Abstract
The electrodeposition of nickel-thallium alloy powder was investigated from acidic sulphate baths containing 0.0125 NiSO4·6H2O, 0.005–0.020 Tl Cl, 0.05–0.23 (NH4)2SO4, 0.1 H3BO3 and 0.07 mol l−1 Na2SO4 · 10H2O. The polarization curves, the percentage composition and the current efficiency of the electrodeposited alloy powders were determined as a function of the bath composition. In addition, some properties of the deposits were examined such as the surface morphology, the structure as revealed by X-ray diffraction analysis and the catalytic activity towards the decomposition of 0.4% H2O2 solution. The results indicate that the characteristics of the alloy deposition and the properties of the alloy powder are affected to different extents by the bath composition.
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