Advertisement

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
Papers

Abstract

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.

Keywords

Aluminium Physical Chemistry Electrical Conductivity Reference Electrode Laboratory Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    ‘JANAF Thermochemical Tables’, Clearinghouse for Federal Scientific and Technical Information, Washington (1965, 1966).Google Scholar
  2. [2]
    J. Thonstad,Electrochim. Acta,15 (1970) 1569.Google Scholar
  3. [3]
    J. Thonstad, unpublished data.Google Scholar
  4. [4]
    E. W. Yim and M. Feinleib,J. Electrochem. Soc.,104 (1957) 622.Google Scholar
  5. [5]
    K. Matiasovsky, M. Malinovsky and S. Ordzovensky,J. Electrochem. Soc.,111 (1964) 973.Google Scholar
  6. [6]
    H. T. Shiver, J. L. Dewey and W. E. Campbell, French Patent No. 1, 457, 746 (1966).Google Scholar
  7. [7]
    B. J. Welch,Austral. Inst. Min. Met., Proceed., No. 214 (1965) 1.Google Scholar
  8. [8]
    T. K. McMahon and G. P. Dirth,J. Metals,18 (1966) 317.Google Scholar
  9. [9]
    A. G. Arkadev,Sov. J. Non Ferrous Met.,35 (1962) 51.Google Scholar
  10. [10]
    H. Ginsberg and S. Wilkening,Metallwissenschaft Technik,18 (1964) 908.Google Scholar
  11. [11]
    A. M. Voskanyan and A. I. Belyaev,Izv. Vyssh. Uchebn. Zav. Tsvet. Met.,9 (1966) 75.Google Scholar
  12. [12]
    M. J. Bocquentin,Bull. Soc. Franc. Electriciens,99 (1949) 677.Google Scholar
  13. [13]
    R. A. Lewis, Kaiser Aluminium and Chem. Corp., French Patent No. 1,592,315 (1968).Google Scholar
  14. [14]
    W. E. Haupin,The Metallurgical Soc. of AIME, Paper No. A 70-37, New York (1970).Google Scholar
  15. [15]
    H. Stern and G. T. Holmes,J. Electrochem. Soc.,105 (1958) 478.Google Scholar
  16. [16]
    I. Cadariu,Bull. Soc. Franc. Electriciens,74 (1947) 531.Google Scholar
  17. [17]
    M. Lewellyn,J. Metals,22 No. 7 (1970) 57.Google Scholar

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

Personalised recommendations