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Abstract
Ni-Mo, Ni-Zn, Ni-Co, Ni-W, Ni-Cr and Ni-Fe, binary-composite, codeposit surface coatings on mild-steel substrates were prepared by conventional electrodeposition techniques. The chemical compositions and the micrographic surface features of these coatings are reported. The utility of these coatings as cathodes in laboratory-scale alkaline-water electrolytic cells was assessed by polarisation techniques. The trend in their electrocatalytic activities ranks in this order: Ni-Mo>Ni-Zn>Ni-Co>Ni-W>Ni-Fe>Ni-Cr. The electrocatalytic activity of these coatings is very significant when compared with the data on conventional mild-steel cathodes currently used in industry. The results obtained experimentally are presented. A brief discussion is also included to highlight their utility.
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