Formation of protective coatings by electrolytic codeposition of

Details Formation of protective coatings by electrolytic codeposition of Formation of protective coatings by electrolytic codeposition of

1988-06-30

1989-12-12

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

C25D 1500

Patent

active

048865834

ABSTRACT:
Alloy steel or nickel based superalloy parts may be given protection against oxidation and frictional wear at temperatures below 600.degree. C. by means of a protective coating applied by electrolyte codeposition of a nickel-cobalt matrix comprising a uniform dispersion of ceramic particles selected from a group of carbides and oxides including SiC, Al.sub.2 O.sub.3, and Cr.sub.2 O.sub.3, the mass content of the ceramic particles being between 3.5% and 10%. The deposition is carried out in a sulfamate bath comprising a metallic salts content (Ni+Co) of from 70 g/l to 100 g/l, a Ni/Co mass ratio of from 5 to 33, and a mass content of the ceramic particles in suspension of from 50 g/l to 300 g/l.

REFERENCES:
patent: 3152971 (1964-10-01), Tomaszewski
patent: 4305792 (1981-12-01), Kedward
U.S. Pat. No. 3,152,971, (Tomaszewski), Colonne 2, Lignes 5-8; Colonne 4, Lignes 55-60.
U.S. Pat. No. 4,613,388, (Walter).

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