Process for producing protective coatings on metals and metal al

Details Process for producing protective coatings on metals and metal al Process for producing protective coatings on metals and metal al

1979-09-06

1980-12-23

Kendall, Ralph S.

Coating processes

Heat decomposition of applied coating or base material

Coating decomposed to form metal

4273839, 428652, 428667, C23C 900

Patent

active

042411130

ABSTRACT:
A process for forming a protective metal diffusion coating on a metal or metal alloy workpiece including internal cavity surfaces, comprises coating the workpiece with a slurry in acetone and cellulose acetate of a powder of average grain size of 0.5.mu. to 10.mu., including aluminum and possibly chromium and/or a small quantity of cerium or yttrium hydride and heating the workpiece in a non-oxidizing environment to dissociate the hydride and effect diffusion of the metals into the surface of the workpiece.

REFERENCES:
patent: 1655269 (1928-01-01), Howe
patent: 2811466 (1957-10-01), Samuel
patent: 3000755 (1961-09-01), Hanink et al.
patent: 3107175 (1963-10-01), Cape
patent: 3501338 (1970-03-01), Matzek
patent: 3720537 (1973-03-01), Rigney
patent: 3794511 (1974-02-01), Baranow
patent: 4009146 (1977-02-01), Cork et al.

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