Phosphate coatings for metal surfaces

Details Phosphate coatings for metal surfaces Phosphate coatings for metal surfaces

1988-02-16

1989-06-13

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148262, C23C 2212, C23C 2218

Patent

active

048389579

ABSTRACT:
Processes and solutions for phosphating metal surfaces. The solutions are acidic aqueous phosphate solutions containing (a) from 0.1 to 1.5 g/l of zinc ion; (b) from 5 to 50 g/l of phosphate ion; (c) from 0.2 to 4 g/l of manganese ion; (d) at least 0.05 g/l of fluoride ion; (e) less than 0.5 g/l of chloride ion; and (f) a phosphating accelerator. The metal surface phosphated with the solution including galvanized steel, is free of white spots and is suitable for electrocoating.

REFERENCES:
patent: 4292096 (1981-09-01), Murakami et al.
patent: 4311535 (1982-01-01), Yasuhara et al.
patent: 4338141 (1982-07-01), Senzaki et al.
patent: 4595424 (1986-06-01), Hacias

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