Rapid Quenching of Molten Salts as an Approach for the Coordination Characterization of Corrosion Products

Juho Lehmusto; J. Matthew Kurley; Ercan Cakmak; James R. Keiser; Daniel Lindberg; Markus Engblom; Bruce A. Pint; Stephen S. Raiman

doi:10.1080/00295639.2023.2204175

Rapid Quenching of Molten Salts as an Approach for the Coordination Characterization of Corrosion Products

Juho Lehmusto, J. Matthew Kurley, Ercan Cakmak, James R. Keiser, Daniel Lindberg, Markus Engblom, Bruce A. Pint, Stephen S. Raiman

Research output: Contribution to journal › Article › peer-review

Abstract

A new apparatus was built to rapidly cool molten salts in liquid argon to prevent contamination during quenching and enable new insight into the structure in the liquid state. To test the applicability of the apparatus, several industrially relevant chloride salt compositions were first melted, rapidly solidified, and then characterized. The design proved applicable for the rapid quenching of molten salt. Furthermore, the structure of the apparatus prevented exposure of the rapidly quenched salt to impurities (humidity, oxygen, etc.). X-ray diffraction of salt specimens cooled with and without liquid argon showed differences including a structure further from the expected stoichiometric equilibrium with rapid cooling. Of particular interest is the chemical state of metallic impurities, and this may be probed using electron paramagnetic resonance.

Original language	English
Pages (from-to)	727-734
Number of pages	8
Journal	Nuclear Science and Engineering
Volume	198
Issue number	3
DOIs	https://doi.org/10.1080/00295639.2023.2204175
State	Published - 2024

Funding

This work has been carried out within the Academy of Finland project “Initiation and Propagation of High-Temperature Corrosion Reactions in Complex Oxygen-Containing Environments” (decision number 348963) and the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy.

Funders	Funder number
U.S. Department of Energy
Oak Ridge National Laboratory
Academy of Finland	348963

Keywords

Molten chlorides
crystal structure
high-temperature corrosion
solidification process

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10.1080/00295639.2023.2204175

Cite this

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abstract = "A new apparatus was built to rapidly cool molten salts in liquid argon to prevent contamination during quenching and enable new insight into the structure in the liquid state. To test the applicability of the apparatus, several industrially relevant chloride salt compositions were first melted, rapidly solidified, and then characterized. The design proved applicable for the rapid quenching of molten salt. Furthermore, the structure of the apparatus prevented exposure of the rapidly quenched salt to impurities (humidity, oxygen, etc.). X-ray diffraction of salt specimens cooled with and without liquid argon showed differences including a structure further from the expected stoichiometric equilibrium with rapid cooling. Of particular interest is the chemical state of metallic impurities, and this may be probed using electron paramagnetic resonance.",

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AU - Lehmusto, Juho

AU - Kurley, J. Matthew

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AU - Keiser, James R.

AU - Lindberg, Daniel

AU - Engblom, Markus

AU - Pint, Bruce A.

AU - Raiman, Stephen S.

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AB - A new apparatus was built to rapidly cool molten salts in liquid argon to prevent contamination during quenching and enable new insight into the structure in the liquid state. To test the applicability of the apparatus, several industrially relevant chloride salt compositions were first melted, rapidly solidified, and then characterized. The design proved applicable for the rapid quenching of molten salt. Furthermore, the structure of the apparatus prevented exposure of the rapidly quenched salt to impurities (humidity, oxygen, etc.). X-ray diffraction of salt specimens cooled with and without liquid argon showed differences including a structure further from the expected stoichiometric equilibrium with rapid cooling. Of particular interest is the chemical state of metallic impurities, and this may be probed using electron paramagnetic resonance.

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Rapid Quenching of Molten Salts as an Approach for the Coordination Characterization of Corrosion Products

Abstract

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Keywords

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