Materials Reports  2020, Vol. 34 Issue (Z2): 334-337 |
| METALS AND METAL MATRIX COMPOSITES |
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| Investigation on the Compatibility of Fe-Ni Magnetic Alloy with High Temperature Sodium |
| ZHANG Jinquan, XU Yongli, XIE Chun, FU Xiaogang, LONG Bin
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| China Institute of Atomic Energy, Beijing 102413, China |
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Abstract Magnetic alloys are suggested to be used as structural materials for passive shut-down system in sodium-cooled fast reactor. When the temperature in the reactor exceeds the Curie temperature of the magnetic alloy, the control rod connected with magnetic alloy would insert into core to shut down the reactor. This paper presents the investigation on the compatibility of Fe-Ni magnetic alloy with high temperature sodium at 530 ℃, 560 ℃ and 600 ℃, respectively. After corrosion tests, a series of examinations including morphology analysis, corrosion rate evaluation, SEM analysis were performed. The results showed that, the weight of all specimens increased slightly after testing, and the average weight gain increased as the temperature rose. According to morphology analysis and EDS line scan analysis, a manganese oxide layer formed on the surface of samples, which could prevent the steel elements dissolving into sodium. No pitting corrosion and intergranular corrosion were detected, the materials showed a good corrosion resistance in sodium at high temperature.
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Published: 08 January 2021
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| About author:: Jinquan Zhang received his B.E. degree in materials science and engineering from the University of Science and Technology Beijing (USTB), received his M.E. degree in nuclear energy science and engineering from China Institute of Atomic Energy (CIAE). He is a se-nior engineer of CIAE. He has published several journal papers as the first author, applied 6 national invention patents and 3 of them were authorized, won a third prize of National Defense Science and Technology Progress Award. His research interests focus on compatibility of fast reactor materials with sodium, design of lead-bismuth eutectic alloy testing facilities and so on.Bin Long born in 1969, Ph. D., graduated from Department of Materials Science and Engineering, EPFL, Switzerland. He is a professor of China Institute of Atomic Energy (CIAE). His main research fields are corrosion properties of nuclear materials, microstructure analysis, liquid metal technology and irradiation properties of materials, etc. |
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