Research on fatigue corrosion behavior of 22MnCrNiMo steel

Dai Yibo; Gao Ping; Guo Yuhang

doi:10.7513/j.issn.1004-7638.2021.02.028

Volume 42 Issue 2

Apr. 2021

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Dai Yibo, Gao Ping, Guo Yuhang. Research on fatigue corrosion behavior of 22MnCrNiMo steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 172-178. doi: 10.7513/j.issn.1004-7638.2021.02.028

Citation:

Dai Yibo, Gao Ping, Guo Yuhang. Research on fatigue corrosion behavior of 22MnCrNiMo steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 172-178. doi: 10.7513/j.issn.1004-7638.2021.02.028

Dai Yibo, Gao Ping, Guo Yuhang. Research on fatigue corrosion behavior of 22MnCrNiMo steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 172-178. doi: 10.7513/j.issn.1004-7638.2021.02.028

Citation:

Dai Yibo, Gao Ping, Guo Yuhang. Research on fatigue corrosion behavior of 22MnCrNiMo steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(2): 172-178. doi: 10.7513/j.issn.1004-7638.2021.02.028

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Research on fatigue corrosion behavior of 22MnCrNiMo steel

doi: 10.7513/j.issn.1004-7638.2021.02.028

Department of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China

Received Date: 2020-09-08
Publish Date: 2021-04-10

Abstract

Abstract

In this paper, the corrosion resistance mechanism and corrosion fatigue performance of R4s (22MnCrNiMo) grade steel were studied by means of seawater coupon test and corrosion fatigue test. The choice of corrosion time was 30 d, 60 d and 90 d, respectively. The experimental results show that in the initial stage of corrosion, the corrosion mechanism of 22MnCrNiMo steel is localized corrosion of pitting corrosion, which changes into uniform corrosion of pitting corrosion as time extends. When the corrosion time reaches to 90 d, the surface of the sample is completely covered with flower-like corrosion products. During the entire corrosion process, the corrosion rate of 22MnCrNiMo steel is between 0.035～0.045 g/(m²·h). The power function expression of corrosion fatigue of 22MnCrNiMo steel is: S=14 000.12×N ^{−0.266 4}, and its fatigue limit is about 190 MPa. Subject to electrochemical effect, alternating stress and aggressive ions effects, the crack propagation speed of the sample increases, and the fracture occurs in advance.
- 22MnCrNiMo steel,
- pitting,
- corrosion resistance,
- corrosion fatigue

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References(19)

References

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