Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging

Xiaoyang Liu; Kaustubh Bawane; Xiaoyin Zheng; Mingyuan Ge; Phillip Halstenberg; Dmitry S. Maltsev; Alexander S. Ivanov; Sheng Dai; Xianghui Xiao; Wah Keat Lee; Lingfeng He; Yu Chen Karen Chen-Wiegart

doi:10.1021/acsami.2c23207

Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging

Xiaoyang Liu, Kaustubh Bawane, Xiaoyin Zheng, Mingyuan Ge, Phillip Halstenberg, Dmitry S. Maltsev, Alexander S. Ivanov, Sheng Dai, Xianghui Xiao, Wah Keat Lee, Lingfeng He, Yu Chen Karen Chen-Wiegart

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9 Scopus citations

Abstract

Understanding the mechanisms leading to the degradation of alloys in molten salts at elevated temperatures is significant for developing several key energy generation and storage technologies, including concentrated solar and next-generation nuclear power plants. Specifically, the fundamental mechanisms of different types of corrosion leading to various morphological evolution characteristics for changing reaction conditions between the molten salt and alloy remain unclear. In this work, the three-dimensional (3D) morphological evolution of Ni-20Cr in KCl-MgCl₂ is studied at 600 °C by combining in situ synchrotron X-ray and electron microscopy techniques. By further comparing different morphology evolution characteristics in the temperature range of 500-800 °C, the relative rates between diffusion and reaction at the salt-metal interface lead to different morphological evolution pathways, including intergranular corrosion and percolation dealloying. In this work, the temperature-dependent mechanisms of the interactions between metals and molten salts are discussed, providing insights for predicting molten salt corrosion in real-world applications.

Original language	English
Pages (from-to)	13772-13782
Number of pages	11
Journal	ACS Applied Materials and Interfaces
Volume	15
Issue number	10
DOIs	https://doi.org/10.1021/acsami.2c23207
State	Published - Mar 15 2023

Funding

This work was supported as part of the Molten Salts in Extreme Environments (MSEE) Energy Frontier Research Center, funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. BNL, INL, and ORNL are operated under DOE contracts DE-SC0012704, DE-AC07-05ID14517, and DE-AC05-00OR22725, respectively. Work at Stony Brook University was supported by MSEE through a subcontract from BNL. This research used resources, including the Full Field X-ray Imaging (FXI, 18-ID) beamline of the National Synchrotron Light Source II and a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract DE-SC0012704. The authors are grateful to Arthur Ronne and Lin-Chieh Yu for their help with the sample preparation. The following present and former Chen-Wiegart group members are acknowledged for conducting beamtime experiments: Cheng-Hung Lin, Chonghang Zhao, Qingkun Meng, and Dean Yen.

Keywords

Ni-based alloy
dealloying
high-temperature corrosion
molten chloride salt
physical and chemical properties

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsami.2c23207

Cite this

Liu, X., Bawane, K., Zheng, X., Ge, M., Halstenberg, P., Maltsev, D. S., Ivanov, A. S., Dai, S., Xiao, X., Lee, W. K., He, L., & Chen-Wiegart, Y. C. K. (2023). Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging. ACS Applied Materials and Interfaces, 15(10), 13772-13782. https://doi.org/10.1021/acsami.2c23207

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title = "Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging",

abstract = "Understanding the mechanisms leading to the degradation of alloys in molten salts at elevated temperatures is significant for developing several key energy generation and storage technologies, including concentrated solar and next-generation nuclear power plants. Specifically, the fundamental mechanisms of different types of corrosion leading to various morphological evolution characteristics for changing reaction conditions between the molten salt and alloy remain unclear. In this work, the three-dimensional (3D) morphological evolution of Ni-20Cr in KCl-MgCl2 is studied at 600 °C by combining in situ synchrotron X-ray and electron microscopy techniques. By further comparing different morphology evolution characteristics in the temperature range of 500-800 °C, the relative rates between diffusion and reaction at the salt-metal interface lead to different morphological evolution pathways, including intergranular corrosion and percolation dealloying. In this work, the temperature-dependent mechanisms of the interactions between metals and molten salts are discussed, providing insights for predicting molten salt corrosion in real-world applications.",

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author = "Xiaoyang Liu and Kaustubh Bawane and Xiaoyin Zheng and Mingyuan Ge and Phillip Halstenberg and Maltsev, {Dmitry S.} and Ivanov, {Alexander S.} and Sheng Dai and Xianghui Xiao and Lee, {Wah Keat} and Lingfeng He and Chen-Wiegart, {Yu Chen Karen}",

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Liu, X, Bawane, K, Zheng, X, Ge, M, Halstenberg, P, Maltsev, DS, Ivanov, AS , Dai, S, Xiao, X, Lee, WK, He, L & Chen-Wiegart, YCK 2023, 'Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging', ACS Applied Materials and Interfaces, vol. 15, no. 10, pp. 13772-13782. https://doi.org/10.1021/acsami.2c23207

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T1 - Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging

AU - Liu, Xiaoyang

AU - Bawane, Kaustubh

AU - Zheng, Xiaoyin

AU - Ge, Mingyuan

AU - Halstenberg, Phillip

AU - Maltsev, Dmitry S.

AU - Ivanov, Alexander S.

AU - Dai, Sheng

AU - Xiao, Xianghui

AU - Lee, Wah Keat

AU - He, Lingfeng

AU - Chen-Wiegart, Yu Chen Karen

PY - 2023/3/15

Y1 - 2023/3/15

N2 - Understanding the mechanisms leading to the degradation of alloys in molten salts at elevated temperatures is significant for developing several key energy generation and storage technologies, including concentrated solar and next-generation nuclear power plants. Specifically, the fundamental mechanisms of different types of corrosion leading to various morphological evolution characteristics for changing reaction conditions between the molten salt and alloy remain unclear. In this work, the three-dimensional (3D) morphological evolution of Ni-20Cr in KCl-MgCl2 is studied at 600 °C by combining in situ synchrotron X-ray and electron microscopy techniques. By further comparing different morphology evolution characteristics in the temperature range of 500-800 °C, the relative rates between diffusion and reaction at the salt-metal interface lead to different morphological evolution pathways, including intergranular corrosion and percolation dealloying. In this work, the temperature-dependent mechanisms of the interactions between metals and molten salts are discussed, providing insights for predicting molten salt corrosion in real-world applications.

AB - Understanding the mechanisms leading to the degradation of alloys in molten salts at elevated temperatures is significant for developing several key energy generation and storage technologies, including concentrated solar and next-generation nuclear power plants. Specifically, the fundamental mechanisms of different types of corrosion leading to various morphological evolution characteristics for changing reaction conditions between the molten salt and alloy remain unclear. In this work, the three-dimensional (3D) morphological evolution of Ni-20Cr in KCl-MgCl2 is studied at 600 °C by combining in situ synchrotron X-ray and electron microscopy techniques. By further comparing different morphology evolution characteristics in the temperature range of 500-800 °C, the relative rates between diffusion and reaction at the salt-metal interface lead to different morphological evolution pathways, including intergranular corrosion and percolation dealloying. In this work, the temperature-dependent mechanisms of the interactions between metals and molten salts are discussed, providing insights for predicting molten salt corrosion in real-world applications.

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Temperature-Dependent Morphological Evolution during Corrosion of the Ni-20Cr Alloy in Molten Salt Revealed by Multiscale Imaging

Abstract

Funding

Keywords

UN SDGs

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