工程科学学报，第41卷，第5期：618-624,2019年5月 Chinese Journal of Engineering,Vol.41,No.5:618-624,May 2019 D0L:10.13374/j.issn2095-9389.2019.05.008;htp:/journals.usth.edu.cm 外加拉应力对13Cr马氏体不锈钢的腐蚀行为影响 张慧娟”，赵密峰)，张雷)四，马磊)，王亚文)，岳小琪)，路民旭) 1)北京科技大学新材料技术研究院，北京1000832)中国石油塔里木油田公司，库尔勒841000 3)中车北京二七机车有限公司，北京100072 ☒通信作者，E-mail:Zhanglei(@usth.cdu.cm 摘要采用电化学测试手段（开路电位、交流阻抗谱及动电位极化曲线测试），结合接触角测试及体视显微镜微观形貌观察 探究在80gL1NaC1溶液中拉应力对[80-13C马氏体不锈钢饨化膜溶解与再修复机制的影响.结果表明，拉应力大小与 [80-13Cr的钝化特性存在正相关关系.随着外加拉应力的增大，L80-13Cr马氏体不锈钢的开路电位负移，电子转移电阻藏 小，线性极化电阻减小，反应速率随着拉应力的增大而增大.而L80-13C马氏体不锈钢在高电位下再纯化形成的钝化区会缩 短，自腐蚀电位降低，维钝电流密度增加.接触角测试和体视显微镜微观形貌观察发现，拉应力使得表面接触角减小，不锈钢 表面容易发生点蚀.外加拉应力使得[80-13C马氏体不锈钢的表面能增加，促进钝化膜的溶解，并且抑制钝化膜的再生，导 致材料耐蚀性降低. 关键词13Cr不锈钢：拉应力：钝化特性：表面活性 分类号TG142.71 Effect of tensile stress on corrosion behavior of 13Cr martensitic stainless steel ZHANG Hui--iuan',ZHAO Mi-feng2》,ZHANG Lei▣，MA Lei,WANG Ya-en3》,YUE Xiao-gi,LU Min--xu 1)Institute for Advanced Materials and Technology,University of Science and Technology Beijing.Beijing 100083,China 2)PetroChina Traim Oilfield Company,Korla 841000,China 3)CRRC Beijing Locomotive Co.,Ltd.,Beijing 100072,China Corresponding author,E-mail:Zhanglei@ustb.edu.cn ABSTRACI Tubes in deep wells are subjected to the mixed effects of the environment and stress and thus suffer many failures. Therefore,studying the corrosion of materials under stress deformation is necessary.This paper aims to investigate the effect of applied tensile stress on the dissolution of passive film and the repair mechanism of 180-13Cr martensitic stainless steel in solution of 80g.L sodium chloride.Electrochemical tests were employed for measurements,where the main test measurements include open circuit poten- tial (OCP),electrochemical impedance spectra (EIS),and potentiodynamic polarization tests.Contact angle measurement was com- bined with microscopic morphology analysis (Zoom stereo microscope)to investigate the surface activity.The test results show that there is the positive relation between applied tensile stress and the passivation characteristic of 180-13Cr martensitic stainless steel. Increase in the applied tensile stress negatively shifts the OCP value of 180-13Cr martensitic stainless steel,decreases the electron transfer resistance (R)and polarization resistance (R),and increases the rate of reaction;however,the passivation region signifi- cantly reduces,the passivation current density (E)increases,and the self-corrosion current density decreases,which forms at a high potential.The results of contact angle test and microscopic morphology analysis show that the applied tensile stress reduces the surface contact angle and promotes the pitting of 180-13Cr martensitic stainless steel.Applied tensile stress can increase the surface 收稿日期：2018-05-02 基金项目：国家自然科学基金面上资助项目(51371034)：国家科技重大专项资助项目(2016ZX05028-004005)工程科学学报,第 41 卷,第 5 期:618鄄鄄624,2019 年 5 月 Chinese Journal of Engineering, Vol. 41, No. 5: 618鄄鄄624, May 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 05. 008; http: / / journals. ustb. edu. cn 外加拉应力对 13Cr 马氏体不锈钢的腐蚀行为影响 张慧娟1) , 赵密峰2) , 张 雷1)苣 , 马 磊2) , 王亚文3) , 岳小琪1) , 路民旭1) 1) 北京科技大学新材料技术研究院, 北京 100083 2) 中国石油塔里木油田公司, 库尔勒 841000 3) 中车北京二七机车有限公司, 北京 100072 苣通信作者, E鄄mail: Zhanglei@ ustb. edu. cn 摘 要 采用电化学测试手段(开路电位、交流阻抗谱及动电位极化曲线测试),结合接触角测试及体视显微镜微观形貌观察 探究在 80 g·L - 1 NaCl 溶液中拉应力对 L80鄄鄄13Cr 马氏体不锈钢钝化膜溶解与再修复机制的影响. 结果表明,拉应力大小与 L80鄄鄄13Cr 的钝化特性存在正相关关系. 随着外加拉应力的增大,L80鄄鄄13Cr 马氏体不锈钢的开路电位负移,电子转移电阻减 小,线性极化电阻减小,反应速率随着拉应力的增大而增大. 而 L80鄄鄄13Cr 马氏体不锈钢在高电位下再钝化形成的钝化区会缩 短,自腐蚀电位降低,维钝电流密度增加. 接触角测试和体视显微镜微观形貌观察发现,拉应力使得表面接触角减小,不锈钢 表面容易发生点蚀. 外加拉应力使得 L80鄄鄄13Cr 马氏体不锈钢的表面能增加,促进钝化膜的溶解,并且抑制钝化膜的再生,导 致材料耐蚀性降低. 关键词 13Cr 不锈钢; 拉应力; 钝化特性; 表面活性 分类号 TG142郾 71 收稿日期: 2018鄄鄄05鄄鄄02 基金项目: 国家自然科学基金面上资助项目(51371034); 国家科技重大专项资助项目(2016ZX05028鄄004鄄005) Effect of tensile stress on corrosion behavior of 13Cr martensitic stainless steel ZHANG Hui鄄juan 1) , ZHAO Mi鄄feng 2) , ZHANG Lei 1)苣 , MA Lei 2) , WANG Ya鄄wen 3) , YUE Xiao鄄qi 1) , LU Min鄄xu 1) 1) Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2) PetroChina Traim Oilfield Company, Korla 841000, China 3) CRRC Beijing Locomotive Co. , Ltd. , Beijing 100072, China 苣Corresponding author, E鄄mail: Zhanglei@ ustb. edu. cn ABSTRACT Tubes in deep wells are subjected to the mixed effects of the environment and stress and thus suffer many failures. Therefore, studying the corrosion of materials under stress deformation is necessary. This paper aims to investigate the effect of applied tensile stress on the dissolution of passive film and the repair mechanism of L80鄄鄄13Cr martensitic stainless steel in solution of 80 g·L - 1 sodium chloride. Electrochemical tests were employed for measurements, where the main test measurements include open circuit poten鄄 tial (OCP), electrochemical impedance spectra (EIS), and potentiodynamic polarization tests. Contact angle measurement was com鄄 bined with microscopic morphology analysis (Zoom stereo microscope) to investigate the surface activity. The test results show that there is the positive relation between applied tensile stress and the passivation characteristic of L80鄄鄄13Cr martensitic stainless steel. Increase in the applied tensile stress negatively shifts the OCP value of L80鄄鄄 13Cr martensitic stainless steel, decreases the electron transfer resistance (Rt) and polarization resistance (Rp ), and increases the rate of reaction; however, the passivation region signifi鄄 cantly reduces, the passivation current density (Ecorr ) increases, and the self鄄corrosion current density decreases, which forms at a high potential. The results of contact angle test and microscopic morphology analysis show that the applied tensile stress reduces the surface contact angle and promotes the pitting of L80鄄鄄13Cr martensitic stainless steel. Applied tensile stress can increase the surface