Journal of Applied Electrochemistry

, Volume 1, Issue 4, pp 261–268 | Cite as

The decomposition voltage of aluminium reduction cells. The influence of the alumina content in the bath

  • J. Thonstad
  • A. Solbu
  • A. Larsen


The decomposition voltage on 75 kA aluminium reduction cells with Søderberg anodes was measured by extrapolation of current-voltage curves and by use of an aluminium reference electrode. Both methods yielded results in the range 1.50 V–1.85 V, although higher and lower values occasionally occurred. The anode-reference voltage as well as the cell voltage showed a marked increase when the alumina content in the bath decreased below 2 wt%, and the anode effect was approached. This behaviour is in good agreement with theoretical curves based on laboratory data on anodic over-voltage and electrical conductivity.


Aluminium Physical Chemistry Electrical Conductivity Reference Electrode Laboratory Data 
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Copyright information

© Chapman and Hall Ltd. 1971

Authors and Affiliations

  • J. Thonstad
    • 2
    • 1
  • A. Solbu
    • 2
  • A. Larsen
    • 2
  1. 1.The Engineering Research FoundationTechnical University of NorwayTrondheimNorway
  2. 2.A. S. Årdal og Sunndal VerkSunndalsøraNorway

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