Investigation of Factors Affecting Corrosion Mechanisms in Latent Heat Thermal Energy Storage Systems
DOI:
https://doi.org/10.52825/solarpaces.v2i.880Keywords:
Chloride Carbonate Salt, 316L Corrosion, Concentrated Solar Power (CSP), Compact Tension (CT) Specimen, Latent Heat Thermal Energy Storage (LHTES)Abstract
Concentrated Solar Power (CSP) plants integrated with Latent Heat Thermal Energy Storage (LHTES) systems offer a promising solution for dispatchability, reliability, and economic concerns generally associated with renewable energy technologies. These systems, however, require an operational life of up to 30 years to compete with power plant systems operating on fossil fuels. This is a significant challenge due to the high temperatures and corrosive eutectic salts utilised in LHTES systems. Additionally, these systems and its subcomponents are expected to be under varying degrees of stress due to the diurnal cyclic temperature variations inherent in the plant’s operational cycle. Hence, it is crucial to understand the various factors that can affect the operational life of materials used in such applications and conduct thorough material compatibility studies to assess the combined impact of these operating conditions on corrosion mechanisms. This study presents a novel static immersion test approach using modified Compact Tension (CT) specimens manufactured from 316L to investigate the effects of Na2CO3:NaCl (59.45:40.55 wt.%) salt, elevated temperatures (700 ℃ for up to 1000 hours), and stress on corrosion induced in the alloy. The post-exposure results are characterised with Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) shows that corrosion mechanisms are significantly affected by factors such as high operating temperatures leading to changes in both corrosion morphology and rate, high stresses causing localised preferential corrosion, as well as corrosive salt and oxygen availability affecting the type of corrosion induced.
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A. de la Calle, A. Bayon, and J. Pye, "Techno-economic assessment of a high-efficiency, low-cost solar-thermal power system with sodium receiver, phase-change material storage, and supercritical CO2 recompression Brayton cycle," Solar Energy, vol. 199, pp. 885-900, 2020.
M. Sarvghad, S. Delkasar Maher, D. Collard, M. Tassan, G. Will, and T. A. Steinberg, "Materials compatibility for the next generation of Concentrated Solar Power plants," Energy Storage Materials, vol. 14, pp. 179-198, 2018.
A. International, "E1820-21 Standard test method for measurement of fracture toughness," ed: ASTM International, 2021.
M. Turski, P. J. Bouchard, A. Steuwer, and P. J. Withers, "Residual stress driven creep cracking in AISI Type 316 stainless steel," Acta materialia, vol. 56, pp. 3598-3612, 2008.
A. J. Horn, A. H. Sherry, and P. J. Budden, "Size and geometry effects in notched compact tension specimens," The International journal of pressure vessels and piping, vol. 154, pp. 29-40, 2017.
M. Sarvghad, S. Bell, R. Raud, T. A. Steinberg, and G. Will, "Stress assisted oxidative failure of Inconel 601 for thermal energy storage," Solar Energy Materials and Solar Cells, vol. 159, pp. 510-517, 2017/01/01/ 2017.
S. Bell, M. Jones, E. Graham, D. Peterson, G. van Riessen, G. Hinsley, et al., "Corrosion mechanism of SS316L exposed to NaCl/Na2CO3 molten salt in air and argon environments," Corrosion Science, vol. 195, p. 109966, 2022.
S. Bell, G. Will, and T. Steinberg, "Corrosion testing under inert atmosphere with stainless steel crucibles," in AIP Conference Proceedings, 2019, p. 200004.
A. Palacios, M. E. Navarro, Z. Jiang, A. Avila, G. Qiao, E. Mura, et al., "High-temperature corrosion behaviour of metal alloys in commercial molten salts," Solar Energy, vol. 201, pp. 437-452, 2020/05/01/ 2020.
Y. Huang, "Oxidation and hot corrosion of metals and alloys," in Materials corrosion and protection, ed Berlin: De Gruyter, 2018, pp. 109-178.
X. Huang, K. Xiao, X. Fang, Z. Xiong, L. Wei, P. Zhu, et al., "Oxidation behavior of 316L austenitic stainless steel in high temperature air with long-term exposure," Materials Research Express, vol. 7, p. 066517, 2020/06/01 2020.
B. Gleeson, "1.09-Thermodynamics and Theory of External and Internal Oxidation of Alloys," Shreir's corrosion, pp. 182-184, 2010.
N. Karimi, F. Riffard, F. Rabaste, S. Perrier, R. Cueff, C. Issartel, et al., "Characterization of the oxides formed at 1000 C on the AISI 304 stainless steel by X-ray diffraction and infrared spectroscopy," Applied Surface Science, vol. 254, pp. 2292-2299, 2008.
K. A. Habib, M. S. Damra, J. J. Saura, I. Cervera, and J. Bellés, "Breakdown and Evolution of the Protective Oxide Scales of AISI 304 and AISI 316 Stainless Steels under High-Temperature Oxidation," International Journal of Corrosion, vol. 2011, p. 824676, 2011/08/16 2011.
M. Zhu, S. Zeng, H. Zhang, J. Li, and B. Cao, "Electrochemical study on the corrosion behaviors of 316 SS in HITEC molten salt at different temperatures," Solar Energy Materials and Solar Cells, vol. 186, pp. 200-207, 2018/11/01/ 2018.
S. Caines, F. Khan, and J. Shirokoff, "Analysis of pitting corrosion on steel under insulation in marine environments," Journal of Loss Prevention in the Process Industries, vol. 26, pp. 1466-1483, 2013/11/01/ 2013.
J. Nguejio, J. Crépin, C. Duhamel, F. Gaslain, C. Guerre, F. Jomard, et al., "Diffusion processes as possible mechanisms for Cr depletion at SCC crack tip," in Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems–Water Reactors, 2019, pp. 337-357.
Y. Xu, Y. Gu, W. Zhang, Y. Shi, and K. K. Volodymyr, "Stress-assisted corrosion behaviour of GH3535 alloy in FLiNaK molten salt environment," 2022.
A. Fattah-alhosseini, A. Saatchi, M. A. Golozar, and K. Raeissi, "The transpassive dissolution mechanism of 316L stainless steel," Electrochimica acta, vol. 54, pp. 3645-3650, 2009.
J. D. Henderson, X. Li, D. W. Shoesmith, J. J. Noël, and K. Ogle, "Molybdenum surface enrichment and release during transpassive dissolution of Ni-based alloys," Corrosion Science, vol. 147, pp. 32-40, 2019.
K. Lakkam, S. M.Kerur, and A. Shirahatti, "Effect of pitting corrosion on the mechanical properties of 316 grade stainless steel," Materials Today: Proceedings, vol. 27, pp. 497-502, 2020/01/01/ 2020.
T. Voisin, R. Shi, Y. Zhu, Z. Qi, M. Wu, S. Sen-Britain, et al., "Pitting corrosion in 316L stainless steel fabricated by laser powder bed fusion additive manufacturing: a review and perspective," JOM, pp. 1-22, 2022.
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Copyright (c) 2024 Gaurav Vithalani, Stuart Bell, Geoffrey Will, Theodore A. Steinberg, Richard Clegg, Rezwanul Haque
This work is licensed under a Creative Commons Attribution 4.0 International License.
Accepted 2024-06-19
Published 2024-09-16
