Coloring methods for aluminum and aluminum alloys

Details Coloring methods for aluminum and aluminum alloys Coloring methods for aluminum and aluminum alloys

1975-01-23

1977-05-17

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204 35N, 204 38E, 204 42, 204 58, C25D 1122, C25D 1306

Patent

active

040240398

ABSTRACT:
A method for coloring aluminum and aluminum alloys comprising passing an alternating current from the article of aluminum or aluminum alloys having an oxidized film thereon through an aqueous solution of one or more salts of one or more metals of Group VIII of the periodic table, and thereafter passing a direct current through an aqueous solution of electrolyte utilizing the aluminum material as the anode wherein said solution may have a conductivity of more than 10 .mu..OMEGA..sup.-.sup.1 cm.sup.-.sup.1, be the same as the one used when employing the alternating current or contain a water-soluble resin. The electrolyte is free of added acid.

REFERENCES:
patent: 3546016 (1970-12-01), Pavelich et al.
patent: 3664932 (1972-05-01), Patrie
patent: 3672966 (1972-06-01), Geisler et al.
patent: 3711313 (1973-01-01), Nagano et al.
patent: 3795590 (1974-03-01), Patrie

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