Phosphatation of metallic surfaces

Details Phosphatation of metallic surfaces Phosphatation of metallic surfaces

1976-04-08

1978-05-16

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

C23F 710

Patent

active

040897087

ABSTRACT:
A treatment of iron or steel surfaces to give them enhanced anti-corrosive and paint-retaining characteristics comprises the application, by spraying, dipping or otherwise, of a composition in the form of a solution of phosphates which includes an accelerating agent represented by a quantity of tungstate ion and which has a pH value in the range 5.8 to 6.5, and preferably 6.0 to 6.4.

REFERENCES:
patent: 2502441 (1950-04-01), Dodd et al.
patent: 2839439 (1958-06-01), Stapleton
patent: 2854369 (1958-09-01), Kronstein
patent: 2926123 (1960-02-01), Simon et al.
patent: 3247791 (1966-04-01), Leonard
patent: 3769043 (1973-10-01), Morishima et al.
patent: 3945899 (1976-03-01), Nikaido et al.

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