Investigation of Fe-Ni-Al₂O₃ Anodes for Aluminum Production

Abstract

In this paper, electrolysis tests were carried out for analyzing the gas purities evolving from the cup-shaped Fe-Ni-Al₂O₃ anodes, which were made by slip casting. The oxygen purity of the collecting anodic gas detected by Orsat apparatus was in an interval of 98–100%. SEM and XRD results showed that Fe-Ni-Al₂O₃ anode surface formed a layer that consisted of FeAl₂O₄, NiO, and Al₂O₃ mainly, as well as small amounts of metal phase Ni₃Al.