DOE OSTI · 1832023
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
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 6 exposed to molten KCl-MgCl 2 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-MgCl 2 . Here, both techniques captured key corrosion events and revealed mechanisms at different time and length scales, potentially bringing greater insights and 10 deeper understanding beyond conventional analysis.
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Bawane, Kaustubh, Liu, Xiaoyang, Gakhar, Ruchi, Woods, Michael, Ge, Mingyuan, Xiao, Xianghui, Lee, Wah-Keat, Halstenberg, Philip, Dai, Sheng, Mahurin, Shannon Mark, Pimblott, Simon M., Wishart, James F., Chen-Wiegart, Yu-chen Karen, He, Lingfeng. 2021-11-20. 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. https://doi.org/10.1016/j.corsci.2021.109962
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