Process for electrolytic coloration of anodized aluminium

Details Process for electrolytic coloration of anodized aluminium Process for electrolytic coloration of anodized aluminium

1977-06-06

1980-10-07

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204 35N, 204 58, 204DIG8, 204DIG9, 204228, C25D 1122

Patent

active

042266807

ABSTRACT:
A continuous length of aluminum is anodized during passage through an anodizing electrolyte and then colored during passage through an inorganic coloring electrolyte, in which a counterelectrode is immersed. In the electrolytic coloring stage alternating current with a superimposed D.C. compound is preferably passed between the anodized aluminum and the counterelectrode when the electrolyte is appropriate for such treatment. The alternating current circuit for the electrolytic coloring stage is preferably completed via an electrode immersed in the anodizing electrolyte at a position facing substantially unanodized aluminum so as to effect a liquid contact.

REFERENCES:
patent: 4014758 (1977-03-01), Kawai et al.

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