MICROSTRUCTURE OF ELECTRODEPOSITED NI-MN COATINGS

Authors
STEPHEN A ILANGO M NAGARAJAN T ANANTH MV
Citation
A. Stephen et al., MICROSTRUCTURE OF ELECTRODEPOSITED NI-MN COATINGS, Transactions of the Institute of Metal Finishing, 76, 1998, pp. 111-113
Citations number
14
Categorie Soggetti
Metallurgy & Metallurigical Engineering","Materials Science, Coatings & Films
Journal title
Transactions of the Institute of Metal Finishing → ACNP
ISSN journal
00202967
Volume
76
Year of publication
1998
Part
3
Pages
111 - 113
Database
ISI
SICI code
0020-2967(1998)76:<111:MOENC>2.0.ZU;2-T
Abstract
Ni-Mn alloys were electrodeposited on stainless steel substrates from simple sulphate baths with ammonium sulphate as the additive. The infl uence of Ni/Mn metal ratio (in the bath) on microstructure of the coat ings was investigated with colour polarisation optical microscopy. The most homogenous and textured deposit was obtained with a Ni/Mn metal ratio of 0.67. Ni/Mn metal ratio of above 6.0 introduced surface rough ness in the coating. Multiphase deposits were obtained with a Ni/Mn me tal ratio in the range 1.0 to 3.0. Monophase deposits could be plated only from baths with a Ni/Mn metal ratio of 0.67 to 0.93. In three cas es, unique microstructures were observed.