Compositions and processes for producing chromium conversion coa

Details Compositions and processes for producing chromium conversion coa Compositions and processes for producing chromium conversion coa

1977-05-03

1979-02-27

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

C23F 726

Patent

active

041417585

ABSTRACT:
In a process for producing a chromium protective coating on a zinc/iron alloy surface the surface has applied thereto an aqueous composition including chromium, perchlorate and fluoride ions with the chromium ion being the only metal ion present before application to the surface.

REFERENCES:
patent: 2786002 (1957-03-01), Ambler et al.
patent: 3857739 (1974-12-01), Prust et al.

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