Process for phosphating metal surfaces

Details Process for phosphating metal surfaces Process for phosphating metal surfaces

1985-10-01

1987-06-16

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23C 2214

Patent

active

046734449

ABSTRACT:
A method of phosphating the surfaces of iron-based metals, zinc-based metals, or combinations of such surfaces by contacting the metal surfaces with an acidic aqueous phosphating solution containing from about 0.1 to about 2.0 g/l of zinc ion, from about 5 to about 30 g/l of phosphate ion, from about 0.2 to about 3 g/l of manganese ion, and a conversion coating accelerator. The phosphated metal surfaces are then suitable for electrocoating.

REFERENCES:
patent: 4292096 (1981-09-01), Murakami
patent: 4338141 (1982-07-01), Senzaki
patent: 4389260 (1983-06-01), Hauffe et al.

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