Abstract:
5Cu-9.5NiO-85.5NiFe
2O
4 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 K
3AlF
6 is around 20% in Na
3AlF
6-30AlF
3-based electrolytes, the anodes show good anti-corrosion properties.