Effect of the addition of K₃AIF₆ into electrolytes on the corrosion behavior of NiFe₂O₄-based cermet anodes

5Cu-9.5NiO-85.5NiFe₂O₄ cermet anodes were tested in different low-temperature electrolytes for aluminum electrolysis.Post-electrolysis microscopic examination of the anodes was carried out by scanning electron microscopy(SEM) and X-ray diffraction(XRD).The contents of impurities both in the bath and aluminum were measured by inductively coupled plasma atomic emission spectrometry(ICP-AES).The corrosion rates of the anodes in different electrolytes were calculated and compared.The results indicate that when the addition amount of K₃AlF₆ is around 20% in Na₃AlF₆-30AlF₃-based electrolytes, the anodes show good anti-corrosion properties.