Phosphating method

Details Phosphating method Phosphating method

1976-04-19

1978-01-31

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 315, C23F 710

Patent

active

040713792

ABSTRACT:
In a continuous process of phosphating ferrous metal surfaces using an acidic zinc phosphate solution comprising chlorate and optionally nitrate ions, ferrous ion is maintained at low concentration by controlled addition of a rapid acting oxidant, for example nitrite ion.

REFERENCES:
patent: 2326309 (1943-08-01), Romig
patent: 3333988 (1967-08-01), Douty et al.
patent: 3401065 (1968-09-01), Steinbrecher et al.
patent: 3607453 (1971-09-01), Engesser et al.
patent: 3619300 (1971-11-01), Heller et al.
patent: 3850700 (1974-11-01), Heller

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