摘要
为了研究稀土元素Ce对X100管线钢显微组织和耐腐蚀性能的影响,利用蔡司显微镜、场发射电子显微镜及其配套的能谱仪和电化学工作站对不同Ce含量的4种试验钢0,1,2,3号(Ce质量分数分别为0,0.0017%,0.0028%,0.0049%)进行测试。结果表明:随着Ce含量的增多,试验钢表面的晶粒尺寸减小,Al2O3夹杂被改性为CeAlO_(3)夹杂和Ce_(2)O_(3)夹杂。浸泡7 d后,4种试验钢的腐蚀电位均比较接近;浸泡30 d后3号试验钢的腐蚀电位较之前提高了8.94%,2号和1号试验钢的腐蚀电位分别较之前提高了6.34%和6.06%;浸泡45 d后,1号试验钢的腐蚀电位较7 d时降低了10.38%,其他3种试验钢的腐蚀电位变化不大。0号试验钢的容抗弧半径随浸泡时间的延长而逐渐减小,3号试验钢的容抗弧半径增大得最为明显。测试结果均表明,Ce含量的增加会提高试验钢的耐腐蚀性能。
For studying the effect of rare earth element Ce on the microstructure and corrosion resistance of X100 pipeline steel,the four kinds of experimental steels with different Ce contents(mass fractions of Ce were 0,0.0017%,0.0028%,and 0.0049%,respectively)was tested by using a Zeiss microscope,field emission electron microscope with accompanying energy spectrometer and electrochemical workstation.Re-sults showed that as the Ce content increased,the grain size on the surface of the test steel decreased,and Al2O3 inclusions were modified to CeAlO_(3)and Ce_(2)O_(3)inclusions.After 7 d of immersion,the corrosion potential of the four test steels was relatively close.After 30 d of immer-sion,the corrosion potential of the No.3 test steel increased by 8.94%compared to before,while the No.2 and No.1 test steels increased by 6.34%and 6.06%,respectively.After immersing for 45 d,the corrosion potential of No.1 test steel decreased by 10.38%compared to the situ-ation at 7 d,while the corrosion potential of the other three test steels exhibited little change.In addition,the capacitance arc radius of No.0 test steel gradually decreased with the prolongation of immersion time,and the increase in the capacitance arc radius of No.3 test steel was the most significant.The above results all indicated that the increase of the Ce content would improve the corrosion resistance of the test steel.
作者
刘鹏
杨吉春
李安鑫
刘香军
杨昌桥
宫磊
LIU Peng;YANG Ji-chun;LI An-xin;LIU Xiang-jun;YANG Chang-qiao;GONG Lei(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《材料保护》
CAS
CSCD
2023年第5期106-112,163,共8页
Materials Protection
基金
国家自然科学基金资助项目(51774190)
内蒙古自治区自然科学基金资助项目(2020MS05072)。
作者简介
通信作者:杨吉春(1963-),博士,教授,主要研究方向为稀土、氮化合金在钢中的应用,电话:0472-5954343,E⁃mail:yangji⁃chun1963@163.com。
