| 不同组织X80钢在高pH土壤模拟溶液中的点蚀电化学行为 |
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| 引用本文： | 黄峰,曲炎淼,邓照军,刘静,郑超超,李晓刚.不同组织X80钢在高pH土壤模拟溶液中的点蚀电化学行为[J].中国腐蚀与防护学报,2010(1). |
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| 作者姓名： | 黄峰 曲炎淼 邓照军 刘静 郑超超 李晓刚 |
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| 作者单位： | 武汉科技大学材料与冶金学院;北京科技大学腐蚀与防护中心;武钢集团钢铁研究院; |
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| 基金项目： | 国家自然科学基金项目(50871077); 中国博士后科学基金项目(20090450293)资助 |
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| 摘 要： | 将水淬、空冷方式热处理的X80钢与供货状态(原始组织)X80钢相比较,用动电位极化曲线和动电位交流阻抗谱研究不同组织X80钢在0.5 mol/L Na_2CO_3+1 mol/L NaHCO_3高pH值土壤模拟溶液中的点蚀电化学行为。结果表明,水淬热处理后的X80钢更易钝化,点蚀敏感性低,但维钝电流较其他两种组织的都大;三种组织的X80钢极化电阻和电极表面状态常数n值随电位的变化规律基本一致,但水淬组织的n值在不同电位区间分别高于或低于其他两种组织;这些电化学行为的差异与不同组织试样表面钝化膜的非均匀性和致密程度有关;动电位极化法和动电位电化学阻抗谱法所得结论一致,腐蚀电流密度随电位的变化及电极极化电阻随电位变化都可用来反映电极的点蚀行为。
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| 关 键 词： | X80钢 热处理 点蚀 动电位极化 动电位交流阻抗 |
PITTING ELECTROCHEMICAL BEHAVIORS OF DIFFERENT MICROSTRUCTURE X80 STEEL IN HIGH pH SOIL SIMULATIVE SOLUTION |
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| HUANG Feng,QU Yanmiao,DENG Zhaojun,LIU Jing,ZHENG Chaochao,LI Xiaogang.PITTING ELECTROCHEMICAL BEHAVIORS OF DIFFERENT MICROSTRUCTURE X80 STEEL IN HIGH pH SOIL SIMULATIVE SOLUTION[J].Journal of Chinese Society For Corrosion and Protection,2010(1). |
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| Authors: | HUANG Feng QU Yanmiao DENG Zhaojun LIU Jing ZHENG Chaochao LI Xiaogang |
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| Affiliation: | HUANG Feng~(1,2),QU Yanmiao~1,DENG Zhaojun~(1,3),LIU Jing~1,ZHENG Chaochao~1,LI Xiaogang~2 (1.College of Materials Science , Metallurgical Engineering,Wuhan University of Science , Technology,Wuhan 430081,2.Corrosion , Protection Center,University of Science , Technology Beijing,Beijing 100083,3.Wu Gang Corp.Iron , Steel Research Institute,Wuhan 430080) |
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| Abstract: | The different microstructure of X80 steel was obtained by heat treatment,water quenching and air cooling.The pitting electrochemical behavior of X80 pipeline steel with three different microstructure in 0.5 mol/L Na_2CO_3+1 mol/L NaHCO_3 high pH soil simulative solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy.The results indicated that the corrosion inhibition of X80 steel after heat treatment became worse compared with original microstructure,but passivat... |
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| Keywords: | X80 steel heattreament pitting corrosion potentiodynamic polarization potentiodynamic electrochemical impedance |
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