Bath and process for the phosphatization of metallic substrates,

Details Bath and process for the phosphatization of metallic substrates, Bath and process for the phosphatization of metallic substrates,

1997-09-02

2000-05-30

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148262, 148273, 148275, C23C 2207

Patent

active

060687096

ABSTRACT:
The invention relates to a process for the phosphatization of metallic substrates comprising the use of a phosphatization bath having a pH from 1 to 5.5 and which comprises from about 0.3 to about 25 g/l of zinc ion, preferably from 0.5 to 10 g/l, from 5 to about 50 g/l of phosphate ion, preferably from 8 to 30 g/l, and from about 0.01 to about 10 g/l, preferably from 0.03 to 3 g/l of a trivalent cobalt complex.

REFERENCES:
patent: 3420715 (1969-01-01), Ayres
patent: 4540494 (1985-09-01), Fuchs et al.
patent: 4717431 (1988-01-01), Knaster et al.
patent: 5298092 (1994-03-01), Schriever

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