Abstract
The nickel deposits obtained from a mixed solvent bath (25 vol.% ethylene glycol and 75 vol.% diethylene glycol) using nickel sulphamate as the electrolyte were found to be bright, adherent and smooth at a current density of 1.0 A dm −2 and 30 °C. The influence of the bath and annealing temperatures on microhardness and microstructure was investigated. The structural studies were conducted using scanning and transmission electron microscopy and X-ray diffraction. Scanning electron microscopy revealed a fine-grained structure without cracks. As-deposited nickel showed a preferred orientation at different current densities. The results have been explained by taking into account the hydrogen content in the deposits.
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