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Alternative low-cost composite coated anodes for base metal electrowinning

Barmi, M.J. and Nikoloski, A.N. (2013) Alternative low-cost composite coated anodes for base metal electrowinning. In: Proceedings of the Materials Science & Technology MS&T’13® Conference, 27 - 31 October, Montreal, QC, Canada



Metal matrix and metal oxide matrix composite coatings containing lead and cobalt were electrodeposited onto PbCaSn and Ti substrates in an effort to develop an improved yet low-cost anode for base metal electrowinning. The anodes were tested under typical copper electrowinning conditions to study their polarisation behaviour. Lead balance method was used to calculate the corrosion rates of composite coated anodes and compare this with the corrosion rate of a conventional uncoated PbCaSn anode. The results show that incorporation of cobalt into the surface of lead has the effect of reducing the anode potential and corrosion rate during 7-day tests. Some of the new anodes showed much better performance than PbCaSn in 168 hour tests.

Item Type: Conference Paper
Murdoch Affiliation(s): School of Engineering and Information Technology
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