Method for sealing an aluminum oxide film

Details Method for sealing an aluminum oxide film Method for sealing an aluminum oxide film

1982-03-19

1985-03-12

Morgenstern, Norman

Metal treatment

Compositions

Heat treating

148 614R, 148 627, C23F 706

Patent

active

045043256

ABSTRACT:
The corrosion resistance and coating adhesion characteristics of an aluminum oxide film produced by anodization is improved by contacting the film with a dilute aqueous solution of an oxidizing composition, for example chromic acid, and a pH altering substance that maintains the pH of the solution between 3.0 and 5.0. Exemplary pH altering compositions are respectively chromic acid and sodium or magnesium chromate.

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Chemical Abstract, vol. 67, 1967, 46509j.

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