C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
148/21, 204/83
C25D 9/10 (2006.01)
Patent
CA 1076007
Abstract of the Disclosure 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.
271060
Inco Limited
Na
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