| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Salt Processing for Corrosion Mitigation in Concentrated Solar Power Systems |
| Author(s) |
Jicheng Guo, Nathaniel C. Hoyt, Mark A. Williamson |
| On-Site Speaker (Planned) |
Jicheng Guo |
| Abstract Scope |
Molten MgCl2-KCl-NaCl mixtures are promising heat transfer fluid (HTF) candidates for next generation concentrating solar power systems (Gen3 CSP), because of their low cost, high decomposition temperature, and favorable heat transfer characteristics. However, if not properly processed, the impurities in molten chloride salts can corrode high-temperature metal alloys proposed for use in CSP systems. Here we demonstrate salt processing and purification techniques to eliminate the impurities and control the molten salt redox potential. During the purification process, the presence of corrosive impurities as well as the redox potential of molten MgCl2-KCl-NaCl mixtures is continuously monitored using a multifunctional voltammetry sensor that provides endpoint determination for the process. Alloy samples such as Inconel exposed to the purified salts are compared with those exposed to the unprocessed salts. The results show that the corrosion of the metal alloy by the molten chloride is effectively mitigated using the developed salt processing procedure. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |