Chemistry: electrical and wave energy – Processes and products
Patent
1977-02-04
1978-01-31
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204 56R, 204130, C25D 1100, C25D 500
Patent
active
040714160
ABSTRACT:
A method of providing a hard film on stainless steel comprising treating the stainless steel in an aqueous solution of chromic and sulfuric acids to provide a film and then treating the metal containing the film in an aqueous solution of a water-soluble silicate for a period of time sufficient to harden the film.
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patent: 2746915 (1956-05-01), Giesker et al.
patent: 3210220 (1965-10-01), Cleg et al.
patent: 3437532 (1969-04-01), Helgert et al.
patent: 3755117 (1973-08-01), Hart
patent: 3804730 (1974-04-01), Evans et al.
patent: 3832292 (1974-08-01), Sutton et al.
patent: 3850767 (1974-11-01), Skedgell et al.
Andrews R. L.
MacQueen Ewan C.
Mulligan, Jr. Francis J.
The International Nickel Company Inc.
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