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

1975-02-28

1976-12-14

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

C25D 1108, C25D 1110, C25D 1114

Patent

active

039974120

ABSTRACT:
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.degree. to 40.degree. C, whereby the oxide film is colored in color tone from bronze to silver.

REFERENCES:
patent: 3836439 (1974-09-01), Ikegaya et al.
"The Surface Treatment & Finishing of Al" by Wernick et al., 1964, p. 272.
"Electroplating Engineering Handbook," 2nd Ed. by A. K. Graham, 1962, p. 438.

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