About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Electrode Technology for Aluminum Production
|
| Presentation Title |
A Novel Method for Selecting Anti-Oxidation Coating Materials for Prebaked Carbon Anodes |
| Author(s) |
Christian Lubombo, Bertrand Roussillo, Jonathan Cramer, Matthieu St-Laurent |
| On-Site Speaker (Planned) |
Christian Lubombo |
| Abstract Scope |
Applying anti-oxidation coatings to prebaked carbon anodes is an effective strategy to reduce the net carbon consumption (NCC) and greenhouse gas emissions of aluminum smelting. Traditionally, the performance of such coatings has been evaluated in laboratory settings by comparing the air reactivity of coated versus uncoated carbon substrates. This paper introduces a novel method to identify the most promising coating material. Three ceramic-based coatings from different suppliers were applied to the same type of carbon substrate. The performance of the coatings was evaluated using both standard air reactivity tests and pull-off adhesion strength measurements. All three coatings significantly reduced air reactivity loss to approximately 3%, compared to 28% for the uncoated substrate. However, the pull-off adhesion strength varied by a factor of three among the coatings. The coating with the highest adhesion was selected, as superior adhesion enhances long-term durability under the harsh conditions of an electrolysis cell.Subsequently, the thickness of the selected coating was optimized in the presence of fluorine vapor to ensure maximum performance. |
| Proceedings Inclusion? |
Planned: Light Metals |