| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
First Steps Towards Predicting the Corrosion Rates of Structural Materials in Molten Salts |
| Author(s) |
Rishi Pillai, Stephen Raiman, Bruce Pint |
| On-Site Speaker (Planned) |
Rishi Pillai |
| Abstract Scope |
The selection of optimum containment/non-containment materials for molten salt systems is largely based on extensive and costly experimental evaluation with no gain in mechanistic understanding of the corrosion processes. The latter consequently means that the salt/material compatibility can only be verified for the investigated salt chemistries /material combinations and test conditions. There is an imminent need for physics-based models to predict corrosion behavior of materials as a function of salt chemistry, time and temperature.
The aim of the present work was to evaluate the applicability of coupled thermodynamic-kinetic modelling to predict corrosion rates of commonly employed structural materials (ferritic, austenitic steels and Ni-base alloys). Element concentrations and phase distributions were obtained by scanning electron microscopy (SEM/EPMA). Phases were identified by energy/wavelength dispersive X-ray spectroscopy (EDX/WDX) and electron backscatter diffraction (EBSD). The modelling results were validated with experimental data in terms of depth of corrosive attack, phase transformations and Cr-depletion. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |