Production of zn-ni alloy plated steel strips

Details Production of zn-ni alloy plated steel strips Production of zn-ni alloy plated steel strips

C - Chemistry, Metallurgy

25

D

204/26

C25D 3/56 (2006.01) C25D 21/10 (2006.01)

Patent

CA 1253452

ABSTRACT OF THE DISCLOSURE Steel strips are electrogalvanized with a Zn-Ni alloy deposit having the desired nickel content in a consistent manner for a long time by placing separate Zn and Ni soluble anodes in a chloride plating bath comprising major proportions of ZnCl2 and NiCl2 in an Ni/(Zn + Ni) ratio between 0.08 and 0.20 and a total molar mount of Zn + Ni of from 1 to 4 moles per liter, and b mole per liter of KCl and a mole per liter of NH4Cl with the proviso that the following 3 inequalities are satisfied: (1) Image a + 4.0 ? b ? Image a + 5.4 (2) a ? 0 (3) b ? 0 passing a steel strip through the bath; and introducing currents to the soluble Zn and Ni anodes to thereby deposit a Zn-Ni alloy plating on the steel strip.

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