Ductile corrosion resistant coating on a superalloy substrate

Details Ductile corrosion resistant coating on a superalloy substrate Ductile corrosion resistant coating on a superalloy substrate

C - Chemistry, Metallurgy

25

D

204/97.18

C25D 13/02 (2006.01) B23P 15/04 (2006.01)

Patent

CA 1044643

DUCTILE CORROSION RESISTANT COATING ON A SUPERALLOY SUBSTRATE Abstract of the Disclosure A long lived, ductile, corrosion resistant coating on a superalloy body, such as a turbine vane, preferably cobalt base, is formed by electrophoretically depositing a mixture of elemental aluminum powder and chromium-aluminum alloy powder on a superalloy substrate, and diffusing the "green" coating into the substrate. By electrodepositing on and diffusing into the alloy substrate a specified mixture of aluminum and chromium- aluminum alloy, the outward diffusion of chromium and nickel from the substrate and resultant agglomeration of precipitated carbides in the diffusion layer are minimized so that ductility of the aluminum-chromium rich coating is improved.

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