Patent ID: 6146702
Filing Date: 2000-11-14
Classification: C23C

Abstract:
A process for plating a substrate with a nickel, cobalt, phosphorous wear resistant alloy comprising:providing a substrate having a catalytic surface;forming a nickel, cobalt, phosphorous coating on the substrate by an electroless plating process using an electroless plating composition comprising:nickel ions in an amount of about 0.1 to 100 g/l;cobalt ions in an amount of about 0.1 to 100 g/l;a phosphorous containing reducing agent in an amount sufficient to reduce the nickel and cobalt ions;an effective amount of a complexing agent comprising glycolic acid or salts thereof;an effective amount of buffering agent; andan amount of a pH adjusting material to provide a pH of about 6.5 to 11; with the proviso that the plated alloy contain about 20% to about 70% by weight cobalt, greater than 2% to less than or equal to 9% by weight phosphorous and that the % Co/% P ratio be greater than about 5; andheat treating the plated substrate at a temperature above about 170.degree. C. to increase the hardness and wear resistance of the plated substrate.