| Corrosion effect of Fe- and Ni-based alloys for molten salt reactors according to additional trivalent salt |
| Su Hyeong Kim1, Jisu Na1, Sung Joong Kim3, Dong-Joo Kim2, Young Soo Yoon1 |
1Department of Materials Science and Engineering, Gachon University, Seongnam-si, Gyeonggi-do, 13120, Republic of Korea
2Materials Research and Education Center, Auburn University, 275 Wilmore Labs, Auburn, AL, 36849, USA
3Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-Ro, Seongdong-Gu, Seoul, 04763, Republic of Korea |
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Received: August 12, 2024; Revised: November 3, 2024 Accepted: November 15, 2024. Published online: April 4, 2025.
*Su Hyeong Kim and Jisu Na contributed equally to this work. |
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| ABSTRACT |
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The objective of this study is to find an alloy with excellent corrosion resistance that can be used as a structural material for molten salt reactors (MSRs). For this purpose, a corrosion test is conducted using Fe- and Ni-based alloys with different Mo and Cr contents in a chlorine-based molten salt. The corrosion behaviors of 316L stainless steel (SUS316L), Hastelloy C-276, and Hastelloy N are compared by conducting an accelerated experiment at a temperature higher than the operating temperature of the MSR in the presence of oxygen, moisture, and Cl– ions. SUS316L, which has a low Mo content, exhibits corrosion along the grain boundaries, whereas Hastelloy N, which has a low Cr content, exhibits corrosion on the surface. Hastelloy C-276, which has high Cr and Mo contents, exhibits a lower corrosion depth and weight loss rate compared with the other samples. The results reveal that corrosion in a chloride environment depends on the Cr and Mo contents. |
| Key words:
Molten Salt Reactor (MSR) · Corrosion Resistance · Chlorine-based salt · Fe-based alloy · Ni-based alloy |
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