and the photos of the salt spra...

Example Embodiment

[0032] Example 2

[0033] Preparation of sealing agent: take 6.5 parts of deionized water, add 90 parts of methanol, stir for 2-3min, then add 3 parts of γ-mercaptopropyltrimethoxysilane and stir for 3-5min, then add 0.5 part of WA-610 and stir for 1- 2min, add 40% glacial acetic acid dropwise to adjust the pH value to 4.5, and use after standing for 24h.

[0034] After micro-arc oxidation treatment of 5083 aluminum alloy specimens with a size of 100mm×50mm×2mm (the average film thickness is 12μm), they were cleaned with deionized water, dried at 80-100 ℃ for 20 minutes, and then immersed in the above sealing agent for 2-3 minutes. , take it out, drain the residual liquid and place it in an oven at 130°C for 40min curing.

[0035] The relevant test of the treated product is carried out according to Example 1. There is no sensory change in the appearance of the micro-arc oxide film before and after sealing; the salt spray test level exceeds 1000h; the antifouling test meets t...

Example Embodiment

[0036] Example 3

[0037] Preparation of blocking agent: take 8 parts of deionized water, add 86 parts of methanol, stir for 2-3min, then add 3 parts of γ-mercaptopropyltrimethoxysilane and 2 parts of γ-glycidyl ether oxypropyltrimethoxysilane and Stir for 3-5 minutes, then add 1 part of WA-610, stir for 1-2 minutes, dropwise add 40% glacial acetic acid to adjust the pH to 4.5, and use it after standing for 24 hours.

[0038] After micro-arc oxidation treatment of ZL102 aluminum alloy castings with a diameter of 100mm×5mm for 25min (film thickness of 20μm), rinse with deionized water, dry at 80-100℃ for 20min, then immerse in the above sealing agent for 2-3min, take out and drain The residual liquid was then placed in an oven at 130°C for curing for 40min.

[0039] The relevant test of the treated product is carried out according to Example 1. There is no sensory change in the appearance of the micro-arc oxide film before and after sealing; the salt spray test level exceeds ...

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Abstract

The invention discloses a sealing agent for a micro-arc oxidation film. Alcohols solvents and little additives are added to prepare water-soluble liquid on the basis of a silane coupling agent, and the sealing agent is used for generating a nanometer protective layer on the surface of the oxidation film, so that discharge micropores of the micro-arc oxidation film can be effectively sealed and good corrosion resistance is achieved; the sealed surface of the micro-arc oxidation film has a good hydrophobic effect, is anti-scrubbing and anti-pollution, is matte, transparent and traceless, and has no sensory difference in appearance compared with that before micropore sealing.

Description

technical field [0001] The invention belongs to the field of surface treatment of metal materials, and in particular relates to a sealing agent for micro-arc oxidation film, its preparation method and application. Background technique [0002] Lightweight is an important development direction in the field of materials and machinery. "Substituting aluminum for steel and magnesium for plastic" is an important way to achieve lightweight. At this stage, aluminum, magnesium and their alloys have been widely used in the fields of machinery, electric power, ships, aerospace and other fields, but the corrosion protection of these light metals is insufficient, which hinders their further application. [0003] The development of micro-arc oxidation technology has brought new opportunities for the application of light metals such as aluminum, magnesium and their alloys. Micro-arc oxidation technology can form a dense ceramic oxide film on the surface of light metals, thereby greatly i...

Claims

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Application Information

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IPC IPC(8): C25D11/02C25D11/24
Inventor 房爱存蒋百铃赵健房昊炜
Owner NANJING HAORANG ENVIRONMENT SCI & TECH
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