Method of forming oxide film on aluminum or aluminum alloy

Details Method of forming oxide film on aluminum or aluminum alloy Method of forming oxide film on aluminum or aluminum alloy

C - Chemistry, Metallurgy

25

D

204/24.8

C25D 11/14 (2006.01)

Patent

CA 1050473

ABSTRACT OF THE DISCLOSURE A method of forming an oxide film on the surface of an aluminum material by anodizing the aluminum material in an aqueous solution containing 0.5 to 10% by weight of oxalic acid and 0.05 to 1.0% by weight of sulfuric acid, in which either an electrolyzing voltage or the temperature of the aqueous solution is controlled in the range of 5 to 150V or 0 to 40°C, whereby the oxide film is colored in color tone from bronze to silver.

222765

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