1. Investigation of corrosion behaviour on Ni–Cr–Co and Ni–Cr–Mo alloys exposed to molten salt for thermal energy storage applications.
- Author
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Prem Kumar, M. and Manikandan, M.
- Subjects
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HEAT storage , *LIQUID alloys , *FUSED salts , *SOLAR power plants , *NICKEL-chromium alloys , *SCANNING electron microscopes , *PHASE change materials , *INCONEL , *ALLOYS - Abstract
This research mainly focuses on selecting phase change materials (PCM) and container materials for next-generation concentrated solar power plants (CSP). The present study investigates the hot corrosion behaviour of Inconel 617 and 625 in Na2SO4 + 45 wt-% diatomite PCM environment at 800°C for 40, 80 and 120 h. Oxide scales developed on the alloy surfaces were examined by Scanning electron microscope (SEM) and X-ray diffraction (XRD) to study morphology and oxide phases. The result indicates that Inconel 617 and 625 weight changes were 1.239 and 0.925 mg cm−2 at 800°C for a maximum duration of 120 h. The dense oxide of Cr2O3 is formed on alloys 617 and 625, which gives better oxidation resistance in a PCM environment. Moreover, the Inconel 625 shows lesser weight gain compared to Inconel 617 due to the presence of higher wt-% of Cr in the alloy and Nb formation oxides reducing corrosion species diffusion rate. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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