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Effect of chromate ion on zinc electrowinning from acid sulphate electrolyte

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Abstract

The effect of chromate ion and its interaction with antimony and glue on zinc electrowinning from acid sulphate electrolyte were studied. During electrolysis at 430 A m−2 and 45°C, the chromate ion was found to polarize the cathodic reaction resulting in a refined zinc deposit having a morphology featuring a vertical orientation of the zinc platelets. Although chromium did not codeposit, the current efficiency for zinc deposition was dramatically decreased in the presence of > 1000 mg dm−3. This effect became more pronounced when the electrolyte also contained additives such as antimony and glue.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Central University, 32054, Chung-Li, Taiwan, ROC

    J.-C. Lin

  2. Energy and Resources Laboratories, ITRI, 31015, Chu-Tung, Taiwan, ROC

    S.-L. Tsai

Authors
  1. J.-C. Lin
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  2. S.-L. Tsai
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Lin, JC., Tsai, SL. Effect of chromate ion on zinc electrowinning from acid sulphate electrolyte. J Appl Electrochem 24, 1044–1051 (1994). https://doi.org/10.1007/BF00241197

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  • DOI: https://doi.org/10.1007/BF00241197

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