Amorphous and partially-amorphous metal coatings for corrosion resistance in molten chloride salt
| Autor: | Stephen S. Raiman, Evelina Vogli, Riley Parrish, Richard T. Mayes, J. Matt Kurley |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Alloy chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Corrosion law.invention Chromium Coating law Amorphous metal Molten salt reactor Renewable Energy Sustainability and the Environment Metallurgy technology industry and agriculture 021001 nanoscience & nanotechnology Microstructure 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Amorphous solid chemistry engineering 0210 nano-technology |
| Zdroj: | Solar Energy Materials and Solar Cells. 201:110028 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2019.110028 |
| Popis: | Amorphous metal coatings were developed to improve the corrosion resistance of structural alloys in molten salts for use as salt-facing materials in concentrating solar power (CSP) and molten salt reactor (MSR) applications. Three coatings were tested. One Fe-based, fully amorphous coating, and two Ni-based partially amorphous coatings. The candidate coatings were applied to samples made from Ni-based alloy 230, and exposed to KCl–MgCl2 at 750 °C for 300 h in sealed Mo capsules. After exposure, uncoated alloy 230 samples were depleted in chromium near the surface, as measured by SEM-EDS. The attack had an average depth of 33 μm. All three coatings performed well, showing no observable degradation during exposure, despite chromium contents between 20% and 40%. XRD and TEM measurements showed the coatings were fully crystallized after exposure, so the excellent corrosion resistance can likely be attributed to the recrystallized microstructure of the coatings. |
| Databáze: | OpenAIRE |
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