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Sliding wear behaviour of zinc–cobalt alloy electrodeposits

Authors
Journal
Journal of Materials Processing Technology
0924-0136
Publisher
Elsevier
Publication Date
Volume
160
Issue
2
Identifiers
DOI: 10.1016/j.jmatprotec.2004.06.014
Keywords
  • Sliding Wear
  • Zinc–Cobalt Alloy Electrodeposits

Abstract

Abstract The wear behaviour of zinc–cobalt electrodeposited coatings on copper substrates was investigated, using a pin-on-disc wear apparatus. The composition of the zinc–cobalt alloy coatings was the following: Zn–0.6 wt.% Co and Zn–4 wt.% Co respectively. The friction coefficient of Zn–4 wt.% Co coatings against stainless steel was found to be similar to that of Zn–0.6 wt.% Co coatings against the same steel. The normalized weight loss of Zn–4 wt.% Co coatings was found to be higher than that of Zn–0.6 wt.% Co coatings. The main wear mechanism for the Zn–0.6 wt.% Co coatings was found to be severe shearing of the coatings surface layers, due to the plowing action of the stainless steel pins. For the Zn–4 wt.% Co coatings the predominant wear mechanism was noted to be intensive surface delamination leading to spalling and brittle fracture of the coatings surface layers.

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