Microstructure Refinement on Crevice Corrosion of High-Speed Rail Steel U75V Visualized by an In Situ Monitoring System

doi:10.3389/fmats.2021.820721

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	Microstructure Refinement on Crevice Corrosion of High-Speed Rail Steel U75V Visualized by an In Situ Monitoring System
	Wang, Jian 2,3,4; Zhang, Binbin 1,3,4; Xu, Weichen 1,3,4; Zhang, Jie 1,3,4; Yang, Lihui 1,3,4; Peng, Zhongbo 2; Hou, Baorong 1,3,4
刊名	FRONTIERS IN MATERIALS
	2022-01-07
卷号	8 页码:12
关键词	microstructure crevice corrosion pearlite cooling rate U75V rail steel interlamellar spacing
ISSN号	2296-8016
DOI	10.3389/fmats.2021.820721
通讯作者	Xu, Weichen(w.xu@qdio.ac.cn) ; Zhang, Jie(zhangjie@qdio.ac.cn)
英文摘要	Rail foot covered by a fastener will suffer from crevice corrosion, leading to thinning and localized attack of crevice interior posing a risk of failure. This work investigated crevice corrosion behavior of a typical pearlitic high-speed rail steel U75V, focusing for the first time on the effect of pearlitic microstructure refinement achieved by heat treatment with different cooling rates 2, 5, and 10 degrees C/s. Under anodic polarization, localized dissolved spots presented on the as-received sample, where crevice corrosion mostly initiated from. For cooling rates 2 and 5 degrees C/s, localized dissolved spots were also observed but crevice corrosion was mostly presented as general corrosion instead of from local spots, ascribed to enhanced tendency of uniform dissolution due to microstructure refinement and homogenization. For cooling rate 10 degrees C/s, crevice corrosion expanded flocculently, ascribed to preferential dissolution of pearlitic nodules with entangled cementite due to over refinement. Crevice corrosion was obviously accelerated by microstructure refinement. Cooling rates 5 and 10 degrees C/s led to the fastest and slowest expansion of the corroded area, respectively, while the corrosion depth was just the opposite based on the same amount of metal loss. This work provides important information regarding the effect of pearlitic microstructure refinement on crevice corrosion and introduces a facile method for in situ monitoring of crevice corrosion.
WOS研究方向	Materials Science
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000756964300001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178014]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Xu, Weichen; Zhang, Jie
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 2.Chongqing Jiaotong Univ, Sch Shipping & Naval Architecture, Chongqing, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jian,Zhang, Binbin,Xu, Weichen,et al. Microstructure Refinement on Crevice Corrosion of High-Speed Rail Steel U75V Visualized by an In Situ Monitoring System[J]. FRONTIERS IN MATERIALS,2022,8:12.
APA	Wang, Jian.,Zhang, Binbin.,Xu, Weichen.,Zhang, Jie.,Yang, Lihui.,...&Hou, Baorong.(2022).Microstructure Refinement on Crevice Corrosion of High-Speed Rail Steel U75V Visualized by an In Situ Monitoring System.FRONTIERS IN MATERIALS,8,12.
MLA	Wang, Jian,et al."Microstructure Refinement on Crevice Corrosion of High-Speed Rail Steel U75V Visualized by an In Situ Monitoring System".FRONTIERS IN MATERIALS 8(2022):12.