About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
Solid-Solution Alloying Effects in Molten Chloride Salt Corrosion |
Author(s) |
Touraj Ghaznavi, Suraj Y. Persaud, Roger C. Newman |
On-Site Speaker (Planned) |
Roger C. Newman |
Abstract Scope |
A comprehensive study of solid-solution alloying effects in any kind of corrosion requires the use of model alloys prepared in a high-throughput melter. We used an Arcast induction melter to prepare Ni-Fe(Cr) alloys for corrosion studies in a molten K-Li-Mg eutectic. After annealing, they were subjected to a variety of electrochemical corrosion procedures, using Mg as reference electrode. The new findings include a lower than usual parting limit for dealloying, due to the very high surface mobility of the most noble element (Ni). This limit was decreased still further when the temperature was increased to the point that lattice diffusion started to contribute to the transport of alloying elements. At lower temperatures such as 350 °C, the microporous dealloying morphology resembled that seen in aqueous systems (but much coarser), while at temperatures such as 600 °C, a more “1-D” type of corrosion occurred, but still respected a parting limit. |
Proceedings Inclusion? |
Planned: |