| X80管线钢在0．5mol／L NaHCO3＋0．02mol／L NaCl溶液中的点腐蚀性能 |
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| 引用本文： | 梁平,李晓刚,杜翠薇,陈旭.X80管线钢在0．5mol／L NaHCO3＋0．02mol／L NaCl溶液中的点腐蚀性能[J].腐蚀与防护,2008,29(11):657-660. |
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| 作者姓名： | 梁平 李晓刚 杜翠薇 陈旭 |
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| 作者单位： | 北京科技大学材料科学与工程学院;辽宁石油化工大学机械工程学院; |
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| 基金项目： | 国家科技基础条件平台建设项目，国家科技支撑计划课题 |
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| 摘 要： | 采用动电位极化和电化学阻抗法研究了X80和X70管线钢在0.5 mol/L NaHCO3 0.02 mol/L NaCl溶液中的腐蚀行为,并通过电容测量方法对其腐蚀机理进行了探讨.结果表明:在0.5 mol/L NaHCO3 0.02 mol/L NaCl溶液中,X80管线钢的点腐蚀电位Epit比X70钢的要正一些,发生点腐蚀的倾向性更小.Mott-Sehottky分析表明:X80比X70管线钢表面钝化膜内的施主密度更低,缺陷数量更少,从而减少了点腐蚀萌生的潜在位置,使X80钢比X70钢具有更好的耐点蚀性能.
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| 关 键 词： | X80管线钢 点蚀 莫特一肖特基分析 |
Pitting Corrosion of X80 Pipeline Steel in 0.5 mol/L NaHCO_3+0.02 mol/L NaCl Solution |
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| LIANG Ping LI Xiao-gang DU Cui-wei CHEN Xu.Pitting Corrosion of X80 Pipeline Steel in 0.5 mol/L NaHCO_3+0.02 mol/L NaCl Solution[J].Corrosion & Protection,2008,29(11):657-660. |
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| Authors: | LIANG Ping LI Xiao-gang DU Cui-wei CHEN Xu |
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| Affiliation: | LIANG Ping~(1,2) LI Xiao-gang~1 DU Cui-wei~1 CHEN Xu~1 (1.University of Science , Technology Beijing,Beijing 100083,China,2.Liaoning Shihua University,Fushun 113001,China) |
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| Abstract: | The corrosion behavior of X80 and X70 pipeline steels in 0.5 mol/L NaHCO_3+0.02 mol/L NaCl solution was studied by potentiodynamic polarization technique and EIS,and the corrosion mechanism was investigated by capacitance measurements.It was shown that the potential of pitting corrosion for X80 pipeline steel was more noble than that of X70 steel,and the pitting probability was lower for X80 steel.Mott-Schottky results indicated that the value of donor density for passive film formed on X80 steel was less t... |
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| Keywords: | XS0 pipeline steel pitting corrosion Mott-Schottky analysis |
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