C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/24 (2006.01) C23C 22/27 (2006.01) C23C 22/83 (2006.01)
Patent
CA 2068289
A process for forming improved chromate conversion coatings on zinc surfaces by treating the zinc surface with an aqueous acidic chromating solution which contains hexavalent chromium and a soluble inorganic salt which has a cation which will form an insoluble organic silicate and, thereafter, treating the thus-formed chromate conversion coating with an aqueous alkaline silicate solution which contains a soluble alkali metal silicate and fluoride ions.
Enthone-Omi Inc.
Maiquez Jose Antonio Ortega
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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