Journal of Applied Electrochemistry

, Volume 16, Issue 3, pp 387–392 | Cite as

The estimation of the coulombic efficiency of zinc electrodeposition by measurement of current efficiencies at a rotating ring disc electrode

  • E. J. Frazer
  • I. C. Hamilton
Papers

Abstract

The rotating ring disc electrode (RRDE) offers a simple method for the determination of the current efficiency (CE) of zinc electrodeposition in acidic zinc sulphate electrolytes. The hydrogen evolved during zinc deposition can be detected at the ring. This allows estimation of the current due to hydrogen formation at the disc and hence CE for electrodeposition of zinc can be calculated. Investigations of the conditions under which reliable measurements of CE can be obtained are described. A correlation between CE, determined using the RRDE, and the coulombic efficiency (QE), determined by weighing the zinc deposit obtained after 2 h electrodeposition at constant current, is established for a range of electrolyte compositions. It is suggested that measurement of CE at a Pt−Zn RRDE provides an efficient means of estimating QE for zinc electrolytes.

Keywords

Hydrogen Sulphate Zinc Reliable Measurement Current Efficiency 

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Copyright information

© Chapman and Hall Ltd. 1986

Authors and Affiliations

  • E. J. Frazer
    • 1
  • I. C. Hamilton
    • 2
  1. 1.Division of Mineral ChemistryCSIRO Institute of Energy and Earth ResourcesPort MelbourneAustralia
  2. 2.Department of Chemistry and BiologyFootscray Institute of TechnologyFootscrayAustralia

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