Hard anode oxidation method for aluminum and aluminum alloy

A hard anodizing, aluminum alloy technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems affecting product quality and other issues, achieve high yield, high hardness, and good promotion and application value.
CN102899700AInactive Publication Date: 2013-01-30河南平原光电有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
河南平原光电有限公司
Publication Date
2013-01-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses a hard anode oxidation method for aluminum and an aluminum alloy. According to the method, lactic acid, citric acid and an anthracene-containing self-made ??additive are adopted as an electrolyte, or only an anthracene-containing self-made ??additive is adopted as an electrolyte; installation suspension manners of the aluminum part and the aluminum alloy part during an electrolysis process are improved, and different installation suspension manners are adopted for the parts with different shapes; and the number of power feeding during the electrolysis process is increased. The oxidation film obtained by using the method has characteristics of uniform appearance and color range from gray black to black, provides advantages of high hardness, good wear resistance and good corrosion resistance compared with the ordinary sulfuric acid anode oxidation film, and further has a good technical effect.
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Description

technical field

[0001] The invention relates to an aluminum and aluminum alloy hard anodic oxidation method, which belongs to the fields of organic compound synthesis and constant current electrochemistry. Background technique

[0002] The factory has been using sulfuric acid and oxalic acid hard anodizing processes for aluminum and aluminum alloys for many years. Due to the low hardness of the sulfuric acid process, and the high ablation rate of oxalic acid parts, as high as 12%, it has always affected the improvement of product quality. Contents of the invention

[0003] In order to overcome the defects existing in the prior art, the present invention provides a method for hard anodizing of aluminum and aluminum alloys, and its technical scheme is specifically as follows:

[0004] A mixed solution of lactic acid, citric acid and an anthracene-containing self-made additive is used as the electrolyte, or only an anthracene-containing self-made additive is used as the e...

Claims

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