Process for electrolytically coloring aluminum and aluminum allo

Details Process for electrolytically coloring aluminum and aluminum allo Process for electrolytically coloring aluminum and aluminum allo

1976-03-03

1977-08-16

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 35N, 204 58, C25D 1122

Patent

active

040424693

ABSTRACT:
Aluminum or aluminum alloy is first anodized to form an oxide film thereon. The anodized basis metal is electrolyzed by use of alternating current in an electrolytic solution which is prepared by adding formaldehyde, usually as formalin, and a thiosulfate to an acid solution of stannous sulfate. The acid solution of stannous sulfate can be prepared by dissolving stannous sulfate in an aqueous solution of sulfuric acid, sulfamic acid, tartaric acid or the like.

REFERENCES:
patent: 3795590 (1974-03-01), Patrie

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