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Three-proofing treatment process method

A treatment process, aluminum alloy technology, applied in the direction of pretreatment surface, anti-corrosion coating, anti-fouling/underwater coating, etc. First-class problems, to achieve the effect of improving environmental adaptability, low cost, and convenient operation

Active Publication Date: 2018-04-20
GUIZHOU AEROSPACE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above treatment methods are difficult to take into account the triple or multiple performances of anti-moisture, anti-mold and anti-salt spray corrosion. The use environment of electronic products varies, so more effective measures must be taken to improve its multiple protection performance, thereby improving the environment of electronic products Adaptability, so that electronic products can work reliably in harsh environments such as humidity, heat, salt spray and mold

Method used

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Embodiment 1

[0049] A three-proof treatment process method, comprising the following steps:

[0050] 1. Conduct chemical conductive oxidation on aluminum alloy parts

[0051] Before chemical conductive oxidation, first put the aluminum alloy parts into the degreasing solution, soak for 8 minutes at 50°C, the degreasing solution is composed of: 800g of water, 30g of sodium carbonate, and 30g of sodium phosphate, and then wash it with secondary flowing water , put the aluminum alloy parts into the mixed acid, and soak at room temperature for 8 seconds for bright corrosion. The formula of the mixed acid solution is hydrofluoric acid: nitric acid: water = 1:3:1 (volume ratio), and finally conduct chemical conductivity oxidation , put the aluminum alloy parts into the chemically conductive oxidation solution, and soak for 2 minutes at a temperature of 25°C. After conductive oxidation, wash with secondary running water, then soak the aluminum alloy parts in distilled water at 25°C for 1min, the...

Embodiment 2

[0066] A three-proof treatment process method, comprising the following steps:

[0067] 1. Conduct chemical conductive oxidation on aluminum alloy parts

[0068] Before chemical conductive oxidation, first put the aluminum alloy parts into the degreasing solution and soak for 9 minutes at 55°C. The composition of the degreasing solution is: 1000g of water, 40g of sodium carbonate, and 40g of sodium phosphate; then wash it with secondary flowing water , put the aluminum alloy parts into the mixed acid, soak for 11 seconds at room temperature for bright corrosion, the mixed acid solution formula is hydrofluoric acid: nitric acid: water = 1:3:1 (volume ratio); finally carry out chemical conductive oxidation , put the aluminum alloy parts into the chemically conductive oxidation solution, and soak for 2.5 minutes at a temperature of 30°C. The composition of the chemically conductive oxidation solution is: distilled water 1000g, chromic anhydride 3.7g, sodium dichromate 3.3g, sodiu...

Embodiment 3

[0083] A three-proof treatment process method, comprising the following steps:

[0084] 1. Conduct chemical conductive oxidation on aluminum alloy parts

[0085] Before chemical conduction oxidation, put the aluminum alloy parts into the degreasing solution and soak for 10 minutes at a temperature of 60°C. The degreasing solution consists of: 1200g of water, 50g of sodium carbonate, and 50g of sodium phosphate. Then wash it with secondary running water, put the aluminum alloy parts into the mixed acid, soak for 15 seconds at room temperature for bright corrosion, the mixed acid solution formula is hydrofluoric acid: nitric acid: water = 1:3:1 (volume ratio ); finally carry out chemical conduction oxidation, put the aluminum alloy parts into the chemical conduction oxidation solution, soak for 3 minutes at a temperature of 35°C, the composition of the chemical conduction oxidation solution is: distilled water 1200g, chromic anhydride 4g, sodium dichromate 3.5g, Sodium fluoride...

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Abstract

The invention provides a three-proofing treatment process method and belongs to the technical field of electronic device treatment. According to the combination treatment method, firstly, the outer surface of an aluminum alloy piece is subjected to chemical electric conduction oxidation, then spraying of primer, scrape coating of putty, and spraying of three-proofing enamel are conducted, and finally, varnish is sprayed to the outer surface of the aluminum alloy piece. The good grounding requirement of electronic products is met, meanwhile, the three-proofing performance of the aluminum alloypiece is greatly improved, and thus the environmental adaptability of the electronic products is improved so that the electronic products can reliably work under the severe environments such as dampness, heat, salt mist and mould; and the method is simple in process, convenient and quick to operate, low in cost, stable and reliable.

Description

technical field [0001] The invention relates to the technical field of electronic device processing, in particular to a three-proof processing method. Background technique [0002] The three defenses of electronic products refer to anti-moisture, anti-mold and anti-salt spray corrosion. It is an important indicator to measure the environmental adaptability of products. The reliability of electronic products has a great relationship with environmental factors. In the harsh environment of high temperature, high humidity and high salt spray, whether the product can work reliably depends to a large extent on its resistance to heat and humidity, salt spray and mold. adaptability. [0003] Aluminum alloy has a series of advantages such as low density, high specific strength, good processing technology and low cost, and is widely used in the fields of aviation, aerospace, nuclear industry and weapon industry. Especially because of its good heat dissipation, aluminum alloys are of...

Claims

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Application Information

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IPC IPC(8): B05D7/00B05D5/00B05D3/10B05D7/14C09D5/08C09D5/14C09D127/24C09D163/10C09D175/04
CPCB05D3/102B05D5/00B05D7/14B05D7/574B05D2503/00B05D2504/00C09D5/08C09D5/14C09D127/24C09D163/10C09D175/04B05D2420/01B05D2420/02B05D2420/05
Inventor 刘小玲
Owner GUIZHOU AEROSPACE ELECTRONICS TECH
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