| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Corrosion of Zircaloy-2 in Molten LiCl-xLi2O at 650 °C |
| Author(s) |
Vineeth Kumar Gattu, Evan Wu, William L. Ebert |
| On-Site Speaker (Planned) |
Vineeth Kumar Gattu |
| Abstract Scope |
Coupon and electrochemical corrosion tests were conducted to study the corrosion behavior of Zircaloy-2 in molten LiCl salt with small amounts of added Li2O at 650 °C. Small sections of Zircaloy-2 cladding were used as working electrodes in a standard three-electrode cell with a Ni counter electrode and Ni|NiO reference electrode. Potentiodynamic polarization (PD) scans and potentiostatic (PS) tests were conducted in salts with Li2O contents between 1-10 wt%. Series of PS tests were performed at voltages between -1.6 and -0.6 V vs Ni|NiO with periodic electrochemical impedance spectroscopy analyses to measure Zircaloy corrosion rates under different redox conditions and detect the formation of oxide layers, secondary phases, and the possible reduction of salt constituents. The electrochemical results and microscopic analyses of the corroded surface and corrosion products will be discussed in terms of the effects of salt composition on the corrosion processes and kinetics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Environmental Effects, Characterization |