Corrosion Behavior of a Novel Alumina-forming-austenitic Stainless Steel Exposed to Supercritical Water

Sun Dayun; Gao Yang; Zhang Lefu; Han Zhongli; Guo Xianglong

doi:10.13832/j.jnpe.2023.05.0244

Volume 44 Issue 5

Oct. 2023

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Sun Dayun, Gao Yang, Zhang Lefu, Han Zhongli, Guo Xianglong. Corrosion Behavior of a Novel Alumina-forming-austenitic Stainless Steel Exposed to Supercritical Water[J]. Nuclear Power Engineering, 2023, 44(5): 244-250. doi: 10.13832/j.jnpe.2023.05.0244

Citation:

Sun Dayun, Gao Yang, Zhang Lefu, Han Zhongli, Guo Xianglong. Corrosion Behavior of a Novel Alumina-forming-austenitic Stainless Steel Exposed to Supercritical Water[J]. Nuclear Power Engineering, 2023, 44(5): 244-250. doi: 10.13832/j.jnpe.2023.05.0244

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Corrosion Behavior of a Novel Alumina-forming-austenitic Stainless Steel Exposed to Supercritical Water

doi: 10.13832/j.jnpe.2023.05.0244

School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

Received Date: 2022-11-29
Rev Recd Date: 2022-12-29
Publish Date: 2023-10-13

Abstract

Abstract

In order to enrich the research data on the corrosion behavior of alumina-forming-austenitic stainless steel (AFAs) in the supercritical water environment and provide support for SCWR cladding material evaluation, this study conducted the supercritical water corrosion test at 600℃/25 MPa for the independently designed AFAs, and analyzed its corrosion behavior by combining the microscopic analysis and characterization methods. The results show that the corrosion weight gain of AFAs exposed for 1000 h is 34 mg/dm², about half of that of 310S steel under the same conditions. There is a double-layer oxide forming on surface of AFAs. The outer layer mainly consists of Fe₂O₃ and Ni-rich spinel, and the inner layer is mainly composed of Cr₂O₃. Alumina exists in the layer as discrete particles, hindering the diffusion process and promoting the formation of Cr₂O₃. Therefore, AFAs in this study showed excellent corrosion resistance.
- Alumina-forming-austenitic stainless steel,
- Supercritical water,
- Corrosion,
- 310S steel

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References(14)

References

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