| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Corrosion Control of 316H Stainless Steel and Nickel-Based Alloys in Molten Chloride Salts |
| Author(s) |
Kasey L. Hanson, Krishna Moorthi Sankar, Remi Dingreville, Joshua Sugar, Chaitanya Deo, Preet M. Singh |
| On-Site Speaker (Planned) |
Kasey L. Hanson |
| Abstract Scope |
Molten chloride salts are used in various energy harvesting applications such as solar concentrators and molten salt reactors. Thermodynamically driven selective dissolution of alloying elements due to impurities present within the eutectic chloride salt mixture have been identified to be the main contributor to selective dissolution of active elements like chromium from structural alloys. Impurities in these salts, during salt preparation as well as during operation, are difficult to control. This work focused on the corrosion behavior of 316H stainless steel and nickel-based alloys in a KCl—MgCl2 eutectic mixture at 700°C. The effect of added impurities to control the redox potential of salt and hence the selective dissolution behavior of tested alloys was studied. Our results indicated that active metal additions like Mg can be very effective in controlling the redox behavior of salt, which in-turn can mitigate corrosion, but may also affect other material properties if incorrectly applied. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Temperature Materials, |