Method of forming a colored and oxide film on aluminum and alumi

Details Method of forming a colored and oxide film on aluminum and alumi Method of forming a colored and oxide film on aluminum and alumi

1977-09-29

1978-07-11

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

C25D 1108, C25D 1110

Patent

active

041000412

ABSTRACT:
A method in which aluminum and aluminum alloys are subjected to anodic oxidizing treatment by use of a novel electrolyte to form a good colored and oxide film on the surface thereof. The electrolyte comprises an organic acid solution resulting from the sulfonation of fumaric acid (hereinafter tentatively referred to as the sulfofumaric acid) as a main liquid, into which either oxalic acid as an organic acid, or sulfuric acid or metal sulfate as the inorganic acid are added.

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