Study of some physical properties and structure of nickel electrodeposits from sulphamate-mixed organic solvents

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...

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Bibliographic Details
Published in:Materials chemistry and physics 1994-12, Vol.39 (2), p.124-128
Main Authors: Singh, V.B., Sarabi, R.Sadeghi
Format: Article
Language:English
Subjects:
Applied sciences
Electrodeposits
Exact sciences and technology
Metallic coatings
Metals. Metallurgy
Nickel
Production techniques
Sulphamate-mixed organic solvents
Surface treatment
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Summary: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.
ISSN:0254-0584
1879-3312
DOI:10.1016/0254-0584(94)90188-0