Surface treatment of aluminum materials

Details Surface treatment of aluminum materials Surface treatment of aluminum materials

1983-11-07

1985-03-12

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 62, 148 627, 148 624, C23F 708, C23F 726

Patent

active

045043248

ABSTRACT:
A method for the treatment of aluminum or aluminum alloy material comprising treating the material in a series of alkaline baths and a series of acid baths connected in series in regular order, said alkaline baths having an alkali concentration gradient continually decreasing from higher to lower values, the alkali concentration in the last stage bath being controlled to a defined level, and said acid baths having an acid concentration gradient continually decreasing from higher to lower values and the last stage bath being of pure water. The aluminum or aluminum alloy surface can be processed uniformly and economically by the instant process.

REFERENCES:
patent: 2137988 (1938-11-01), Hempel
patent: 2650875 (1953-09-01), Dvorkovitz
patent: 2883311 (1959-08-01), Halpert
patent: 2948392 (1960-08-01), Young
patent: 3066055 (1962-11-01), Pimbley

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