Process for phosphating metal surfaces

Details Process for phosphating metal surfaces Process for phosphating metal surfaces

1990-05-30

1991-08-13

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148262, C23C 2240, C23C 2216

Patent

active

050393634

ABSTRACT:
A process for phosphating the surfaces of iron-based metals, zinc-based metals or combination of such surfaces by treating the metal surfaces with an aqueous acidic zinc-phosphating solution comprising from about 0.1 to about 200 g/l of zinc ion, from about 5 to about 40 g/l of phosphate ion, from about 0.01 to 20.0 g/l as tungsten of soluble tungsten compound and a conversion coating accelerator. The metal surfaces thus phosphated with the solution are suitable for electrocoating.

REFERENCES:
patent: 2502441 (1950-04-01), Dodd
patent: 2854369 (1958-09-01), Kronstein
patent: 3261723 (1966-07-01), Craig
patent: 3819424 (1974-06-01), Russel
patent: 4264378 (1981-04-01), Oppen
European Pat. Off. 0135622.

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