Method for producing colored anodic oxide films on aluminum base

Details Method for producing colored anodic oxide films on aluminum base Method for producing colored anodic oxide films on aluminum base

1977-09-22

1979-04-03

Edmundson, F. C.

Chemistry: electrical and wave energy

Processes and products

204 58, 204DIG9, C25D 1114, C25D 1122, C25D 1108

Patent

active

041475984

ABSTRACT:
Method for producing colored anodic oxide films on aluminum-based alloy materials comprising steps of subjecting the material having an oxide film thereon to a coloring electrolytic treatment in a bath of electrolyte containing water soluble nickel salt and boric acid. The material is applied with alternating voltage pulses having negative pulse duration which is the same as or greater than duration of positive voltage pulse.

REFERENCES:
patent: 3704210 (1972-11-01), Patrie
patent: 3892636 (1975-07-01), Kaneda et al.
patent: 3915813 (1975-10-01), Abe et al.
patent: 3929593 (1975-12-01), Sugiyama et al.
patent: 3977948 (1976-08-01), Martinez

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