Table of Contents
Journal of Coatings
Volume 2014 (2014), Article ID 659697, 10 pages
http://dx.doi.org/10.1155/2014/659697
Research Article

Studies on the Codeposition of SiC Nanopowder with Nickel, Cobalt, and Co-Ni Alloys

Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Aleja Mickiewicza 30, 30-059 Cracow, Poland

Received 5 February 2014; Revised 3 July 2014; Accepted 14 July 2014; Published 23 July 2014

Academic Editor: Fahmina Zafar

Copyright © 2014 Ewa Rudnik and Sławomir Syrek. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Electrodeposition of SiC nanopowder (approximately 120 nm) with nickel, cobalt, and Co-Ni alloy matrix was studied. It was found that particles suspended in the bath affect slightly the reduction of metallic ions. Incorporation of the ceramic particles was governed mainly by the morphology of the matrix surface, while no strict correlation between the amount of cobalt ions adsorbed on the powder and the SiC content in the composites was found. Microhardness of nickel deposits was  HV, while for cobalt-rich coatings (84–95 wt.% Co) the values were in the range of 260–290 HV, independently of the SiC content in the coatings. Fine-grained nickel deposits were characterized by good corrosion resistance, while cobalt and Co-Ni alloys showed high corrosion current densities.