Process for phosphating electrolytically zinc-coated metals

Details Process for phosphating electrolytically zinc-coated metals Process for phosphating electrolytically zinc-coated metals

1986-10-20

1988-08-09

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23C 2213, C23C 2218

Patent

active

047625724

ABSTRACT:
A method for phosphate coating zinc or nickel-zinc alloy electrolytically coated metal surfaces, in which they are exposed to a phosphating solution containing zinc, manganese, and phosphate ions, and optionally cobalt and/or nitrate ions. The method is conducted at an elevated temperature for up to slightly more than 5 seconds.

REFERENCES:
patent: 3338755 (1967-08-01), Jenkins
patent: 3625777 (1971-12-01), Okabe et al.
patent: 3810792 (1974-05-01), Ries et al.
patent: 4497668 (1985-02-01), Mady et al.
patent: 4595424 (1986-06-01), Hacias
Industrie-Lackierbetrieb 1983, Moderne Zinkphosphatierverfahren . . . articles, by Dr. Klaus Wittel, pp. 169-171, 210-215.
SAE Technical Paper Series 820336, The Pretreatment of Steel . . . article by, J. W. Davis.
Second Generation Zinc Phosphate Coatings (May, 1982), pp. 1-3.
Galvanotechnik (1968), article by C. Reis, pp. 37-39.

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