Platinum enriched, silicon-modified corrosion resistant...

Details Platinum enriched, silicon-modified corrosion resistant... Platinum enriched, silicon-modified corrosion resistant...

C - Chemistry, Metallurgy

23

C

C23C 10/58 (2006.01) C23C 10/18 (2006.01)

Patent

CA 2184181

The oxidation and corrosion resistance of a nickel-base alloy are enhanced by a process which includes first enriching the surface of an alloy substrate with platinum, as by electrolytic deposition, and then simultaneously diffusing aluminum and silicon from a molten state into the platinum-enriched substrate. The invention further provides coatings and coated substrates with enhanced oxidation and corrosion resistance.

La résistance à l'oxydation et à la corrosion d'un alliage à base de nickel sont améliorées par un procédé qui consiste d'abord à enrichir la surface d'un substrat d'alliage avec du platine, par exemple par dépôt électrolytique, et ensuite à diffuser simultanément de l'aluminium et du silicium à l'état fondu dans le substrat enrichi au platine. La présente invention concerne en outre des revêtements et des surfaces recouvertes présentant une résistance améliorée à la corrosion et à l'oxydation.

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