Microstructure and Corrosion Resistance to H2S in the Welded Joints of X80 Pipeline Steel

被引：13
|
作者：
Wang, Jian-Bao [1 ]
Xiao, Guang-Chun [1 ]
Zhao, Wei [1 ]
Zhang, Bing-Rong [1 ]
Rao, Wei-Feng [1 ]
机构：
[1] Shandong Acad Sci, Coll Mech & Automot Engn, Qilu Univ Technol, Jinan 250353, Peoples R China
来源：
METALS | 2019年 / 9卷 / 12期
基金：
中国博士后科学基金;
关键词：
X80 pipeline steel; submerged arc welded joint; H2S corrosion; MICRO-ELECTROCHEMICAL CHARACTERIZATION; HYDROGEN PERMEATION; MECHANICAL-PROPERTIES; STRESS-CORROSION; PARTIAL-PRESSURE; TUBE STEEL; BEHAVIOR; SULFIDE; CRACKING; ENVIRONMENT;
D O I：
10.3390/met9121325
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and corrosion resistance in H2S environments for various zones of X80 pipeline steel submerged arc welded joints were studied. The main microstructures in the base metal (BM), welded metal (WM), coarse-grained heat-affected zone (CGHAZ), and fine-grained heat-affected zone (FGHAZ) were mainly polygonal ferrite and granular bainite; acicular ferrite with fine grains; granular bainite, ferrite, and martensite/austenite constituents, respectively. The corrosion behavior differences resulted from the microstructure gradients. The results of the micro-morphologies of the corrosion product films and the electrochemical corrosion characteristics in H2S environments, including open circuit potential and electrochemical impedance spectroscopy, showed that the order of corrosion resistance was FGHAZ > BM > WM > CGHAZ.
引用
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页数：10
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