| X80管线钢在NaHCO_3溶液中的阳极电化学行为 |
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| 引用本文： | 周建龙,李晓刚,杜翠薇,李云玲,李涛,潘莹.X80管线钢在NaHCO_3溶液中的阳极电化学行为[J].金属学报,2010(2). |
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| 作者姓名： | 周建龙 李晓刚 杜翠薇 李云玲 李涛 潘莹 |
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| 作者单位： | 北京科技大学腐蚀与防护中心;武汉材料保护研究所; |
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| 基金项目： | 国家科技部基础条件平台建设资助项目2005DKA10400~~ |
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| 摘 要： | 采用动电位极化曲线、动电位电化学阻抗谱(DEIS)和SEM研究了X80管线钢在NaHCO_3溶液中的阳极电化学行为,结果表明:随着HCO_3~-浓度增加,X80管线钢腐蚀速率呈现先增加、后减小的趋势,X80管线钢钝化的临界HCO_3~-浓度为0.009 mol/L.随着HCO_3~-浓度增加,极化曲线阳极电流峰发生变化,当HCO_3~-浓度低于0.009 mol/L时,无阳极电流峰;当浓度在0.009—0.05 mol/L时,有一个阳极电流峰;当浓度增加到0.1 mol/L时,出现两个明显的阳极电流峰,且第1峰与第2峰的峰值电流比随浓度的增大而逐渐增大,DEIS结果与动电位极化曲线完全对应,二者相结合可以很好地研究在不同电位下NaHCO_3溶液中X80管线钢的腐蚀行为,同时对其腐蚀产物和腐蚀机理进行了分析。
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| 关 键 词： | X80管线钢 动电位极化曲线 动电位电化学阻抗谱（DEIS） |
ANODIC ELECTROCHEMICAL BEHAVIOR OF X80 PIPELINE STEEL IN NaHCO_3 SOLUTION |
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| ZHOU Jianlong,LI Xiaogang,DU Cuiwei,LI Yunling,LI Tao Corrosion , Protection Center,University of Science , Technology Beijing,Beijing PAN Ying Wuhan Research Institute of Materials Protection,Wuhan.ANODIC ELECTROCHEMICAL BEHAVIOR OF X80 PIPELINE STEEL IN NaHCO_3 SOLUTION[J].Acta Metallurgica Sinica,2010(2). |
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| Authors: | ZHOU Jianlong LI Xiaogang DU Cuiwei LI Yunling LI Tao Corrosion Protection Center University of Science Technology Beijing Beijing PAN Ying Wuhan Research Institute of Materials Protection Wuhan |
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| Affiliation: | ZHOU Jianlong,LI Xiaogang,DU Cuiwei,LI Yunling,LI Tao Corrosion , Protection Center,University of Science , Technology Beijing,Beijing 100083 PAN Ying Wuhan Research Institute of Materials Protection,Wuhan 430030 |
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| Abstract: | X80 steel has the potential to be widely used for building the gas transmission pipelines because of its high-intensity and high-toughness.Its corrosion performance is a key problem for the life expectancy,especially in soil environment.The anodic electrochemical behavior of X80 pipeline steel in NaHCO_3 solution was studied using potentiodynamic polarization curve,dynamic electrochemical impedance spectroscopy(DEIS) as well as SEM observation.The results show that the shape of the polarization curves chang... |
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