Effect of Molten Binary Salt on Inconel 600 and Hastelloy C-276 Superalloys for Thermal Energy Storage Systems: A Corrosion Study

The usage of molten salt in concentrated solar power plants leads to corrosion in energy storage container materials. However, the effect of temperature, duration and environmental conditions plays a major role in the hot corrosion mechanism of the components. The present research investigates the c...

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Veröffentlicht in:Journal of materials engineering and performance 2024-09, Vol.33 (17), p.9070-9083
Hauptverfasser: Prem Kumar, M., Arivazhagan, N., Chiranjeevi, C., Raja Sekhar, Y., Babu, N., Manikandan, M.
Format: Artikel
Sprache:eng
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Zusammenfassung:The usage of molten salt in concentrated solar power plants leads to corrosion in energy storage container materials. However, the effect of temperature, duration and environmental conditions plays a major role in the hot corrosion mechanism of the components. The present research investigates the corrosion behavior of Inconel 600 (IN 600) and Hastelloy C-276 (HC-276) in a 55 wt.% Na 2 SO 4  + 45 wt.% Diatomite molten salt environment. Hot corrosion studies were performed by immersion at 40, 80 and 120 h exposures. X-ray diffraction and scanning electron microscopy analysis examined the oxide phases and morphology formed on the corroded material. The mass loss observed at a maximum duration of 120 h is 0.002 g/cm 2 for Inconel 600 and 0.8965 g/cm 2 for Hastelloy C-276. The Inconel 600 shows less weight loss compared to Hastelloy C-276 due to the formation of a protective oxide layer of NiCr 2 O 4 . The materials exposed to molten salt show different surface morphology during the tested durations.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-023-08641-7