Process for electrolytically coloring aluminum and aluminum...

Details Process for electrolytically coloring aluminum and aluminum... Process for electrolytically coloring aluminum and aluminum...

C - Chemistry, Metallurgy

25

D

204/24.6

C25D 11/22 (2006.01)

Patent

CA 1048963

ABSTRACT OF THE DISCLOSURE Aluminum or aluminum alloy is first anodized to form an oxide film thereon. With the pores in this oxide film unsealed, the basis metal is then electrolyzed by use of alternating current at a preselected starting voltage, and this voltage is lowered at least once before completion of the electrolytic coloring of the basis metal. The electro- lytic solution in which the electrolysis is effected contains either at least three metallic salts or at least two metallic salts and a strongly reducing compound.

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