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Evaluation of zinc sulfate electrolytes by cyclic voltammetry and electron microscopy

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Abstract

A cyclic voltammetric technique has been developed for approximating the quantities of active chemical species present in zinc sulfate electrolytes. The experimental apparatus consisted of a Pyrex “H” cell, an aluminum cathode encased in a Teflon holder, a carbon anode and a mercurous sulfate reference electrode. Voltammograms were obtained using industrial, purified neutral leach solution (Cominco Ltd., Trail, BC) acidified to give a final concentration of 0.77 M Zn++ and 1 M H2SO4. The polarization curves were then evaluated and used as reference standards to compare with results obtained when various organic and inorganic additions were made. The deposit morphologies obtained for short-time cathodic cycles were also studied with the aid of a Scanning Electron Microscope. Changes in concentrations of glue in the 5 to 10 ppm range and of antimony in the 5 to 10 ppb range were detected using the techniques described.

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Authors and Affiliations

  1. Homer Research Laboratory, Bethlehem Steel Company, Bethlehem, PA

    Bruce A. Lamping (Metallurgist)

  2. GCMR, University of Missouri-Rolla, 65401, Rolla, MO

    Thomas J. O’Keefe (Professor of Metallurgical Engineering and Senior Investigator (Materials)

Authors
  1. Bruce A. Lamping
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  2. Thomas J. O’Keefe
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Lamping, B.A., O’Keefe, T.J. Evaluation of zinc sulfate electrolytes by cyclic voltammetry and electron microscopy. Metall Trans B 7, 551–558 (1976). https://doi.org/10.1007/BF02698587

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