Wet-process phosphoric acid brightening reagent for aluminum

Details Wet-process phosphoric acid brightening reagent for aluminum Wet-process phosphoric acid brightening reagent for aluminum

1984-04-27

1985-01-29

Powell, William A.

Compositions

Etching or brightening compositions

Inorganic acid containing

156665, 156903, 252 792, 252 794, 252142, C09K 1304, C09K 1308, C09K 1306, C23F 100

Patent

active

044964668

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

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