Abstract
Molten salts are being considered for use in a new generation of nuclear reactors. Therefore, any materials selection process necessarily involves corrosion studies to understand the compatibility between the salts of interest and the materials of construction. This project investigated the corrosion behavior of novel Ni-base superalloys in molten chloride salt mixtures at 750°C for 200 hours in an inert atmosphere. Alloy response to the molten salt was examined through mass loss per unit area, analysis of surface phases and microstructural examination of the alloy cross-section along with elemental analysis. The role of critical alloying elements in alloy corrosion behavior was related to the material response to the molten salt. Alloy 6, an aluminum-containing alloy was the most corrosion resistant while Alloy 7, containing titanium additions, also did well. In the absence of these critical alloying elements, Alloy 4, proved to be the least corrosion resistant.
| Original language | English |
|---|---|
| State | Published - 2024 |
| Event | Association for Materials Protection and Performance Annual Conference and Expo 2024 - New Orleans, United States Duration: Mar 3 2024 → Mar 7 2024 |
Conference
| Conference | Association for Materials Protection and Performance Annual Conference and Expo 2024 |
|---|---|
| Country/Territory | United States |
| City | New Orleans |
| Period | 03/3/24 → 03/7/24 |
Funding
The authors gratefully acknowledge financial support from the US DOE Office of Nuclear Energy, Nuclear Energy University Programs [DOE DE-NE0008971; NEUP 20-19367; Subaward from University of Cincinnati; Technical POC, Dr. Sam Sham (INL)]. The SEM images and EDS analysis were made possible through an NSF MRI grant DMR - 1429674. The authors also thank Ulus Ekerman, Joey Tulpinski, Anan S. Hamdan, Karla Sanchez and Jack Webster for their support.
| Funders | Funder number |
|---|---|
| University of Cincinnati | |
| Office of Nuclear Energy | |
| Nuclear Energy University Program | |
| U.S. Department of Energy | NEUP 20-19367, DE-NE0008971 |
| NSF MRI | DMR - 1429674 |
Keywords
- Concentrated Solar Power
- High Temperature Corrosion
- magnesium chloride
- Microstructure
- Molten Salt Corrosion
- Molten Salt Reactors
- Nickel Superalloys
- potassium chloride
- sodium chloride
