Process for the treatment of stainless steel for a direct galvan

Details Process for the treatment of stainless steel for a direct galvan Process for the treatment of stainless steel for a direct galvan

1981-05-14

1987-04-21

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204145R, C25D 536

Patent

active

046594388

ABSTRACT:
For the direct gold plating of stainless steel parts in acid baths there is needed a pretreatment of the parts. Known processes operate with corrosive media such as strong acids and attack the surface. These disadvantages are avoided by putting the stainless steel part in an electrolytic, aqueous solution and first treating cathodically and subsequently anodically.

REFERENCES:
patent: 2915444 (1959-12-01), Meyer
patent: 2973307 (1961-02-01), Hahn
patent: 3551302 (1970-12-01), Woods et al.
patent: 3642586 (1972-02-01), Shepard et al.
patent: 3694326 (1972-09-01), McCabe et al.
patent: 4078977 (1978-03-01), Fountain
patent: 4168214 (1979-09-01), Fletcher
Metal Finishing, Sep. 1970, p. 77.
Metal Finishing Guidebook and Directory 1978, Metals and Plastics Publications, Inc., Hackensack, N.J. pp. 128-131.

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