| X100管线钢在水饱和酸性土壤中的电化学阻抗谱特征 |
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| 引用本文： | 李超,杜翠薇,刘智勇,李晓刚.X100管线钢在水饱和酸性土壤中的电化学阻抗谱特征[J].中国腐蚀与防护学报,2011(5). |
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| 作者姓名： | 李超 杜翠薇 刘智勇 李晓刚 |
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| 作者单位： | 钢铁研究总院青岛海洋腐蚀研究所;北京科技大学材料科学与工程学院腐蚀与防护中心; |
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| 基金项目： | 国家科技部基础条件平台建设项目(2005DKA10400); 科技部科技支撑计划项目(2006BAK0201)资助 |
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| 摘 要： | 利用电化学阻抗谱(EIS)研究X100管线钢在水饱和酸性土壤中短期的电化学腐蚀行为。结果表明,X100管线钢在鹰潭水饱和土壤中浸泡104 h后已产生点蚀。腐蚀过程的EIS谱具有两个时间常数特征,高频区为代表反应的容抗弧,低频区为代表吸附或点蚀形核期产生的感抗弧。腐蚀初期(1 h～33 h),由于水饱和土壤介质电导率较低,电极反应过程受扩散控制;腐蚀产物在电极表面积累对反应离子扩散有阻碍作用,使阻抗增大;腐蚀产物膜疏松多孔,形成局部活化区域,使阻抗减小;Cl~-对腐蚀产物膜有破坏作用且在膜内局部地区浓缩,诱发点蚀,使阻抗减小,出现感抗特征。
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| 关 键 词： | X100管线钢 电化学阻抗谱 水饱和酸性土壤 |
CHARACTERISTICS OF ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY FOR X100 PIPELINE STEEL IN WATER-SATURATED ACIDIC SOIL |
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| LI Chao,DU Cuiwei,LIU Zhiyong,LI Xiaogang .Qingdao Research Institute for Marine Corrosion,Central Institute for Iron , Steel,Qingdao ,.Corrosion , Protection Center,School of Materials Science , Engineering,University of Science , Technology Beijing,Beijing.CHARACTERISTICS OF ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY FOR X100 PIPELINE STEEL IN WATER-SATURATED ACIDIC SOIL[J].Journal of Chinese Society For Corrosion and Protection,2011(5). |
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| Authors: | LI Chao DU Cuiwei LIU Zhiyong LI Xiaogang Qingdao Research Institute for Marine Corrosion Central Institute for Iron Steel Qingdao Corrosion Protection Center School of Materials Science Engineering University of Science Technology Beijing Beijing |
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| Affiliation: | LI Chao~(1,2),DU Cuiwei~2,LIU Zhiyong~2,LI Xiaogang~2 1.Qingdao Research Institute for Marine Corrosion,Central Institute for Iron and Steel,Qingdao 266071,2.Corrosion and Protection Center,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083 |
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| Abstract: | The electrochemical impedance spectroscopy(EIS) of X100 steel in water-saturated acidic soil was studied.The results show that pitting corrosion occured after soak in Yingtan saturated soil water for 104 hours,and the Nyquist diagram had two time constants,a capacitive loop at high frequency represented the reaction,and an inductive loop at the low frequency for representing adsorption or the pitting nucleation period of the inductance.Diffusion control results in the increasing of impedance because of low ... |
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| Keywords: | X100 pipeline steel EIS water- saturated acid soil |
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