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

C - Chemistry, Metallurgy

23

C

C23C 2/06 (2006.01) C23C 2/02 (2006.01)

Patent

CA 2137189

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°C to 490°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 Al at a temperature of from 400°C to less than 430°C and for a dipping time of from 0.5 minute to 1.5 minutes.

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