Process for phosphating metallic surfaces in nonaqueous phosphat

Details Process for phosphating metallic surfaces in nonaqueous phosphat Process for phosphating metallic surfaces in nonaqueous phosphat

1983-03-16

1984-05-08

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23F 710

Patent

active

044472730

ABSTRACT:
A process for phosphating metallic surfaces in nonaqueous phosphating baths comprising low-boiling halogenated hydrocarbons, aqueous phosphoric acid as the phosphating agent, alcohols as the solubilizer, and, optionally, further known components, e.g., stabilizers, inhibitors, or accelerators, comprising dipping the workpieces to be phosphated at least twice for at least 10 seconds into the boiling phosphating bath and, in the interval, leaving them for at least 20 seconds in the gaseous phase.

REFERENCES:
patent: 2854370 (1958-09-01), Kronstein
patent: 2992146 (1961-07-01), Low

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