Process for phosphating metal surfaces

Details Process for phosphating metal surfaces Process for phosphating metal surfaces

C - Chemistry, Metallurgy

23

C

148/17

C23C 22/12 (2006.01) C23C 22/13 (2006.01) C23C 22/42 (2006.01)

Patent

CA 1333683

A process for phosphating the surfaces of iron-based metals, zinc-based metals or combination of such surfaces by treating the metal surfaces with ah aqueous acidic zinc- phosphating solution comprising from about 0.1 to about 2.0g/l of zinc ion, from about 5 to about 40g/l of phosphate ion, from about 0.01 to 20.0g/l as tungsten of soluble tungsten compound and a conversion coating accelerator. The metal surfaces thus phosphated with the solution are suitable for electrocoating.

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