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Effect of electrolysis superheat degree on anticorrosion performance of 5Cu/(10NiO-NiFe2O4) cermet inert anode

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5Cu/(10NiO-NiFe2O4) cermet inert anodes were prepared by cold-pressing and sintering process, and the effect of superheat degree of melting K3AlF6-Na3AlF6-AlF3 on their anticorrosion performance was studied under electrolysis conditions. The results show that, the fluctuation of cell becomes small with increasing of superheat degree, which is helpful to inhibit the formation of cathodic encrustation; the concentration of impurities from inert anode in bath goes up to certain degree, but it is far smaller than those in traditional high-temperature bath. Increasing the superheat degree of melting K3AlF6-Na3AlF6-AlF3 has unconspicuous effect on the contents of impurities in cathodic aluminum. The total mass fractions of Fe, Ni and Cu in aluminum are 15.38% and 15.09% respectively under superheat degree of 95 and 195 °C. From micro-topography of anode used view, increasing the superheat degree can aggravate corrosion of metal Cu in inert anode, and has negative influence on electrical conductivity of electrode to some extent.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Wang Jia-wei  (王家伟), Lai Yan-qing  (赖延清), Tian Zhong-liang  (田忠良) & Liu Ye-xiang  (刘业翔)

  2. College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang, 550003, China

    Wang Jia-wei  (王家伟)

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  1. Wang Jia-wei  (王家伟)
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  2. Lai Yan-qing  (赖延清)
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  3. Tian Zhong-liang  (田忠良)
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  4. Liu Ye-xiang  (刘业翔)
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Correspondence to Wang Jia-wei  (王家伟).

Additional information

Foundation item: Project (2005CB623703) supported by the Major State Basic Research and Development Program of China

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Wang, Jw., Lai, Yq., Tian, Zl. et al. Effect of electrolysis superheat degree on anticorrosion performance of 5Cu/(10NiO-NiFe2O4) cermet inert anode. J. Cent. South Univ. Technol. 14, 768–772 (2007). https://doi.org/10.1007/s11771-007-0146-5

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  • DOI: https://doi.org/10.1007/s11771-007-0146-5

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