Compositions – Etching or brightening compositions – Inorganic acid containing
Patent
1984-04-27
1985-01-29
Powell, William A.
Compositions
Etching or brightening compositions
Inorganic acid containing
156665, 156903, 252 793, 252 794, C09K 1304, C09K 1308, C09K 1306, C23F 100
Patent
active
044964650
ABSTRACT:
This invention teaches the development of a chemical reagent useful as an aluminum brightening bath. The reagent's composition is primarily wet-process phosphoric acid to which has been added small quantities of nitric acid, copper, and optionally traces of several other substances. The reagent does not require expensive removal of the natural impurities found in wet-process phosphoric acid.
REFERENCES:
patent: 2729551 (1956-01-01), Cohn
patent: 3202612 (1965-08-01), Nelson
patent: 3410803 (1968-11-01), Hoover
Clemens Donald F.
King Taylor
Whitehurst Brooks M.
Whitehurst Garnett B.
Encee Chemical Sales, Inc.
Powell William A.
Roberts, Jr. John S.
Whitehurst Associates Inc.
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