Steel component with an electroplated anti-corrosive coating and

Details Steel component with an electroplated anti-corrosive coating and Steel component with an electroplated anti-corrosive coating and

1995-02-09

1997-09-23

Gorgos, Kathryn L.

Stock material or miscellaneous articles

All metal or with adjacent metals

Microscopic interfacial wave or roughness

205 50, 205 95, 205151, 205245, 205246, 428659, 428687, C25D 710, B32B 1518, F16C 1900

Patent

active

056702655

ABSTRACT:
A steel component is provided on its surface with an electroplated anti-corrosive coating of a metallic material and has a hardness of at least 650 HV, the anti-corrosive coating being thinner than the surface roughness which the hardened component had before the application of the protective coating. Advantageously, the component is a rolling bearing component with a surface roughness R.sub.z of 0.3 to 9.0 .mu.m and a coating thickness of 0.1 to 3.0 .mu.m. Preferably, the anti-corrosive coating comprises a zinc-cobalt alloy, a zinc-iron alloy or a zinc-nickel alloy coating. It is possible to add iron, tin, copper or chromium to the coating composition.

REFERENCES:
patent: 4484988 (1984-11-01), Robinson
patent: 4508396 (1985-04-01), Doi et al.
patent: 4908280 (1990-03-01), Omura et al.
patent: 4946747 (1990-08-01), Bergmann et al.
patent: 5116144 (1992-05-01), Kamiya et al.
John L. Vossen, Thin Film Processes, Academic Press, New York, 1978, pp. v-vii, 11 and 209.
M. Sarojamma et al, Electrodeposition of Tungsten Alloys, Metal Finishing, Nov., 1971, pp. 42-48.

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