Metal diffusion and after-treatment

Details Metal diffusion and after-treatment Metal diffusion and after-treatment

1986-09-08

1992-07-07

Childs, Sadie

Coating processes

Coating by vapor, gas, or smoke

Metal coating

427253, 427352, C23C 1606, B05D 300

Patent

active

051281791

ABSTRACT:
A nickel-base superalloy is subjected to a diffusion chromizing that supplies a chromized diffusion case, the outer surface of which contains excess alphachrome phase, and then contacting the diffusion case with an aqueous solution of alkali metal permanganate and alkali metal hydroxide until the desired amount of alphachrome phase is eliminated.

REFERENCES:
patent: 3028261 (1962-04-01), Wachtell et al.
patent: 3773670 (1973-11-01), Colom et al.
patent: 3785854 (1974-01-01), Baldi
patent: 4041196 (1977-08-01), Baldi et al.
patent: 4327134 (1982-04-01), Baldi

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