Electrodepositing ZnNi Alloys from Alkaline Electrolytes

F. I. Danilov, I. A. Shevlyakov, and T. E. Sknar

Ukrainian State University of Chemical Technology, pr. Gagarina 8, Dnepropetrovsk, 320640 Ukraine

Received May 22, 1997; in final form, March 15, 1999

Abstract—Codeposition of zinc and nickel from zincate electrolytes containing amino acid and alkanolamine is
studied. The alloy composition is constant in a wide range of current densities i. The relationship [c_Ni / c_Zn]_alloy
[c_Ni(II) /c_Zn(II)]_sol is valid for all i, pointing to normal codeposition of alloy components. In addition to traditional
limiting diffusion currents, partial voltammograms for Zn and Ni contain diffusion-kinetic waves caused by a
concurrent hydrogen evolution. At an increase in the Ni concentration, the throwing power and uniformity of
the alloying-component distribution along the Mohller cell cathode slightly decrease but remain sufficiently
high, which is of great importance for industrial electroplating.

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.