Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment
	Lutz, Alexander; Liu, Chao; Revilla, Reynier I.; Zhang, Dawei; Liu, Zhiyong; Zhang, Fan; Zhao, Tianliang; Ma, Hongchi; Li, Xiaogang; Terryn, Herman
刊名	CORROSION SCIENCE
	2018
卷号	138 页码:96-104
关键词	Hydrogen-induced Cracking Pitting Corrosion Stainless-steels Nonmetallic Inclusions Electrochemical-behavior Mns Inclusions Pipeline Steel Carbon-steel Initiation Propagation
英文摘要	The influence of Al2O3 inclusions on the localized corrosion behaviour of Q460NH steel was investigated in a simulated marine environment. According to the current sensing atomic force microscopy (CS-AFM) result, there was no galvanic couple between Al2O3 inclusions and the adjacent steel. Therefore, a different mechanism from that traditionally used (considering the galvanic coupling between inclusions and matrix) to explain the selective dissolution of the matrix around inclusions, dominated the pit initiation and propagation process in this system. Electron backscattered diffraction (EBSD) analysis showed a region of high dislocation density around the inclusions. Both microcrevices and the high dislocation density region around inclusions can easily induce localized corrosion. The catalytic-occluded cells and oxygen-concentration cell could accelerate the propagation of the pits. Furthermore, inclusion clusters had a larger negative effect than single inclusions on the corrosion resistance of the steel. Scanning vibrating electrode technique (SVET) measurements confirmed that inclusions play a key role in the corrosion process.
学科主题	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17345]
专题	2018专题
推荐引用方式 GB/T 7714	Lutz, Alexander,Liu, Chao,Revilla, Reynier I.,et al. Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment[J]. CORROSION SCIENCE,2018,138:96-104.
APA	Lutz, Alexander.,Liu, Chao.,Revilla, Reynier I..,Zhang, Dawei.,Liu, Zhiyong.,...&Terryn, Herman.(2018).Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment.CORROSION SCIENCE,138,96-104.
MLA	Lutz, Alexander,et al."Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment".CORROSION SCIENCE 138(2018):96-104.