Journal
SCRIPTA MATERIALIA
Volume 197, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2021.113790
Keywords
Molten salt corrosion; Electron energy loss spectroscopy; Oxidation state mapping; Principal component analysis; Multiple linear least squares fitting
Categories
Funding
- Molten Salts in Extreme Environments Energy Frontier Research Center - U.S. Department of Energy, Office of Science
- DOE [DESC0012704, DEAC0705ID14517, DEAC0500OR22725]
- U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office [DEAC07051D14517]
- DOE Office of Science [DESC0012704]
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This study utilizes EELS to identify the oxidation state of alloying elements in Ni-based alloys after exposure to molten chloride salt systems, and develops an oxidation state mapping technique using principal component analysis and multiple linear least squares fitting.
This work utilizes electron energy loss spectroscopy (EELS) to identify oxidation state of alloying elements in Ni-based alloys after exposure to molten chloride salt systems. Pure Ni and Ni-20Cr model alloy were corroded in molten ZnCl2 and KCl-MgCl2 under argon atmosphere at various temperatures. Oxidation states of Cr (Cr3+) and Ni (Ni2+) in the molten salt after corrosion were determined by monitoring changes in the L-2,L-3 edges of corresponding EELS spectra. Oxidation state mapping technique using principal component analysis and multiple linear least squares fitting in HyperSpy Python package was developed. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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