Journal of Northeastern University ›› 2003, Vol. 24 ›› Issue (4): 361-364.DOI: -

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Cu-Ni-Al superalloy as inert metal anode for aluminum electrolysis

Shi, Zhong-Ning (1); Xu, Jun-Li (1); Gao, Bing-Liang (1); Qiu, Zhu-Xian (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2003-04-15 Published:2013-06-23
  • Contact: Shi, Z.-N.
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Abstract: Cu-Ni-Al alloy anode was investigated at 750-850°C in different concentration of A12O3 and cryolite ratio molten salt which consisted of Na3 AlF6-NaCl-CaF2-Al2O3. Anodic current density was set from 0.75 A/cm2 to 1.1 A/cm2. The results indicate that wear rate of the anode is different under various electrolysis operational conditions. The corrosion wear rate is much higher in the molten salt than in air atmosphere. Electrolysis corrosiveness of the anode relies on the concentration of A12O3 in the molten salt. The higher concentration of Al2O3 in electrolyte, the lower wear rate is. Like carbon anode, the Cu-Ni-Al inert metal anode shows very light corrosiveness at high anodic current density. The Cu-Ni-Al alloy shows a good potential as an inert metal anode material.

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