Research on the dynamic corrosion characteristics of ternary nitrocarbonate acid mixed molten salt at high decomposition temperatures

doi:10.19799/j.cnki.2095-4239.2024.1057

Abstract

Abstract:

High-temperature corrosion of molten salt is a critical factor affecting the long-term safe operation of concentrating solar power systems. To investigate the compatibility between molten salt used in the third-generation solar thermal power technology and high-temperature equipment, as well as the impact of flow rate on molten salt corrosion, this study examines the corrosion behavior of ternary nitrocarbonate mixed molten salt with a high decomposition temperature and 347H stainless steel. A dynamic corrosion test platform was established, and a 1000-hour dynamic corrosion test was conducted at 640 ℃ using the weight loss method. The corrosion behavior of 347H stainless steel was analyzed at two flow rates, 0.6 m/s and 2 m/s. The surface morphology and corrosion products were examined using scanning electron microscopy (SEM), X-ray diffraction, and energy-dispersive spectroscopy. The results indicate that oxidation corrosion occurs at both flow rates, with corrosion weight loss (m_mass) increasing as the flow rate increases. After 1000 h, the m_mass values were 17.8407 mg/cm² at 0.6 m/s and 24.6420 mg/cm² and 2 m/s. Additionally, the oxidation layer formed on the stainless steel surface deteriorates more rapidly at higher flow rates, leading to an increased corrosion rate of 347H stainless steel. However, the corrosion rate decreases at a constant flow rate as soaking time increases.

Key words: solar energy, molten salt, corrosion weight loss, dorrosion rate, stainless steel

CLC Number:

TK 514

Xinlong HAN, Yuanwei LU, Yancheng MA, Yuting WU, Cancan ZHANG. Research on the dynamic corrosion characteristics of ternary nitrocarbonate acid mixed molten salt at high decomposition temperatures[J]. Energy Storage Science and Technology, 2025, 14(4): 1386-1393.

Figures/Tables 11

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References 18

1	邵桂萍, 许洪华. 可再生能源综合系统现状与未来发展趋势研究[J]. 太阳能, 2024(7): 127-132. DOI: 10.19911/j.1003-0417. tyn20240606.01.
	SHAO G P, XU H H. Research on present situation and future development trend of renewable energy integrated system[J]. Solar Energy, 2024(7): 127-132. DOI: 10.19911/j.1003-0417.tyn20240606.01.
2	BAIGORRI J, ZAVERSKY F, ASTRAIN D. Massive grid-scale energy storage for next-generation concentrated solar power: A review of the potential emerging concepts[J]. Renewable and Sustainable Energy Reviews, 2023, 185: 113633. DOI: 10.1016/j.rser.2023.113633.
3	刘文彬. 新能源将在国家新型能源体系建设中发挥关键作用[J]. 水电与新能源, 2023, 37(12): 75-78. DOI: 10.13622/j.cnki.cn42-1800/tv.1671-3354.2023.12.018.
	LIU W B. New energy resources: Key roles in the construction of Chinese national new energy system[J]. Hydropower and New Energy, 2023, 37(12): 75-78. DOI: 10.13622/j.cnki.cn42-1800/tv.1671-3354.2023.12.018.
4	PAN G, DING J, YAO Y C, et al. Thermal performance of MgCl₂-NaCl-KCl eutectic salt for the next generation concentrated solar power and correlation between structure and thermophysical properties: Insights from atomic and electronic levels[J]. Solar Energy Materials and Solar Cells, 2024, 276: 113091. DOI: 10. 1016/j.solmat.2024.113091.
5	KEARNEY D, KELLY B, HERRMANN U, et al. Engineering aspects of a molten salt heat transfer fluid in a trough solar field[J]. Energy, 2004, 29(5/6): 861-870. DOI: 10.1016/S0360-5442(03)00191-9.
6	高祺. 宽温域混合熔盐高温腐蚀特性及缓蚀机理研究[D]. 北京: 北京工业大学, 2024.
	GAO Q. Research on high temperature corrosion characteristics and corrosion inhibition mechanism of mixed molten salts with wide temperature range[D]. Beijing: Beijing University of Technology, 2024.
7	GAO Q, LU Y W, JIA J W, et al. Effect of nitrate-carbonate molten salt flow rate for the 347H corrosion behavior[J]. Journal of Physics: Conference Series, 2024, 2760: 012074.
8	马丽娜. 高温熔盐腐蚀行为实验与理论研究[D]. 北京: 北京工业大学, 2022.
	MA L N. Experimental and theoretical study on corrosion behavior of high temperature molten salt[D]. Beijing:Beijing University of Technology, 2022.
9	KRUIZENGA A M, GILL D, LAFORD M, et al. Corrosion of high temperature alloys in solar salt at 400, 500, and 680 ℃[R]. Albuquerque, Livermore: Sandia National Laboratories, 2013.
10	ZAMBONIN P G, DESIMONI E, PALMISANO F, et al. Concerning the electroactivity of hydrogen in nitrate melts: A critical discussion in the light of recent hypotheses and suggestions[J]. Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1984, 161(1): 31-38. DOI: 10.1016/S0022-0728(84)80247-8.
11	MA L N, ZHANG C C, WU Y T, et al. Dynamic corrosion behavior of 316L stainless steel in quaternary nitrate-nitrite salts under different flow rates[J]. Solar Energy Materials and Solar Cells, 2020, 218: 110821. DOI: 10.1016/j.solmat.2020.110821.
12	ZHANG X M, ZHANG C C, WU Y T, et al. Experimental research of high temperature dynamic corrosion characteristic of stainless steels in nitrate eutectic molten salt[J]. Solar Energy, 2020, 209: 618-627. DOI: 10.1016/j.solener.2020.09.034.
13	GARCÍA-MARTÍN G, LASANTA M I, ENCINAS-SÁNCHEZ V, et al. Evaluation of corrosion resistance of A516 Steel in a molten nitrate salt mixture using a pilot plant facility for application in CSP plants[J]. Solar Energy Materials and Solar Cells, 2017, 161: 226-231. DOI: 10.1016/j.solmat.2016.12.002.
14	马丽娜, 吴玉庭, 张灿灿, 等. 奥氏体不锈钢在四元硝酸盐中的动态腐蚀行为研究[J]. 太阳能学报, 2023, 44(3): 497-503. DOI: 10.19912/j.0254-0096.tynxb.2021-1286.
	MA L N, WU Y T, ZHANG C C, et al. Dynamic corrosion behaviors of autennitic stainless steel in quaternary nitrate-niotrite molten salt[J]. Acta Energiae Solaris Sinica, 2023, 44(3): 497-503. DOI: 10.19912/j.0254-0096.tynxb.2021-1286.
15	NISHIKATA A, NUMATA H, TSURU T. Electrochemistry of molten salt corrosion[J]. Materials Science and Engineering: A, 1991, 146(1/2): 15-31. DOI: 10.1016/0921-5093(91)90265-O.
16	BELL S, STEINBERG T, WILL G. Corrosion mechanisms in molten salt thermal energy storage for concentrating solar power[J]. Renewable and Sustainable Energy Reviews, 2019, 114: 109328. DOI: 10.1016/j.rser.2019.109328.
17	LIU Q Y, QIAN J, NEVILLE A, et al. Solar thermal irradiation cycles and their influence on the corrosion behaviour of stainless steels with molten salt used in concentrated solar power plants[J]. Solar Energy Materials and Solar Cells, 2023, 251: 112141. DOI: 10.1016/j.solmat.2022.112141.
18	孙华, 张鹏, 王建强. 传热储热用熔融硝酸盐及其腐蚀问题[J]. 腐蚀科学与防护技术, 2017, 29(5): 567-574. DOI: 10.11903/1002. 6495.2016.258.
	SUN H, ZHANG P, WANG J Q. Corrosion problems related with molten nitrate salts for heat transfer and thermal storage[J]. Corrosion Science and Protection Technology, 2017, 29(5): 567-574. DOI: 10.11903/1002.6495.2016.258.

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