pH值对X100管线钢在CO_(3)^(2-)/HCO_(3)^(-)溶液中的电化学与应力腐蚀行为的影响  

Effect of pH on Electrochemical Corrosion and Stress Corrosion Behavior of X100 Pipeline Steel in CO_(3)^(2-)/HCO_(3)^(-)Solutions

作　　者：李柯萱 宋龙飞 李晓荣 LI Kexuan;SONG Longfei;LI Xiaorong(School of Materials and Chemical Engineering,Ningbo University of Engineering,Ningbo 315211,China;School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China;Institute for Advanced Material and Technology,University of Science and Technology Beijing,Beijing 100083,China;Dagang Oilfield,Tianjin Construction Group Company Limited,Tianjin 300272,China)

机构地区：[1]宁波工程学院材料与化学工程学院,宁波315211 [2]广州大学化学化工学院,广州510006 [3]北京科技大学新材料技术研究院,北京100083 [4]天津大港油田集团工程建设有限责任公司,天津300272

出　　处：《中国腐蚀与防护学报》2022年第5期779-784,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：宁波工程学院科研启动基金。

摘　　要：通过动电位极化曲线、电化学阻抗图谱、Mott-Schottky曲线和慢应变速率拉伸实验研究了pH值对X100管线钢在CO_(3)^(2-)/HCO_(3)^(-)溶液中的电化学与应力腐蚀行为的影响。结果表明,随pH值升高,X100管线钢表面膜厚度与致密性提高,点蚀电位提高;高pH-SCC敏感性降低。The effect of pH value on the electrochemical corrosion and stress corrosion of X100 pipeline steel in CO_(3)^(2-)/HCO_(3)^(-)containing solutions were studied by means of measurements of potentiodynamic polarization curve,AC impedance spectrum and Mott-Schottky curve,as well as slow strain rate tensile test.The results showed that with the increasing pH value,the thickness and compactness of the formed passive film and the pitting potential of X100 pipeline steel increase,while its SCC sensitivity reduces to certain extent.

关 键 词：X100管线钢 应力腐蚀 PH值 表面 

分 类 号：TG174[金属学及工艺—金属表面处理]