Electrical contact surface coating

Details Electrical contact surface coating Electrical contact surface coating

1988-06-14

1990-01-23

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

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

204 446, 428672, C25D 512, H01R 1303

Patent

active

048957712

ABSTRACT:
A surface for providing an electrically conductive surface coating on an electrical contact body. The process resulting in such a coating comprises the steps of depositing upon the body surface in sequence, (a) a nickel layer, (b) a first gold layer, (c) a palladium
ickel alloy layer which may be an alloy containing nickel up to a proportion of 50% by weight, and (d) a second gold layer. All the layers may be deposited by an electrodeposition process.
The resulting surface coating has excellent corrosion and wear resistance properties.

REFERENCES:
patent: 4699697 (1987-10-01), Higuchi
patent: 4743346 (1988-05-01), Graham et al.
Witlaw, K. J.; "An Extended Study of Acid Gold and . . . ", Metals Abstract 85(4):58-343, 1985.
Simanova et al.; "Replacement of Gold in Technical . . . ", Chem. Ab. CA 107(6):44454h 1987.
Witlaw, Keith; "Palladium-Nickel Deposits Instead of . . . ", Chem. Ab. CA 102(24):213318w 1985.
Dennis et al; "Nickel and Chromium Plating", Halsted Press, 1973 p. 79.

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