Abstract
This study investigated the effects of adding 1 wt% CrCl2 and VCl2 on Cr corrosion in eutectic MgCl2-KCl at 773 K under an argon atmosphere, using electrochemistry and immersion experiments. The redox potential of V3+/V2+ was more negative than Cr2+/Cr, suggesting that V2+ can protect Cr from dissolution. Additionally, the morphological and chemical evolutions investigated with scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) confirmed the corrosion protection mechanism of adding CrCl2 and VCl2. These findings are crucial for further improving the stability of containment alloys in molten salt applications.
| Original language | English |
|---|---|
| Article number | 112423 |
| Journal | Corrosion Science |
| Volume | 239 |
| DOIs | |
| State | Published - Oct 2024 |
Funding
This work was supported as part of the Molten Salts in Extreme Environments (MSEE) Energy Frontier Research Center, funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences. BNL, ORNL and INL are operated under DOE contracts DE-SC0012704, DE-AC05\u201300OR22725 and DE-AC07\u2013051D14517 respectively. Work at Stony Brook University and the University of Tennessee Knoxville was supported by MSEE through a subcontract from BNL. This work was supported as part of the Molten Salts in Extreme Environments (MSEE) Energy Frontier Research Center, funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences. BNL, ORNL and INL are operated under DOE contracts DE-SC0012704, DE-AC05-00OR22725 and DE-AC07-051D14517 respectively. Work at the University of Tennessee Knoxville was supported by MSEE through a subcontract from BNL. This research used resources, the 6-BM (BMM) beamline of the National Synchrotron Light Source II, a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract DE-SC0012704, the FIB and TEM facilities as part of Nuclear Science User Facilities. The authors are grateful to Dr. Bruce Ravel (National Institute of Standards and Technology), Lead Beamline Scientist at the BMM beamline, for his expertise and support on XAS characterization at the BMM beamline. The authors also thank Professor Yu-chen Karen Chen-Wiegart (Stony Brook University) for her assistance in the BMM beamtime. The authors also thank Yaqiao Wu, Jana Howard, and Jeremy Burgener at the Center for Advanced Energy Studies, and Keth Galloway, Miles Cook, and Jayson Bush at Idaho National Laboratory for their invaluable assistance.
| Funders | Funder number |
|---|---|
| University of Tennessee | |
| U.S. Department of Energy | |
| Office of Science | |
| MSEE | |
| Brookhaven National Laboratory | DE-SC0012704 |
| Basic Energy Sciences | DE-AC05–00OR22725, DE-AC07–051D14517 |
Keywords
- Additives
- Chromium
- Corrosion protection
- Electrochemistry
- MgCl-KCl
- STEM