High temperature protective coating

Details High temperature protective coating High temperature protective coating

1988-12-29

1990-03-20

Dean, R.

Alloys or metallic compositions

Nickel base

Chromium containing

420445, 428679, 428680, C22C 1905

Patent

active

049099841

ABSTRACT:
A high temperature protective coating formed by an alloy on the basis of nickel, cobalt, chromium, aluminum and also frequently of yttrium. There is improved adherence of the metallic oxide covering layer which forms on the protective coating and increased the oxidation and corrosion resistance. Silicon may be admixed to the alloy as a first addition. The amount of the silicon to be admixed to the alloy lies between 1 and 3% by weight. The oxidation and corrosion resistance can be increased by means of a further addition of zirconium in an amount of 1% by weight. The same results can be obtained by a further addition of tantalum, also in the amount of 1% by weight.

REFERENCES:
patent: 4034142 (1977-07-01), Hecht
patent: 4312682 (1982-01-01), Herchenroeder

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