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

1976-03-16

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

148 615R, 148 616, 156319, 428458, 428469, C23F 712

Patent

active

039444490

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 2 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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