Probing the ionic structure of FLiNaK–ZrF<sub>4</sub> salt mixtures by solid-state NMR

Lan, Rongshan; Liu, Yiyang; Han, Ling; Yang, Jing; Min, Gao; Fu, Xiangyu; Liu, Hongtao; Yuan, Qian

doi:10.1039/d1ra04629b

Cited by 3 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the literature that utilized the ICP-MS or ICP-OES technique to identify metallic cation impurities in FLiNaK, it was expected that a commercial salt mixture may contain between 10 and 60 ppm of Cr ions along with Fe, Ni, Rh etc. 31,[38][39][40][41] This validates the assumption of these ionic activities.…”

Section: ( ) + ↔ ( ) [ ] + −supporting

confidence: 80%

Corrosion Electrochemistry of Chromium in Molten FLiNaK Salt at 600 °C

Chan

Romanovskaia

Hong

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

The paper revisits the corrosion behavior of pure Cr in molten FLiNaK salt at 600°C from the perspective of corrosion electrochemistry. In this work, the potential-dependent, rate-limiting charge-transfer, and salt film-mediated mass-transport controlled regimes of Cr corrosion in FLiNaK at 600°C are investigated. The kinetic and thermodynamic parameters that limit electrodissolution and the consideration of grain orientation on these regimes are elucidated. At low Cr(III) concentrations, the corrosion process is governed by charge transfer control at low overpotentials and is crystal orientation dependent. However, when Cr(III) concentrations are high or when there is a high overpotential, the formation of a metal fluoride salt film on the Cr surface shifts the kinetic behavior to be governed by mass transport control at all anodic potentials with a surface morphology controlled by salt film deposition location and identity. Evan's diagrams were developed to consolidate and elucidate these observations. These findings were supported by an examination of the post-corrosion microstructure, X-ray diffraction of solidified salts, and thermo-kinetics analysis in each corrosion regime.

show abstract