Die casting with electrodeposited layers of nickel- iron,...

Details Die casting with electrodeposited layers of nickel- iron,... Die casting with electrodeposited layers of nickel- iron,...

C - Chemistry, Metallurgy

25

D

204/25

C25D 5/12 (2006.01) C25D 5/14 (2006.01)

Patent

CA 1212921

ABSTRACT OF THE DISCLOSURE A composite electroplated article and process for making same comprising a body having a plurality of adherent electroplates of controlled thickness and com- position thereon. The first layer comprises a nickel- iron alloy containing about 15 to about 50 percent by weight iron; the second layer comprises a nickel-con- taining plate of a sulfur content of about 0.02 to about 0.5 percent by weight; the third layer comprises a nickel- iron alloy containing about 5 to about 19 percent by weight iron but less iron than the first layer. Option- ally, a decorative chromium outer layer is applied to the surface of the third layer, and preferably, an inter- vening nickel plate is interposed between the third layer and outer chromium layer of a type selected to induce micro-discontinuities in the outer chromium layer.

408613

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