Process of making a corrosion-resistant coated ferrous body

Details Process of making a corrosion-resistant coated ferrous body Process of making a corrosion-resistant coated ferrous body

1984-03-26

1985-05-21

Rutledge, L. Dewayne

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

4273839, 427253, C23C 1104, C23C 700

Patent

active

045186243

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 (1969-01-01), Chou
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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