Method of forming chromate conversion coatings on aluminum surfa

Details Method of forming chromate conversion coatings on aluminum surfa Method of forming chromate conversion coatings on aluminum surfa

1983-04-11

1985-07-30

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 62, 148 627, C23F 726, C23F 710

Patent

active

045319782

ABSTRACT:
A method for forming a chromate conversion coating on aluminum surfaces is described in which an aluminum surface is immersed in an aqueous acidic solution containing hexavalent chromium and the aluminum surface and the solution are subjected to ultrasonic energy thus reducing the need for including environmentally harmful accelerator components in said solution.

REFERENCES:
patent: 4328047 (1982-05-01), Dalton
patent: 4353934 (1982-10-01), Nakashima

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