Platinum-rhodium-containing high temperature alloy coating metho

Details Platinum-rhodium-containing high temperature alloy coating metho Platinum-rhodium-containing high temperature alloy coating metho

1976-07-29

1978-01-24

Gwinnell, Harry J.

Coating processes

Coating by vapor, gas, or smoke

Metal coating

427253, 427328, 427383D, 427405, C23C 902, C23C 1102

Patent

active

040705072

ABSTRACT:
Aluminized nickel-base, cobalt-base and nickel-cobalt-base heat resistant alloy substrates are provided in which, prior to aluminizing the substrate, the substrate is provided with a thin coating of rhodium and thereafter a thin coating of platinum, the coatings being diffusion bonded to the substrate, such that when the prepared substrate is aluminized by pack cementation, a compositely structured coating is obtained characterized by improved resistance to high temperature oxidation and sulfidation.

REFERENCES:
patent: 3257230 (1966-06-01), Wochtell et al.
patent: 3494748 (1970-02-01), Todd
patent: 3677789 (1972-07-01), Bungardt et al.
patent: 3692554 (1972-09-01), Bungardt et al.
patent: 3819338 (1974-06-01), Bungardt et al.
patent: 3957454 (1976-05-01), Bessen
patent: 3961910 (1976-06-01), Baladjanian et al.
patent: 3976436 (1976-08-01), Chang
patent: 3978251 (1976-08-01), Stetson et al.

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