| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Corrosion behavior of metallic materials in heat transfer fluids and mitigation strategies for CSP applications |
| Author(s) |
Ceyhun Oskay, Christoph Grimme, Benjamin Grégoire, Mathias Galetz |
| On-Site Speaker (Planned) |
Mathias Galetz |
| Abstract Scope |
Integrating thermal energy storage (TES) has led to the emergence of concentrated solar power (CSP) technology as a promising renewable energy generation method. Current CSP plants utilize a mixture of sodium and potassium nitrates for TES. The use of molten nitrates leads to high corrosion rates for structural components.
The corrosion mechanisms of ferritic-martensitic and austenitic alloys in molten nitrates were investigated using immersion tests and ex-situ characterization methods, including quantifying the Cr-dissolution into the melt over time. To suppress this issue different diffusion and electroless deposited coatings have been developed and their corrosion resistance was investigated comparatively.
The next generation CSP plants will utilize solid particles as heat transfer media thereby enabling higher temperatures and the operation of a supercritical CO2 Brayton cycle. The alloy selection criteria for such conditions will be compared to those of the molten salt design. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Energy Conversion and Storage, Surface Modification and Coatings |