ANODIZING METHOD OF ALUMINUM

In an anodizing method of aluminum, a tubular object made of aluminum or aluminum alloy is located between a pair of cathodes in an electrolysis solution, and a subsidiary cathode is inserted into the tubular object. The tubular object is anodized in the electrolysis solution to form an anodic oxide...

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Bibliographic Details
Main Authors AMAKUSA SEIJI, UCHIDA TOMOYA
Format Patent
LanguageEnglish
Published 13.03.2014
Subjects
APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Summary:In an anodizing method of aluminum, a tubular object made of aluminum or aluminum alloy is located between a pair of cathodes in an electrolysis solution, and a subsidiary cathode is inserted into the tubular object. The tubular object is anodized in the electrolysis solution to form an anodic oxide coating on an inner surface of the tubular object and on an outer surface of the tubular object. Accordingly, the anodic oxide coating can be formed easily not only on the outer surface of the tubular object but also on the inner surface of the tubular object. Therefore, a thickness difference of the anodic oxide coating between on the outer surface of the tubular object and on the inner surface of the tubular object can be reduced.
Bibliography:Application Number: US201314021345