Anodic Corrosion Behavior of NiFe2O4 - Based Cermet in Na3 AlF6-K3 AlF6-AlF3 for Aluminum Electrolysis
Document Type
Article
Publication Date
6-2015
Department
Department of Materials Science and Engineering
Abstract
A (Cu,Ni)/(10NiO-NiFe2O4) cermet was tested as an inert anode for aluminum electrolysis in Na3AlF6-K3AlF6-AlF3 melt at 1173 K (900 °C), and its corrosion behavior was studied. The results show that the low-temperature Na3AlF6-K3AlF6-AlF3 bath is beneficial, improving the service conditions. With the combined effects of the electrolyte composition and the nascent oxygen during electrolysis, the metal phase (Cu,Ni) at the surface of anode will not be leached preferentially, but be transferred into the aluminates including FeAl2O4, NiAl2O4 and CuAl2O4. This is helpful for the anode to improve its corrosion resistance.
Publication Title
Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Recommended Citation
Tian, Z.,
Lai, Y.,
Yang, S.,
Li, J.,
Hwang, J.,
&
Liu, Y.
(2015).
Anodic Corrosion Behavior of NiFe2O4 - Based Cermet in Na3 AlF6-K3 AlF6-AlF3 for Aluminum Electrolysis.
Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science,
46(3), 1257-1261.
http://doi.org/10.1007/s11663-015-0328-8
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/5073