Copper and copper alloy coating

Details Copper and copper alloy coating Copper and copper alloy coating

1982-02-25

1984-06-05

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23F 712

Patent

active

044526504

ABSTRACT:
Copper or copper alloy sheet or foil displaying excellent solderability and high resistance to tarnish is prepared by the provision over its surface of a coating containing a copper salt of an organophosphonic acid. To form the coating, the sheet or foil is immersed for a short time in an aqueous solution containing a phosphonic acid, rinsed and dried, the treatment being combined with or preceded by oxidation of the sheet surface.

REFERENCES:
patent: 2001753 (1935-05-01), Tanner et al.
patent: 3224908 (1965-12-01), Duch et al.
patent: 3293088 (1966-12-01), Herbst et al.
patent: 3431217 (1969-03-01), Hwa
patent: 3510436 (1970-05-01), Silverstein et al.
patent: 3630790 (1971-12-01), Schmidt et al.
patent: 3634146 (1972-01-01), Wystrach et al.
patent: 3677828 (1972-07-01), Caule
patent: 3837929 (1974-09-01), Caule

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