Hot-dip zinc plating method and its product

Details Hot-dip zinc plating method and its product Hot-dip zinc plating method and its product

1994-11-08

1996-06-25

Niebling, John

Coating processes

Immersion or partial immersion

Molten metal or fused salt bath

C23C 200

Patent

active

055298109

ABSTRACT:
When a hot-dip zinc plating layer, which contains Al, is applied on rimmed steel having Si level of less than 0.05% by weight or less, by the two-stage plating method, appearance failure can be prevented by setting the plating conditions as follows: in a first zinc bath consisting of zinc of 99.7% purity or more or in a second zinc bath which consists of zinc with 99.7% purity by weight or more and 0.05% or less of Al at a temperature of from more than 460.degree. C. to 490.degree. C. and for a dipping time of from 1 minute to 1.5 minutes; and, in a second zinc bath consisting of zinc of 99.7% purity by weight and from 2 to 10% by weight or less of A1 at a temperature of from 400.degree. C. to less than 430.degree. C. and for a dipping time of from 0.5 minute to 1.5 minutes.

REFERENCES:
patent: 5141781 (1992-08-01), Suzuki et al.

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