Method of producing tarnish resistant copper and copper alloys a

Details Method of producing tarnish resistant copper and copper alloys a Method of producing tarnish resistant copper and copper alloys a

1973-03-15

1976-03-02

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

96 362, 148 615R, 148 616, 156 8, 156 18, 156316, 156319, 156 3, 161191, 161213, H05K 306, G03C 500

Patent

active

039416283

ABSTRACT:
The instant invention comprises providing copper or a copper alloy which has on its surface a uniform glassy like and substantially pore free coating of copper phosphate, rinsing the coated material for at least two seconds in water at a pH of from 4.9 to 6.3, at a temperature of 90.degree.C to the boiling point and drying.

REFERENCES:
patent: 3455751 (1969-07-01), Frantzen
patent: 3466207 (1969-09-01), Vincent
patent: 3620933 (1971-11-01), Grunwald et al.
patent: 3677828 (1972-07-01), Caule
patent: 3716427 (1973-02-01), Caule
patent: 3833433 (1974-09-01), Caule
Photopolymer Resist System - Dupont Brochure A-60571 5/14/68.

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