On the possibility of severe corrosion of a Ni-W-Cr alloy in fluoride molten salts at high temperature
| Autor: | Xingtai Zhou, Hua Ai, Leidong Xie, Yanyan Jia, Jianqiang Wang, Miao Shen, Bin Leng, Zhijun Li, Xiang-Xi Ye, Li Jiang, Yiqun Xie |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Metallurgy Alloy FLiNaK 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Electrochemistry Alloy surface Corrosion chemistry.chemical_compound chemistry 0202 electrical engineering electronic engineering information engineering engineering Immersion (virtual reality) General Materials Science 0210 nano-technology Fluoride |
| Zdroj: | Corrosion Science. 149:218-225 |
| ISSN: | 0010-938X |
| Popis: | The corrosion of a Ni-26W-6Cr alloy, as well as GH3535 alloy, in the FLiNaK salts at 800 °C was investigated by static immersion corrosion, combining with the electrochemical measurements and DFT calculation. Results show Cr-depletion layers with maximum depths of about 13 μm form in the near surface of both alloys, and very slight depletion of W and Mo was observed. The excellent corrosion resistance of Ni-26W-6Cr alloy is due to the immunity of W to FLiNaK salts and the low diffusion coefficient of W. Moreover, W and Mo have negligible effects on the diffusion of Cr outwardly to alloy surface. |
| Databáze: | OpenAIRE |
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