B.C. Tripathy, S.C. Das
This study investigates the effects of perfluorobutyric acid, perfluoroheptanoic acid, and perfluorooctanoic acid on the electrowinning of zinc from acidic sulphate solutions, focusing on cathodic current efficiency, power consumption, and cathode polarization behavior. Various experimental methodologies were employed including measurements of surface morphology and crystallographic orientations of zinc deposits. The results indicated that the addition of these perfluorocarboxylic acids augmented current efficiency and reduced power consumption while enhancing the quality of the surface morphology of zinc deposits. Voltammetric studies further revealed that the polarization behavior of the electrode with these additives followed a trend of PFOA showing the highest efficacy, followed by PFHA and then PFBA. Additionally, the nature of the electrode reactions was examined through analyses of exchange current densities, Tafel slopes, and transfer coefficients, concluding that perfluorocarboxylic acids serve as more effective additives for zinc electrodeposition in the absence of antimony(III) within the electrolyte. This comprehensive analysis offers significant insights into optimizing the electrochemical processes involved in zinc electrowinning.
@article{94736791-0c03-4a6d-83cf-a726e08e9a99,
title={Zinc electrowinning from acidic sulphate solutions Part IV 1: effects of perfluorocarboxylic acids},
author={B.C. Tripathy and S.C. Das},
year={2004},
language={en}
}TY - JOUR TI - Zinc electrowinning from acidic sulphate solutions Part IV 1: effects of perfluorocarboxylic acids AU - B.C. Tripathy AU - S.C. Das PY - 2004 LA - en ER -
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