Unexpected accelerated corrosion of Cr in Ni-xW-6Cr alloy with W content increasing
Source abstract
Abstract
Abstract The influence of W content upon corrosion of Ni-xW-6Cr alloys in molten FLiNaK salts at 850 °C was examined. The results indicate a significantly greater depletion of Cr and W from Ni-xW-6Cr alloys with higher W contents in the molten FLiNaK salt, which mainly results from the increasing activities of W and Cr in the alloy with the W content increasing. The high concentrations of oxygen, Ni and Fe impurities further accelerate the corrosion of W and Cr from the alloy by providing more corrosion vacancies as diffusion paths in the alloy's near surface area.
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Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · High Temperature Alloys and Creep · Fusion materials and technologies
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References (26)
Show source-provided references
1. Molten salts database for energy applications10.1016/j.cep.2013.07.008 ↗
2. Molten fluorides for nuclear applications10.1016/S1369-7021(10)70222-4 ↗
3. Review of technology: thermochemical energy storage for concentrated solar power plants10.1016/j.rser.2015.12.364 ↗
4. The high-temperature corrosion of Hastelloy N alloy (UNS N10003) in molten fluoride salts analysed by STXM, XAS, XRD, SEM, EPMA, TEM/EDS10.1016/j.corsci.2016.02.010 ↗
5. Corrosion in the molten fluoride and chloride salts and materials development for nuclear applications10.1016/j.pmatsci.2018.05.003 ↗
6. 12 - Corrosion in Molten Salts
7. D.E. Holcomb, G. Muralidharan, D.F. Wilson, High Strength Alloys for High Temperature Service in Liquid-Salt Cooled Energy Systems, United States Patent Publication, US9540714 B2, (2017).
8. Corrosion of Incoloy 800H alloys with nickel cladding in FLiNaK salts at 850 °C10.1016/j.corsci.2018.01.026 ↗
9. Investigation on corrosion behavior of Ni-based alloys in molten fluoride salt using synchrotron radiation techniques10.1016/j.jnucmat.2013.04.056 ↗
10. First steps toward predicting corrosion behavior of structural materials in molten salts10.1016/j.jnucmat.2020.152755 ↗
11. Intermediate temperature embrittlement of one new Ni-26W-6Cr based superalloy for molten salt reactors10.1016/j.msea.2016.04.032 ↗
12. Effect of tungsten content on the microstructure and tensile properties of Ni–xW–6Cr alloys10.1016/j.msea.2016.01.010 ↗
13. The molten salt reactor (MSR) in generation IV: overview and perspectives10.1016/j.pnucene.2014.02.014 ↗
14. S. Delpech, E. Merle-Lucotte, T. Auger, X. Doligez, D. Heuer, G.S. Picard, MSFR: material issues and the effect of chemistry control in: GIF Symposium, Paris, 2009, pp. 201–208.
15. On the possibility of severe corrosion of a Ni–W–Cr alloy in fluoride molten salts at high temperature10.1016/j.corsci.2019.01.012 ↗
16. Metallic impurities induced corrosion of a Ni-26W-6Cr alloy in molten fluoride salts at 850 °C10.1016/j.corsci.2020.109079 ↗
17. Williams · 2006
18. Aggregation and data analysis of corrosion studies in molten chloride and fluoride salts10.1016/j.jnucmat.2018.07.036 ↗
19. Compatibility of container materials with Cr in molten FLiNaK salt10.1016/j.jfluchem.2014.09.010 ↗
20. Influence of graphite-alloy interactions on corrosion of Ni–Mo–Cr alloy in molten fluorides10.1016/j.jnucmat.2018.03.001 ↗
21. Corrosion of metals by molten salts in heat-treatment processes10.1007/BF00699649 ↗
22. Long-term corrosion behaviors of Hastelloy-N and Hastelloy-B3 in moisture-containing molten FLiNaK salt environments10.1016/j.jnucmat.2013.11.045 ↗
23. Glicksman · 2000 · 312
24. High-temperature corrosion of UNS N10003 in molten Li2BeF4(FLiBe) salt10.5006/1657 ↗
25. Stability of binary and ternary M23C6 carbides from first principles10.1016/j.commatsci.2014.09.016 ↗
26. Effects of alloying elements on the corrosion behavior of Ni-based alloys in molten NaCl–KCl–MgCl2 salt at different temperatures10.1016/j.corsci.2018.08.021 ↗