Abstract
The effect of Al3+ on the cathodic current efficiency, deposit morphology, crystallographic orientations and polarisation behaviour of the cathode during electrodeposition of nickel from acidic sulfate solutions was investigated. Higher concentration of Al3+ (>10 mg dm−3) significantly deteriorated the surface quality of the nickel deposit as well as the current efficiency. X-ray diffraction studies revealed that the (200) plane was the most preferred crystal plane and was not affected by the presence of varying concentration of Al3+ in the electrolytic bath. The presence of Al3+ caused polarisation of the cathode, which increased with increasing Al3+ concentration. The effect of Al3+ on the electrokinetic parameters: Tafel slope (b), transfer coefficient (α) and exchange current density (i0) were also investigated.
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Mohanty, U.S., Tripathy, B.C., Singh, P. et al. Electrodeposition of nickel in the presence of Al3+ from sulfate baths. J Appl Electrochem 35, 545–549 (2005). https://doi.org/10.1007/s10800-005-1518-x
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DOI: https://doi.org/10.1007/s10800-005-1518-x