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South African Journal of Chemistry

On-line version ISSN 1996-840X

Abstract

EBADI, Mehdi; BASIRUN, Wan Jeffrey; ALIAS, Yatimah  and  MAHMOUDIAN, Mohammad Reza. Galvanostatic electrodeposition of Ni-Co alloys in DMSO under a magnetic field. S.Afr.j.chem. (Online) [online]. 2011, vol.64, pp. 17-22. ISSN 1996-840X.

This paper focuses on the galvanostatic magneto-electrodeposition of Ni-Co alloys in dimethyl sulphoxide (DMSO) in the presence and absence of a permanent parallel magnetic field (PPMF) to the cathode surface. It was found that the mass deposition was enhanced in the presence of PPMF (9 T) compared with the deposition without PPMF. The percentage enhancement potential was elevated (ξ5% = 23.11, ξ2% = 10.65, ξ05% = 4.85) with current densities of 5,2 and 0.5 mA cm-2, respectively, in the presence of PPMF (9 T). Atomic force microscopy (AFM) showed that the roughness of the Ni-Co alloy films was reduced from 56.187 to 31.716 nm (at 0.2 mA cm-2) and 97.541 to 52.644 nm (at 0.5 mA cm-2) with applied PPMF (9 T) compared with that without the PPMF. The deposited layers were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX).

Keywords : Potential enhancement; roughness; DMSO; magnetic electrodeposition.

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