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Article

Effect of Al–Zn Alloy Coating on Corrosion Fatigue Behavior of X80 Riser Steel

1
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
2
College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China
3
Guangzhou University-Tamkang University Joint Research Centre for Engineering Structure Disaster Prevention and Control, Guangzhou University, Guangzhou 510006, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(9), 1520; https://doi.org/10.3390/ma12091520
Received: 15 April 2019 / Revised: 28 April 2019 / Accepted: 5 May 2019 / Published: 9 May 2019
(This article belongs to the Section Corrosion)
This paper presents a corrosion fatigue cyclic failure test for X80 steel, which has arc sprayed with an Al–Zn coating in natural seawater under different stress levels. We found that the Al–Zn coating can significantly improve the corrosion fatigue resistance and slow the crack initiation of X80 steel. The effect of the Al–Zn coating on the corrosion fatigue crack initiation is mainly attributed to its physical isolation, cathodic protection and residual prestress while the effect on crack propagation is due to its inhibition of the formation and evolution of secondary cracks. Moreover, according to the test results, a new life prediction model for corrosion fatigue based on the damage evolution law is proposed and the effect of corrosion–fatigue coupling damage in the proposed model is also considered. View Full-Text
Keywords: corrosion fatigue; arc spray; Al–Zn coating; crack initiation; crack propagation corrosion fatigue; arc spray; Al–Zn coating; crack initiation; crack propagation
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MDPI and ACS Style

Han, Z.; Huang, X.; Yang, Z. Effect of Al–Zn Alloy Coating on Corrosion Fatigue Behavior of X80 Riser Steel. Materials 2019, 12, 1520. https://doi.org/10.3390/ma12091520

AMA Style

Han Z, Huang X, Yang Z. Effect of Al–Zn Alloy Coating on Corrosion Fatigue Behavior of X80 Riser Steel. Materials. 2019; 12(9):1520. https://doi.org/10.3390/ma12091520

Chicago/Turabian Style

Han, Zhongying, Xiaoguang Huang, and Zhicheng Yang. 2019. "Effect of Al–Zn Alloy Coating on Corrosion Fatigue Behavior of X80 Riser Steel" Materials 12, no. 9: 1520. https://doi.org/10.3390/ma12091520

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