Visualizing time-dependent microstructural and chemical evolution during molten salt corrosion of Ni-20Cr model alloy using correlative quasi in situ TEM and in situ synchrotron X-ray nano-tomography

Kaustubh Bawane, Xiaoyang Liu, Ruchi Gakhar, Michael Woods, Mingyuan Ge, Xianghui Xiao, Wah Keat Lee, Philip Halstenberg, Sheng Dai, Shannon Mahurin, Simon M. Pimblott, James F. Wishart, Yu chen Karen Chen-Wiegart, Lingfeng He

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

In situ monitoring of corrosion processes is important to fundamentally understand the kinetics and evolution of materials in harsh environments. A quasi in situ transmission electron microscopy technique was utilized to study microstructural and chemical evolution of a Ni-20Cr disc sample exposed to molten KCl-MgCl2 salt for 60 s in consecutive 20 s iterations. In situ synchrotron X-ray nano-tomography was performed to characterize the morphological evolution of a Ni-20Cr microwire exposed to molten KCl-MgCl2. Both techniques captured key corrosion events and revealed mechanisms at different time and length scales, potentially bringing greater insights and deeper understanding beyond conventional analysis.

Original languageEnglish
Article number109962
JournalCorrosion Science
Volume195
DOIs
StatePublished - Feb 2022

Funding

This work was supported as part of the Molten Salts in Extreme Environments Energy Frontier Research Center, funded by the U.S. Department of Energy , Office of Science. Brookhaven National Laboratory , Idaho National Laboratory, and Oak Ridge National Laboratory are operated under DOE contracts DESC0012704 , DE-AC07-05ID14517 , and DEAC05-00OR22725 , respectively. This research used resources and the Full Field X-ray Imaging (FXI, 18-ID) beamline of the National Synchrotron Light Source II, 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 No. DE-SC0012704 . The authors also acknowledge the U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517 , for use of the resources as part of Nuclear Science User Facilities. The authors thank Yaqiao Wu, and Jeremy Burgener at the Center for Advanced Energy Studies, and Miles Cook, Jayson Bush, Jeffery Bailey at Idaho National Laboratory for their invaluable assistance. The authors acknowledge Dr. Kazuhiro Iwamatsu, Arthur Ronne, Lin-Chieh Yu and Bobby Layne for their assistance during the synchrotron sample preparation. We thank Cheng-Hung Lin for assisting on the tomographic data reconstruction. Chen-Wiegart group members are acknowledged for their participation in the FXI beamtime experiment: Karol Dyro, Dean Yen, Chonghang Zhao and Cheng-Hung Lin, Lin-Chieh Yu and Arthur Ronne. This work was supported as part of the Molten Salts in Extreme Environments Energy Frontier Research Center, funded by the U.S. Department of Energy, Office of Science. Brookhaven National Laboratory, Idaho National Laboratory, and Oak Ridge National Laboratory are operated under DOE contracts DESC0012704, DE-AC07-05ID14517, and DEAC05-00OR22725, respectively. This research used resources and the Full Field X-ray Imaging (FXI, 18-ID) beamline of the National Synchrotron Light Source II, 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 No. DE-SC0012704. The authors also acknowledge the U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517, for use of the resources as part of Nuclear Science User Facilities. The authors thank Yaqiao Wu, and Jeremy Burgener at the Center for Advanced Energy Studies, and Miles Cook, Jayson Bush, Jeffery Bailey at Idaho National Laboratory for their invaluable assistance. The authors acknowledge Dr. Kazuhiro Iwamatsu, Arthur Ronne, Lin-Chieh Yu and Bobby Layne for their assistance during the synchrotron sample preparation. We thank Cheng-Hung Lin for assisting on the tomographic data reconstruction. Chen-Wiegart group members are acknowledged for their participation in the FXI beamtime experiment: Karol Dyro, Dean Yen, Chonghang Zhao and Cheng-Hung Lin, Lin-Chieh Yu and Arthur Ronne.

Keywords

  • Molten salt corrosion
  • X-ray nano-tomography
  • dealloying
  • in situ synchrotron
  • quasi in situ TEM

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