| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Europium Induced Alloy Corrosion and Cracking in Molten Chloride Salt |
| Author(s) |
Shaoqiang Guo, Jinsuo Zhang |
| On-Site Speaker (Planned) |
Jinsuo Zhang |
| Abstract Scope |
Molten chloride salts can be corrosive to the structural alloys used in nuclear applications where they have been considered as, for example, advanced coolants for molten salt fast reactors, and the electrolyte for reprocessing of spent nuclear fuels. This paper investigated the corrosion of Alloy 709 and Inconel 718 in KCl-LiCl-EuCl3 molten salt under Ar atmosphere at 500°C. Fission product europium was discovered to be very corrosive in molten chlorides. Cyclic voltammetry (CV) and inductively coupled plasma mass spectrometry (ICP-MS) analysis proved significant release of ionic nickel and iron products in the melt. Solid corrosion product powders that consists of metallic nickel and oxides of Cr2O3, FeCr2O4, and NiO were found in the salt solution. Scanning electron microscope (SEM) observed a deposited Ni layer on the alloy surface due to the reduction of Ni(II) in the later stage when Eu(III) was depleted. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |