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Corrosion Behavior of VM12-SHC Steel in Contact with Solar Salt and Ternary Molten Salt in Accelerated Fluid Conditions

Surface Engineering and Nanostructured Materials Research Group, Faculty of Chemical Sciences, Complutense University of Madrid, Complutense Avenue s/n, 28040 Madrid, Spain
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Academic Editor: Antonio Barbucci
Energies 2021, 14(18), 5903; https://doi.org/10.3390/en14185903
Received: 7 July 2021 / Revised: 3 September 2021 / Accepted: 13 September 2021 / Published: 17 September 2021
Ternary low melting point mixtures with the addition of LiNO3 and Ca(NO3)2 have been presented as direct system candidates for CSP technologies due to having better physical and chemical properties than those of Solar Salt. In this study, thermal, physical and chemical properties are measured as is the corrosive behavior of stainless alloy VM12 (Cr 12%) when in contact with Solar Salt, 60% NaNO3-40% KNO3 (wt.%) and ternary 46% NaNO3-19% Ca(NO3)2-35% LiNO3 (wt.%). Gravimetric weight change measurements were performed on the test specimens, which were tested under accelerated fluid conditions (0.2 m s−1) at 500 °C for 2000 h. This research confirms the potential of this novel formulation as a thermal storage medium and validates the suitability of ferritic VM12-SHC stainless steel as a structural material for CSP technology with Solar Salt. Meanwhile, the results obtained by scanning electron microscopy and X-ray diffraction indicate a reduction in the protective character of the oxide layer formed on this alloy when the medium contains calcium and lithium components. View Full-Text
Keywords: molten salts corrosion; VM12 steel; parabolic trough technology; CSP; pilot plant molten salts corrosion; VM12 steel; parabolic trough technology; CSP; pilot plant
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MDPI and ACS Style

García-Martin, G.; Lasanta, M.I.; de Miguel, M.T.; Sánchez, A.I.; Pérez-Trujillo, F.J. Corrosion Behavior of VM12-SHC Steel in Contact with Solar Salt and Ternary Molten Salt in Accelerated Fluid Conditions. Energies 2021, 14, 5903. https://doi.org/10.3390/en14185903

AMA Style

García-Martin G, Lasanta MI, de Miguel MT, Sánchez AI, Pérez-Trujillo FJ. Corrosion Behavior of VM12-SHC Steel in Contact with Solar Salt and Ternary Molten Salt in Accelerated Fluid Conditions. Energies. 2021; 14(18):5903. https://doi.org/10.3390/en14185903

Chicago/Turabian Style

García-Martin, Gustavo, María I. Lasanta, María T. de Miguel, Andre I. Sánchez, and Francisco J. Pérez-Trujillo 2021. "Corrosion Behavior of VM12-SHC Steel in Contact with Solar Salt and Ternary Molten Salt in Accelerated Fluid Conditions" Energies 14, no. 18: 5903. https://doi.org/10.3390/en14185903

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