Oxidation and corrosion resistant chromia forming coatings

Details Oxidation and corrosion resistant chromia forming coatings Oxidation and corrosion resistant chromia forming coatings

1987-07-07

1989-05-02

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

420442, 428679, B32B 1501, C22C 1905

Patent

active

048267384

ABSTRACT:
The adherence of protective chromia (chromium oxide) scales on Ni-Cr coatings is substantially improved by limiting the amount of sulfur in the coating composition to below about 5 parts per million by weight. Volatilization of the chromium oxide scale is also reduced by controlling the sulfur content. The coatings of this invention have improved resistance to oxidation and hot corrosion degradation than the coatings of the prior art.

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