Process for partial hot dipping of steel strips

Details Process for partial hot dipping of steel strips Process for partial hot dipping of steel strips

1982-12-16

1985-03-19

Morgenstern, Norman

Metal treatment

Compositions

Heat treating

148 315, 427156, 427300, 427433, 428631, 428632, C23C 110

Patent

active

045057605

ABSTRACT:
A process for the partial hot dipping of a long steel strip is disclosed which comprises forming an oxidation-inhibiting film, oxygen-impermeable and thermally stable in a hot-dipping bath, which film is produced by the chemical reaction of an iron content in the steel strip with an oxidation inhibiting film-forming agent, such as an inorganic phosphoric acid compound, on a predetermined area of the steel strip surface, forming, as required, an intermediate layer comprising an inorganic binder, such as water glass, on the resulting film, forming a carbon-containing, plateing-stopping film as a top coat on the intermediate layer, and hot dipping the steel strip.

REFERENCES:
patent: 3583932 (1971-06-01), Benton et al.
patent: 4101345 (1978-06-01), Huater et al.
patent: 4404030 (1983-09-01), Komura et al.

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