Process for forming an anodized film over the surface of aluminu

Details Process for forming an anodized film over the surface of aluminu Process for forming an anodized film over the surface of aluminu

1979-04-25

1981-02-24

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 1108, C25D 1110, C25D 1114

Patent

active

042526205

ABSTRACT:
Anodized films having an aesthetic value are formed over the surface of aluminum or aluminum alloy substrates by anodizing the substrate in an electrolyte solution containing 50-60% of sulfuric acid and oxalic acid or nickel sulfate, at a bath temperature of 18.degree. to 30.degree. C. and a current density of 1 to 10 A/dm.sup.2.
The oxide film formed by this method has a porcelain-like texture or feel or the appearance of a meshwork thereof or a grainy texture resembling wood, leather or sand, depending upon the nature of the base or substrate metal and the anodizing conditions employed.

REFERENCES:
patent: 2963409 (1960-12-01), Ramirez

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