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Article
2011

The influence of electrolyte composition on pH of nickel hydrate formation


Vu Thi DuyenVu Thi Duyen, O. V. DolgikhO. V. Dolgikh, N. V. SotskayaN. V. Sotskaya
Russian Journal of Physical Chemistry A
https://doi.org/10.1134/S0036024411060343
Abstract / Full Text

The influence of the composition of nickel plating electrolytes containing various ligands (Ac, Gly, and Asp2−) on pH of nickel hydrate formation (pHhydr) was studied. The data obtained were interpreted from the point of view of ionic equilibria in the systems studied. The nature of sparingly soluble precipitates formed in these electrolytes when pHhydr was reached was determined. Sparingly soluble precipitates were found to be pure Ni(OH)2 hydroxides or basic salts with the composition Ni(OH) n Cl2 − n , in which the content of chloride ions increased as the concentration of NiCl2 grew. Organic substance anions were absent in the precipitates formed and only influenced pHhydr through changes in the concentration of free nickel ions as a result of complex formation. A principle of selecting the composition of nickel plating electrolytes was suggested on the basis of the results obtained.

Author information
  • Voronezh State University, Universitetskaya pl. 1, Voronezh, 394893, RussiaVu Thi Duyen, O. V. Dolgikh & N. V. Sotskaya
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