摘要
运输含氢气氛的钢管会发生氢腐蚀而性能受损。本研究通过分析原子氢渗透扩散机理,选取常用的三种钢管(20#,16Mn,X52)进行Devanathane–Stachurski渗氢实验。采用扫描电子显微镜分析渗氢后钢材形貌,并以动电位极化曲线比较渗氢前后自腐蚀电位和电流的变化。结果表明:20#钢的氢扩散系数最大,X52最小。随着充氢电流密度增大与充氢时间增长,钢材腐蚀程度也加剧。动电位极化曲线测试表明,16Mn自腐蚀电流上升两个数量级,性能下降明显;X52钢的抗腐蚀性较好,性能下降最少。
The steel pipe transporting hydrogen-containing atmosphere will suffer from hydrogen corrosion slowly and its performance downgrades.In this study,by analyzing the mechanism of atomic hydrogen permeation and diffusion,three commonly used steel pipes(20#,16Mn and X52)were selected for Devanathane-Stachurski hydrogen permeation experiment.The morphology of steel after hydrogen permeation was analyzed by scanning electron microscope,and the changes of self corrosion potential and current before and after hydrogen permeation were compared by potentiodynamic polarization curve.The results show that the hydrogen diffusion coefficient of 20#steel is the largest and X52 is the smallest.With the increase of hydrogen charging current density and hydrogen charging time,the corrosion degree of steel also intensifies.The potentiodynamic polarization curve test shows that the self corrosion current of 16Mn increases by two orders of magnitude and the performance decreases obviously;X52 steel has good corrosion resistance and the performance degradation is the least.
作者
仇文杰
李国敏
熊海燕
于文涛
兰雪影
孙晨
李冰
QIU Wenjie;LI Guomin;XIONG Haiyan;YU Wentao;LAN Xueying;SUN Chen;LI Bing(School of Mechanical and Power Engineering,East China University of Technology,Shanghai 200237,China;State Power Investment Group Science and Technology Research Institute Co.,Ltd,Beijing 102209,China)
出处
《力学与实践》
北大核心
2022年第4期776-785,共10页
Mechanics in Engineering
关键词
管道传输
管线钢
氢扩散系数
氢腐蚀失效
pipeline transmission
pipeline steel
hydrogen diffusion coefficient
hydrogen corrosion failure
