Non-carcinogenic, non-polluting sulfuric acid etchants for prepa

Details Non-carcinogenic, non-polluting sulfuric acid etchants for prepa Non-carcinogenic, non-polluting sulfuric acid etchants for prepa

1986-02-24

1987-06-02

Terapane, John F.

Compositions

Etching or brightening compositions

Inorganic acid containing

252142, 156629, 156630, 156656, 156665, 156330, 427307, 427309, 134 3, 134 41, C09K 1304, B05D 310, C23F 120, C23F 144

Patent

active

H00002844

ABSTRACT:
The invention provides a process and composition of low toxicity for prepng aluminum surfaces for adhesive bonding. According to the invention non-carcinogenic, non-polluting soluble metal salts generally, other than ferric sulfate disclosed in U.S. Pat. No. 4,212,701, when added in an effective amount to sulfuric acid, improve the adhesive bonding to aluminum when the aluminum is treated with such salt-sulfuric acid etchants prior to adhesive bonding.

REFERENCES:
patent: 4395305 (1983-07-01), Whitman

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