Process for diffusion coating metals

Details Process for diffusion coating metals Process for diffusion coating metals

1985-11-22

1987-08-18

Childs, Sadie L.

Coating processes

Coating by vapor, gas, or smoke

427252, 427253, 4272552, C23C 1606, C23C 1630

Patent

active

046876847

ABSTRACT:
A process for producing a two element deposition coating on metals e.g. for oxidation/corrosion protection of superalloys, comprises halide transfer of the two elements in sequence from a reaction charge, the reaction charge including a significant excess of halide activator over the amount required for stoichiometric considerations. The transportation of the first element is terminated by reacting its source to exhaustion, in the course of the transport reaction or by evacuating from the reaction vessel. Preferred elements are aluminum with silicon and aluminum with chromium.

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Walsh, P., "Chemical Aspects of Pack Cementation", Fourth International Congress, pp. 147-168, Oct. 1973.

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