Corrosion resistant plating and method utilizing alloys having m

Details Corrosion resistant plating and method utilizing alloys having m Corrosion resistant plating and method utilizing alloys having m

1978-09-27

1980-02-12

Steiner, Arthur J.

Stock material or miscellaneous articles

All metal or with adjacent metals

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

85 1C, 204 41, 427405, 427406, 428658, 428659, 428667, 428674, 428675, 428678, 428679, B32B 1500, B32B 1518

Patent

active

041884590

ABSTRACT:
A multi-layer plating and method for improving the corrosion resistance of ferrous metal articles, such as steel fasteners, are provided in accordance with the invention. The multi-layer plating comprises, in sequence over a ferrous metal substrate, a layer of an alloy which has micro-throwing power, such as nickel-cadmium, nickel-zinc, iron-cadmium, iron-zinc, cobalt-cadmium, or cobalt-zinc, a layer of cadmium, cadmium-tin alloy, a dual layer of cadmium and tin, zinc or zinc alloy, a layer of copper, a layer of nickel, and a layer of chromium or a metallic chromium substitute. The method comprises plating, and preferably electroplating, the aforementioned layers of alloy and metals over an article having a ferrous metal substrate to obtain improved corrosion resistance.

REFERENCES:
patent: 1651278 (1927-11-01), Humphries
patent: 1835636 (1931-12-01), Corbit
patent: 1931704 (1933-10-01), Moore et al.
patent: 2124657 (1938-07-01), Ritzenthaler et al.
patent: 3247082 (1966-04-01), Du Rose
patent: 3249409 (1966-05-01), McLeod
patent: 3884116 (1975-05-01), Hage
patent: 4091173 (1978-05-01), Hage

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