The effect of anode composition on passivation of commercial copper electrorefining anodes

Michael S. Moats, J. Brent Hiskey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

As commercial copper electrorefineries look to expand their capacities by increasing their operating current density, the likelihood of anode passivation intensifies. To improve the industry's understanding of the passivation phenomena, the role of anode composition was evaluated. While previous studies have focused on studying one impurity element at a time, this study was conducted using forty-four commercial electrorefining anode samples supplied by ten copper companies The passivation response of each sample was evaluated under accelerated galvanostatic conditions in synthetic copper electrowinning electrolyte at 65°C. This information allows for correlations between composition and passivation tendencies over a wide range of impurity elements and concentrations. It was found that selenium, tellurium, silver, lead and nickel accelerated passivation. It appeared that oxygen accelerated passivation when increased from 500 to 1500 ppm, but further increases did not have an effect. Arsenic was the only impurity found that inhibited passivation.

Original languageEnglish (US)
Title of host publicationSohn International Symposium
Subtitle of host publicationAdvanced Processing of Metals and Materials - Proceedings of the International Symposium
Pages507-518
Number of pages12
StatePublished - Dec 1 2006
Event2006 TMS Fall Extraction and Processing Division: Sohn International Symposium - San Diego, CA, United States
Duration: Aug 27 2006Aug 31 2006

Publication series

Name2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
Volume6

Other

Other2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
CountryUnited States
CitySan Diego, CA
Period8/27/068/31/06

Keywords

  • Anode
  • Copper electrorefining
  • Passivation

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Moats, M. S., & Hiskey, J. B. (2006). The effect of anode composition on passivation of commercial copper electrorefining anodes. In Sohn International Symposium: Advanced Processing of Metals and Materials - Proceedings of the International Symposium (pp. 507-518). (2006 TMS Fall Extraction and Processing Division: Sohn International Symposium; Vol. 6).