Solutions for cleaning surfaces of copper and its alloys

Details Solutions for cleaning surfaces of copper and its alloys Solutions for cleaning surfaces of copper and its alloys

1975-12-08

1977-09-27

Pitlick, Harris A.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

134 3, 134 41, 252102, 252142, 252548, 423272, C11D 708, C11D 718, C11D 732

Patent

active

040510573

ABSTRACT:
A solution for pickling copper and its alloys contains one or more mineral acids, such as sulphuric acid or phosphoric acid, in combination with hydrogen peroxide and a hydroxy acid, such as citric acid or gluconic acid, together with a nitrogen combination of the type substituted triazole and/or a tertiary amine of the general formula ##STR1## in which R is an aliphatic carbon chain containing less than 24 carbon atoms and the sum of n.sub.1 and n.sub.2 is less than 30.

REFERENCES:
patent: 2318559 (1943-05-01), Percival
patent: 2428804 (1947-10-01), Terry et al.
patent: 2894905 (1959-07-01), Bernard
patent: 3345217 (1967-10-01), Wollgien et al.
patent: 3537895 (1970-11-01), Lancy
patent: 3556883 (1971-01-01), Naito et al.
patent: 3770530 (1973-11-01), Fujimoto
patent: 3773577 (1973-11-01), Shibasaki et al.
patent: 3809588 (1974-05-01), Zeblisky
patent: 3869401 (1975-03-01), Ernst
patent: 3905907 (1975-09-01), Shiga
patent: 3948703 (1976-04-01), Kushibe

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