Reasearch on Corrosion Resistance of Containment Steel Liner in Simulated Concrete Pore Solution

Guo Junying; Chen Shenggang; Li Zhongcheng; Liu Jinlong; Zhou Chuanbo

doi:10.13832/j.jnpe.2025.01.0199

Volume 46 Issue 1

Feb. 2025

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Article Navigation > Nuclear Power Engineering > 2025 > 46(1): 199-208

Guo Junying, Chen Shenggang, Li Zhongcheng, Liu Jinlong, Zhou Chuanbo. Reasearch on Corrosion Resistance of Containment Steel Liner in Simulated Concrete Pore Solution[J]. Nuclear Power Engineering, 2025, 46(1): 199-208. doi: 10.13832/j.jnpe.2025.01.0199

Citation:

Guo Junying, Chen Shenggang, Li Zhongcheng, Liu Jinlong, Zhou Chuanbo. Reasearch on Corrosion Resistance of Containment Steel Liner in Simulated Concrete Pore Solution[J]. Nuclear Power Engineering, 2025, 46(1): 199-208. doi: 10.13832/j.jnpe.2025.01.0199

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Reasearch on Corrosion Resistance of Containment Steel Liner in Simulated Concrete Pore Solution

doi: 10.13832/j.jnpe.2025.01.0199

1.
China Nuclear Power Design Co., Ltd. (Shenzhen), Shenzhen, Guangdong, 518031, China
2.
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China
3.
Yunnan Design Institute Group Survey Institute Co., Ltd., Kunming, 650100, China

Received Date: 2024-03-25
Rev Recd Date: 2024-05-04
Publish Date: 2025-02-15

Abstract

Abstract

Aiming at the special P265GH low alloy steel (CSL) for nuclear power plant containment steel liner, the passivation and de-passivation effects of CSL in saturated Ca(OH)₂ solution were investigated using electrochemical and X-ray photoelectron spectroscopy (XPS) analysis methods, and the corrosion resistance of CSL was compared with that of low carbon steel (Q235B) and 304 stainless steel (304SS). The results show that, compared with Q235B and 304SS, CSL has higher passivation efficiency in simulated concrete pore solution, but the low Fe²⁺/Fe³⁺ ratio in the passivation film leads to poor corrosion resistance, and the critical chloride ion concentration of CSL (0.16~0.2 mol/L) is much smaller than that of Q235b (0.3 mol/L). The de-passivation effect of chloride ions mainly affects the electric double layer structure on the surface of the specimen, which leads to the increase of its effective capacitance and the sharp decrease of charge transfer resistance. The passive film formed on the surface of 304SS is composed of Fe and Cr oxide and hydroxide, which has higher corrosion resistance.
- Containment steel liner,
- Simulated concrete pore solution,
- Passivation effect,
- De-passivation effect

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References(40)

References

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