Corrosion-resistant coated ferrous body

Details Corrosion-resistant coated ferrous body Corrosion-resistant coated ferrous body

1983-08-24

1985-05-07

Skiff, Peter K.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428663, 428664, 428666, 428684, H01M 1039, B32B 1518

Patent

active

045158657

ABSTRACT:
A ferrous metal body having a diffusion bonded coating which is corrosion resistant and free of any significant polarization, the bulk of said coating being comprised an alloy of at least about 70% by weight molybdenum, up to about 5% by weight iron balance chromium, the outside surface or surface portion of said coating being comprised of an alloy of at least about 30% by weight chromium, up to about 1% by weight iron, balance molybdenum, said outside surface or outside surface portion of said coating being significantly richer in chromium than said bulk portion, and a diffusion bonding layer comprised of MoCrFe alloy extending from said bulk portion into the surface of said ferrous body, said diffusion bonding layer being comprised of at least about 10% by weight molybdenum, at least about 5% by weight chromium and at least about 10% by weight iron.

REFERENCES:
patent: 2859158 (1958-11-01), Schaer
patent: 3117846 (1964-01-01), Chao
patent: 3959013 (1976-05-01), Breiter
patent: 4131226 (1978-12-01), Breiter et al.
patent: 4232098 (1980-11-01), Park et al.
patent: 4234668 (1980-11-01), Park et al.

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