Cleaning composition for copper and copper alloys and method of

Details Cleaning composition for copper and copper alloys and method of Cleaning composition for copper and copper alloys and method of

1989-12-22

1991-05-28

Powell, William A.

Compositions

Etching or brightening compositions

Inorganic acid containing

134 3, 252 794, 252142, 156656, 156666, C09K 1304, C23G 102, B44C 122, C23F 100

Patent

active

050192884

ABSTRACT:
An acidic solution for use as a cleaning composition for copper and copper alloys includes a solution of from about 1-20 weight percent hydrochloric acid and approximately 80-99 weight percent of an aqueous hydrochloric acid-based composition which has a pH of less than about 1.0 yet is substantially non-reactive with compounds having low oxidative states, including human skin tissue.

REFERENCES:
patent: 4181622 (1980-01-01), Gavin
patent: 4199469 (1980-04-01), Walzer
patent: 4250048 (1981-02-01), Levesks
patent: 4477364 (1984-10-01), Garcia
patent: 4581102 (1986-04-01), Brock

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