Process and composition of low toxicity for preparing aluminum s

Details Process and composition of low toxicity for preparing aluminum s Process and composition of low toxicity for preparing aluminum s

1979-05-09

1980-07-15

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156 64, 1563069, 156629, 252 792, C23F 100

Patent

active

042127017

ABSTRACT:
The invention provides a process and composition of low toxicity for prepng aluminum surfaces for adhesive bonding. The process involves treating the aluminum with an etching composition composed of sulfuric acid, ferric sulfate and water. The invention eliminates the toxicity and pollution problems associated with the conventional chromate-type etching baths, reduces the contamination of the work place and environment to acceptable levels, and produces aluminum surfaces, which when adhesively bonded yield joints comparable in strength to those obtained by use of the conventional chromate-type etchant bath.

REFERENCES:
patent: 2945778 (1960-07-01), Lipinski
patent: 3140203 (1964-07-01), Grunwald
patent: 3785866 (1974-01-01), Frey
patent: 4100015 (1978-07-01), Russell

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