Cementation of Ni2+ ions from acidic sulfate solutions onto a rotating zinc disc

During cementation of Ni2+ ions onto a zinc electrode, the time-dependence of the concentration of Ni2+ ions was studied by atomic absorption spectroscopy. The electrode surface was analyzed by S.E.M. and the surface area was measured by electrochemical impedance spectroscopy. The cementation is sho...

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Bibliographic Details
Published in:Electrochimica acta 1998-07, Vol.43 (21-22), p.3159-3164
Main Authors: MAKHLOUFI, L, SAIDANI, B, CACHET, C, WIART, R
Format: Article
Language:English
Subjects:
Applied sciences
Chemical Sciences
Exact sciences and technology
Hydrometallurgy
Metals. Metallurgy
Production of metals
Production of non ferrous metals. Process materials
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Summary:During cementation of Ni2+ ions onto a zinc electrode, the time-dependence of the concentration of Ni2+ ions was studied by atomic absorption spectroscopy. The electrode surface was analyzed by S.E.M. and the surface area was measured by electrochemical impedance spectroscopy. The cementation is shown to be a first-order reaction which is diffusion-controlled. The reaction rate is strongly affected by the increase in the electrode surface area with increasing cementation time.
ISSN:0013-4686
1873-3859
DOI:10.1016/S0013-4686(98)00006-1