Corrosion resistance and mechanism of X100 pipeline steel laser-metal active gas hybrid welds with Cr containing welding wire in NS4 solution

被引：8
|
作者：
Qi, Xiaonan [1 ,2 ]
Huan, Pengcheng [1 ]
Chen, Xiaming [3 ]
Wang, Xiaonan [3 ]
Liu, Zhenguang [4 ]
Shen, Xinjun [3 ]
Di, Hongshuang [1 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
[2] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
[3] Soochow Univ, Sch Iron & Steel, Suzhou 215002, Peoples R China
[4] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212000, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 221卷
基金：
中国国家自然科学基金;
关键词：
Low-carbon microalloyed steel; Laser-MAG hybrid welding; Corrosion rate; Corrosion mechanism; LOW-ALLOY STEEL; CO2; CORROSION; HEAT INPUT; MICROSTRUCTURE; BEHAVIOR; CHROMIUM; TOUGHNESS;
D O I：
10.1016/j.corsci.2023.111329
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion mechanism of pipeline steel laser-metal active gas (MAG) hybrid welds have been widely con-cerned with its applied in pipeline welding. The corrosion mechanism of X100 pipeline steel laser-MAG hybrid welds with Cr containing welding wire in NS4 solution was investigated. The corrosion products of weld metal (WM) had a double-layer structure, of which the outer and the inner layer were composed of FeOOH and Cr (OH)3 , respectively. Compared with the base metal (BM), WM had higher Cr content and more homogeneous microstructure, so it can form dense corrosion layer, making its corrosion resistance reach the level of the BM.
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收藏
页数：12
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