Electroplating of iron-cobalt alloy onto aluminum alloy parts

Details Electroplating of iron-cobalt alloy onto aluminum alloy parts Electroplating of iron-cobalt alloy onto aluminum alloy parts

1997-02-28

1998-09-22

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Forming nonelectrolytic coating before depositing...

205255, 205259, C23C 2802, C25D 356

Patent

active

058109927

ABSTRACT:
A process for plating aluminum alloy substrates such as aluminum pistons with an iron-cobalt alloy comprising the steps of (a) plating on the aluminum alloy substrate a thin layer of nickel from an electroless nickel bath; and (b) plating on the nickel layer a layer of iron-cobalt alloy from an iron-cobalt electroplating bath. The iron-cobalt layer is not subject to the corrosion problems inherent in a substantially pure iron-plated coating nor the excessive hardness, costliness, and environmental concerns related to the use of nickel as the primary plated layer. The iron-cobalt electroplating bath is cost-effective and can be utilized in a totally closed loop plating system. The resulting iron-cobalt plated, aluminum alloy parts evidence good adhesion, wear, thermal conductivity, and corrosion-resistant properties.

REFERENCES:
patent: 3098803 (1963-07-01), Godycki et al.
patent: 4226681 (1980-10-01), Shirahata et al.
G.O. mallory and J.B. Hajdu, Electroless Plating, American Electroplaters and Surface Finishers Society, Orlando, Fl. pp. 196-201 (1990). no month available.

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