溶解氧对X70管线钢在高pH值溶液中的电化学行为和SCC敏感性的影响
Influence of Dissolved Oxygen on Electrochemical Behaviour and SCC Susceptibility of Pipeline Steel X70 in High pH Solution
摘 要
采用动电位极化、恒电位极化曲线测试法研究了X70管线钢在0.5 mol/L Na2CO3+1 mol/L NaHCO3溶液中的电化学行为,分析了供氧状况和扫描速度等因素对极化曲线的影响.采用慢应变速率试验(SSRT)研究了X70管线钢在不同供氧状况的溶液中的应力腐蚀破裂(SCC)敏感性.结果表明,X70管线钢在通高纯氮气和不通气溶液中的动电位极化曲线形状相似,但是在通压缩空气的溶液中的动电位极化曲线出现三个零电流电位,分别位于活化区、活化-钝化过渡区和钝化区:不同供氧状况下SCC敏感电位范围不同.
溶解氧
高pH值溶液
电化学行为
SCC敏感性
pipeline steel
high-pH solution
electrochemical behavior
SCC susceptibility
Abstract
The influence of oxygen concentration on the electrochemical behavior and stress corrosion cracking(SCC) susceptibility of pipeline steel X70 in 0.5 mol/L Na2CO3+1 mol/L NaHCO3 solution was investigated using potentiodynamic polarization,potentiostatic polarization and slow strain rate testing(SSRT).The influence of oxygen concentration and scan rate on the potentiodynamic polarization curves is analyzed.The potentiodynamic polarization curves in the solution deaerated by high purity nitrogen are similar to those in the sealed non-aerated solution.There are three zero current potentials in the potentiodynamic polarization curve in the solution aerated by compressed air.The potential range of SCC susceptibility differs from each other in the different oxygen concentration solutions.
中图分类号 TG172.9
所属栏目 试验研究
基金项目 国家重点基础研究专项经费(G19990650),上海市科技发展基金项目(025258036),上海市自然科学基金(02ZE14031)资助.
收稿日期 2007/11/2
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: LIU Xing,ZHOU Jian-jiang,LI Guang-fu,YANG Wu. Influence of Dissolved Oxygen on Electrochemical Behaviour and SCC Susceptibility of Pipeline Steel X70 in High pH Solution[J]. Corrosion & Protection, 2008, 29(6): 305～308
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】Kentish P J.Gas pipeline failures;Australian experience[J].Br Corros J,1985,20(3);139-146.
【2】National Energy Board (NEB).Public inquiry concerning stress corrosion cracking on Canadian oil and gas pipelines[C]//NEB Report Mh-2-95,Calgary,AB,Canada;1996.
【3】左景伊.应力腐蚀破裂[M].西安;西安交通大学出版社,1985;13-23.
【4】闫茂成,翁永基.环境溶液对管道钢应力腐蚀过程电化学行为的影响[J].中国腐蚀与防护学报,2005,25(1);34-38.
【5】Charles E A,Parkins R N.Generation of stress corrosion cracking environments at pipeline surface [J].Corrosion,1995,51(7);518-527.
【6】化学工业部化工机械研究院.腐蚀与防护手册-腐蚀理论·试验及监测[M].北京;化学工业出版社,1997;30-35.
【7】Parkins R N.Predictive approaches to stress corrosion cracking failure[J].Corrosion Science,1980,20(5);151-157.
【8】Sutcliffe J M,Fessler R R,Boyd W K,et al.Stress corrosion cracking of carbon steel in carbonate solutions[J].Corrosion,1972,28(8);313-320.
【2】National Energy Board (NEB).Public inquiry concerning stress corrosion cracking on Canadian oil and gas pipelines[C]//NEB Report Mh-2-95,Calgary,AB,Canada;1996.
【3】左景伊.应力腐蚀破裂[M].西安;西安交通大学出版社,1985;13-23.
【4】闫茂成,翁永基.环境溶液对管道钢应力腐蚀过程电化学行为的影响[J].中国腐蚀与防护学报,2005,25(1);34-38.
【5】Charles E A,Parkins R N.Generation of stress corrosion cracking environments at pipeline surface [J].Corrosion,1995,51(7);518-527.
【6】化学工业部化工机械研究院.腐蚀与防护手册-腐蚀理论·试验及监测[M].北京;化学工业出版社,1997;30-35.
【7】Parkins R N.Predictive approaches to stress corrosion cracking failure[J].Corrosion Science,1980,20(5);151-157.
【8】Sutcliffe J M,Fessler R R,Boyd W K,et al.Stress corrosion cracking of carbon steel in carbonate solutions[J].Corrosion,1972,28(8);313-320.
相关信息
