Method for color-anodizing aluminum and aluminum alloys in a sho

Details Method for color-anodizing aluminum and aluminum alloys in a sho Method for color-anodizing aluminum and aluminum alloys in a sho

1975-06-18

1976-10-12

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

C25D 1110

Patent

active

039856291

ABSTRACT:
A method for color-anodizing (hereinafter referred merely to "coloring") aluminum and aluminum alloys in a short period of time. The method comprises adding sulfosalicylic acid or sulfophthalic acid and along with sulfuric acid to a solution, of which the main ingredient is citric acid, succinic acid, to form an electrolyte and effecting anodic oxidation on surfaces of aluminum and aluminum alloys with the electrolyte to form a colored oxide coating.

REFERENCES:
patent: 3265597 (1966-08-01), Neunzig et al.
patent: 3280013 (1966-10-01), Economy
patent: 3328274 (1967-06-01), Bushey et al.
patent: 3384561 (1968-05-01), Michelson et al.
patent: 3425918 (1969-02-01), Zweifel et al.

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