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 |
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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. |
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ISSN: | 1059-9495 1544-1024 |
DOI: | 10.1007/s11665-023-08641-7 |