| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Electrochemical Corrosion of Zircaloy-2 in Molten LiCl |
| Author(s) |
William L. Ebert, Evan Wu, Vineeth Kumar Gattu, James Willit |
| On-Site Speaker (Planned) |
William L. Ebert |
| Abstract Scope |
Electrochemical tests were conducted to assess the corrosion behavior of Zircaloy-2 in several molten LiCl-xLi2O salt mixtures at about 650 °C. Small pieces of Zircaloy-2 cladding secured by Ni leads were used as working electrodes in a standard three-electrode cell with a Ni counter electrode and Ni|NiO reference electrode. The currents were measured and electrochemical impedance spectroscopy analyses performed during 1-h to 7-d potentiostatic holds at voltages between -1.6 and -0.6 V vs Ni|NiO to assess the kinetics of Zircaloy corrosion, degradation and formation of ZrO2 oxide layers, reduction of Li2O, and the possible formation of secondary phases such as Li2ZrO3 in salts with different Li2O contents. Some of the corroded Zircaloy-2 specimens are being examined by using a scanning electron microscope to characterize the corroded surfaces and corrosion layers. The electrochemical results and analyses of corrosion products will be presented and discussed in terms of corrosion processes and kinetics. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |