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

1973-03-26

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, H05K 306

Patent

active

039416275

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 at least 8.0, at a temperature of 90.degree.C to the boiling point and drying.

REFERENCES:
patent: 2120212 (1938-06-01), Curtin
patent: 3455751 (1969-07-01), Frantzen
patent: 3466207 (1969-09-01), Vincent et al.
patent: 3620933 (1971-11-01), Grunwald et al.
Photopolymer Resist System - Dupont Brochure A-60571, 5/14/68.

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