NIMTE OpenIR  > 2018专题
Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment
Liu, Chao; Revilla, Reynier I.; Zhang, Dawei; Liu, Zhiyong; Lutz, Alexander; Zhang, Fan; Zhao, Tianliang; Ma, Hongchi; Li, Xiaogang; Terryn, Herman
2018
Source PublicationCORROSION SCIENCE
Volume138Pages:96-104
AbstractThe 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.
KeywordHydrogen-induced Cracking Pitting Corrosion Stainless-steels Nonmetallic Inclusions Electrochemical-behavior Mns Inclusions Pipeline Steel Carbon-steel Initiation Propagation
Subject AreaMaterials Science ; Metallurgy & Metallurgical Engineering
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/17345
Collection2018专题
Recommended Citation
GB/T 7714
Liu, Chao,Revilla, Reynier I.,Zhang, Dawei,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 Liu, Chao.,Revilla, Reynier I..,Zhang, Dawei.,Liu, Zhiyong.,Lutz, Alexander.,...&Terryn, Herman.(2018).Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment.CORROSION SCIENCE,138,96-104.
MLA Liu, Chao,et al."Role of Al2O3 inclusions on the localized corrosion of Q460NH weathering steel in marine environment".CORROSION SCIENCE 138(2018):96-104.
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