Non-chromated alkaline etching bath and etching process for alum

Details Non-chromated alkaline etching bath and etching process for alum Non-chromated alkaline etching bath and etching process for alum

1974-03-01

1976-05-18

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

2041415, 252 795, C23F 100

Patent

active

039575535

ABSTRACT:
Alkaline etching baths for aluminum are claimed in which oxidizing agents at low concentration replace chromates and fluorides in the control of galvanizing. Etching processes using these new baths are also disclosed and claimed.

REFERENCES:
patent: 2975040 (1961-03-01), Elliott
patent: 3321389 (1967-05-01), Anderson
patent: 3627654 (1971-12-01), Petit et al.
patent: 3802973 (1974-04-01), Smith
patent: 3810797 (1974-05-01), Schaffstall et al.

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