Process for protecting a silver or silver-coated part

Details Process for protecting a silver or silver-coated part Process for protecting a silver or silver-coated part

1995-11-13

1997-03-25

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428673, 428674, 428935, 205241, 205176, B32B 1500, C25D 358, C25D 1138

Patent

active

056143273

ABSTRACT:
A process for protecting, especially against corrosion, a silver or silver-coated part, wherein a Cu--Sn alloy comprising from 53 to 75% copper and from 25 to 47% tin and optionally comprising up to 10% zinc is deposited on the said part over a thickness of less than 0.01 .mu.m. Another aspect of the invention is a silver or silver-coated part additionally having a protective coating formed from a Cu--Sn or Cu--Sn--Zn alloy, with a thickness of less than 0.01 .mu.m.

REFERENCES:
patent: 1779809 (1930-10-01), Gray et al.
patent: 1850997 (1932-03-01), Assmann
patent: 1947180 (1934-02-01), Bart
patent: 2435967 (1948-02-01), Jernstedt
patent: 2436316 (1948-02-01), Lum et al.
patent: 2530967 (1950-11-01), Jernstedt
patent: 3419364 (1968-12-01), Pryor et al.
patent: 3687713 (1972-08-01), Adams
patent: 3778237 (1973-12-01), Shapiro et al.
patent: 4496438 (1985-01-01), Helton et al.
J.B. Mohler, "Copper-Tin-Zinc Plating", Metal Finishing, Oct. 1955, p. 47.
W.H. Safranek et al., "Copper-Tin Alloy Plating", Plating, vol. 41, No. 10, Oct. 1954, pp. 1159-1164, 1169-1170.

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