Ductile corrosion resistant chromium-aluminum coating on superal

Details Ductile corrosion resistant chromium-aluminum coating on superal Ductile corrosion resistant chromium-aluminum coating on superal

1974-11-27

1976-05-11

Williams, Howard S.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

204181, B23P 300, C25D 1302

Patent

active

039559351

ABSTRACT:
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.

REFERENCES:
patent: 3795601 (1974-03-01), Brewer et al.
patent: 3819338 (1974-06-01), Burgardt et al.
patent: 3869779 (1975-03-01), Gedwill et al.

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