Phosphating process with metalliferous after-rinse

Details Phosphating process with metalliferous after-rinse Phosphating process with metalliferous after-rinse

C - Chemistry, Metallurgy

23

C

C23C 22/83 (2006.01) C23C 22/12 (2006.01) C23C 22/36 (2006.01) C23C 22/42 (2006.01)

Patent

CA 2216925

The invention concerns a process for phosphating metal surfaces, wherein phosphating is carried out using a zinc-containing phosphating solution which is nitrite and nickel-free. Rinsing is then optionally carried out, followed by re-rinsing with an aqueous solution having a pH of between 3 and 7 and containing between 0.001 and 10 g/l of one or more of the cations of Li, Cu and Ag.

L'invention concerne un procédé de phosphatation de surfaces métalliques selon lequel la phosphatation s'effectue à l'aide d'une solution contenant du zinc et qui est exempte de nitrite et de nickel. Le rinçage facultatif est suivi d'un rinçage final effectué à l'aide d'une solution aqueuse dont le pH est compris entre 3 et 7 et qui contient entre 0,001 et 10 g/l d'un ou de plusieurs cations de Li, Cu et Ag.

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