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Journal of Applied Electrochemistry

, Volume 12, Issue 1, pp 21–31 | Cite as

Evaluation of organic additives as levelling agents for zinc electrowinning from chloride electrolytes

  • D. J. MacKinnon
  • J. M. Brannen
Papers

Abstract

The effects of various organic additives: Pearl glue, Separan NP10, Percol 140 and tetraalkylammonium chlorides, on zinc deposit morphology and orientation and on the current efficiency and energy requirement for zinc electrowinning from chloride electrolyte have been determined and compared. Tetrabutylammonium chloride (TBAC1) was more effective than Pearl glue, Separan NP10 or Percol 140 in smoothing the deposit, refining the grain size and eliminating dendritic growth. TBACl was also the most effective of the tetraalkylammonium chlorides studied. Tetraethylammonium chloride (TEACl) had little effect on the deposit grain size even at concentrations as high as 60 mg dm−3. Tetrapropylammonium chloride (TPrAG) was more effective than TEACl but less effective than TBACl. Small additions (10 mg dm−3) of tetrapentylammonium chloride (TPACl) produced a very fine-grained deposit, but the deposit edges were rougher than in the presence of TBACl.

Keywords

Zinc Current Efficiency Tetrabutylammonium Dendritic Growth Small Addition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd. 1982

Authors and Affiliations

  • D. J. MacKinnon
    • 1
  • J. M. Brannen
    • 1
  1. 1.Extractive Metallurgy Laboratory, Mineral Sciences LaboratoriesCANMET, Energy, Mines and Resources CanadaOttawaCanada

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