Method of rust-preventing for copper and copper alloy

Details Method of rust-preventing for copper and copper alloy Method of rust-preventing for copper and copper alloy

1974-06-24

1976-01-20

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 315, 106 14, 21 25R, 252390, C23F 1100

Patent

active

039335313

ABSTRACT:
Copper and copper alloys are prevented from rust by surface-treating the copper and copper alloys with at least one compound selected from the class consisting of alkylimidazoles represented by the following formula: ##SPC1##
Wherein R is a long straight chain alkyl group of 5-21 carbon atoms and R' is hydrogen atom or a lower alkyl group, and their acid addition salts. The compound is used as it is, or in a solution, by dipping, spraying, coating or directly contacting with copper or copper alloy. The surface -treated copper and copper alloy can well withstand tarnishing in an atmosphere containing sulfur compound gas.

REFERENCES:
patent: 2468163 (1948-01-01), Blair, Jr. et al.
patent: 2618608 (1952-09-01), Schaffer
patent: 3140974 (1964-07-01), Pera et al.
patent: 3295917 (1967-01-01), Cotton

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