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

C - Chemistry, Metallurgy

23

C

117/94

C23C 2/02 (2006.01)

Patent

CA 1197418

ABSTRACT OF THE DISCLOSURE 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 pre- determined 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 intermdiate layer, and hot dipping the steel strip.

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