Corrosion behaviour of iron and nickel-based alloys in molten chlorides for next-generation Concentrated Solar Power plants
| Main Authors: | Grégoire, Benjamin, Oskay, Ceyhun, Meißner, Tobias Marc, Galetz, Mathias Christian |
|---|---|
| Format: | Proceeding poster eJournal |
| Bahasa: | eng |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3697892 |
Daftar Isi:
- Since the energy conversion efficiency of CSP systems is directly linked to the operating temperature of the molten salt, the next-generation of CSP plants is targeted to operate at temperatures over 700°C. Due to their higher thermal stability compared to nitrate salts, molten chloride salts are considered as a promising HTF candidate for the next-gen CSP plants. Despite the competitiveness of molten chlorides as HTF, structural materials (i.e. iron and nickel-based alloys) experience severe corrosion in chloride mixtures. Therefore, the second part of this study investigates the corrosion mechanisms of P91 and Inconel 600 in flowing Ar with partial embedding in molten NaCl-KCl and in molten NaCl-KCl-MgCl2 at 700°C. Improvement of scaling behavior of low-Cr steels in molten nitrates allows their application in modern CSP plants thereby increasing the cost-efficiency. Understanding the prevailing corrosion mechanisms in molten chlorides will further develop material selection and corrosion mitigation strategies.