Process for the treatment by chemical conversion of substrates o

Details Process for the treatment by chemical conversion of substrates o Process for the treatment by chemical conversion of substrates o

1985-08-15

1987-06-02

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23C 2212

Patent

active

046700668

ABSTRACT:
Process for the treatment by chemical conversion, within very short spaces of time of substrates of zinc or of one of its alloys especially of continuously zinc coated steel coils, wherein the bath employed in the phosphatization step proper comprises, besides the conventional constituents, a proportion of 0.3 to 2 g/l of Fe.sup.2+ ions, this bath comprising also from 0.2 to 1.5 g/l, preferably from 0.2 to 1.2 gl/ of Zn.sup.2+ ions and from 0.3 to 2 g/l, preferably from 0.3 to 1.2 g/l of Ni.sup.2+ ions, the weight ratios

REFERENCES:
patent: 2316810 (1943-04-01), Romig
patent: 2316811 (1945-04-01), Romig
patent: 2394065 (1946-02-01), Jernstedt
patent: 3090709 (1963-05-01), Henricks

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