About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Effect of Current Density on Cermet Inert Anode Corrosion Behavior in Low-Temperature Aluminum Electrolysis |
| Author(s) |
ShaoHui Han, Shengzhong Bao, Menghan Shi, Jing Li, Xu Shi, Fangfang Zhang, Lifen Luo, Changlin Li |
| On-Site Speaker (Planned) |
ShaoHui Han |
| Abstract Scope |
Inert anodes are critical for enabling low-carbon and sustainable aluminum production, yet their long-term corrosion stability remains a major bottleneck. We systematically investigated a ternary NiFe₂O₄-based cermet anode paired with a TiB₂-C composite cathode in a vertical cell at 810 °C over a range of current densities from 0.3 to 1.6 A/cm². The system operated stably with minor voltage fluctuations. The anode corrosion rate exhibited a non-monotonic V-shaped trend: it first decreased and then increased with rising current density. The minimum corrosion rate occurred at 0.6 A/cm², where a dense, continuous protective oxide film formed, establishing a dynamic equilibrium between film formation and dissolution. This equilibrium yielded the lowest corrosion rate and the minimal aluminum contamination in the cathodic product (0.269%). Below this threshold, the film was inadequately grown; above it, the film deteriorated due to intensified electrochemical attack and vigorous gas-bubble scouring. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Ceramics, Electrometallurgy |