| Ca~(2+)对X65钢腐蚀产物膜保护性能的影响 |
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| 引用本文： | 丁晨,高克玮,陈长风.Ca~(2+)对X65钢腐蚀产物膜保护性能的影响[J].腐蚀与防护,2009(10). |
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| 作者姓名： | 丁晨 高克玮 陈长风 |
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| 作者单位： | 北京科技大学材料科学与工程学院材料的表面与界面实验室; |
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| 摘 要： | 采用在腐蚀介质中添加Ca2+的方法,利用高温高压釜对X65钢进行了四组在不同Ca2+浓度下的腐蚀试验,测量了腐蚀速率。用扫描电镜(SEM)观察了腐蚀产物膜的微观形貌并统计了晶粒大小,对在不同Ca2+浓度下成膜的X65钢进行了电化学极化曲线和交流阻抗谱(EIS)分析。结果表明Ca2+可以吸附在基体表面,在成膜过程中加速了介质中反应物的反应速率,从而在阳极区形成阻碍Fe2+扩散的膜,使阳极极化、阳极电位升高,最终导致Ecorr升高,从而增加腐蚀产物膜的致密性。但Ca2+并没有使腐蚀机理发生变化。Ca2+浓度升高后,拟合电路中出现了Warburg阻抗,此时电化学反应主要受扩散控制。
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| 关 键 词： | X65管线钢 腐蚀产物膜 Ca2 浓度 交流阻抗谱(EIS) 极化曲线 |
Effect of Ca2+ Concentration on Protection Properties of X65 Steel Corrosion Scale |
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| DING Chen,GAO Ke-wei,CHEN Chang-feng.Effect of Ca2+ Concentration on Protection Properties of X65 Steel Corrosion Scale[J].Corrosion & Protection,2009(10). |
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| Authors: | DING Chen GAO Ke-wei CHEN Chang-feng |
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| Affiliation: | DING Chen,GAO Ke-wei,CHEN Chang-feng(University of Science and Technolyogy Beijing,Beijing 100083,China) |
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| Abstract: | The effect of Ca2+ on the electrochemical protection of X65 pipeline steel was studied by the way of adding Ca2+ to the simulated solution.The corrosion rate and grain size were measured and SEM was used to get the micromorphology of the corrosion scales.The electrochemical impedance spectroscopy(EIS) and polarization curves were used to investigate the corrosion scales formed in different Ca2+ concentration.The results showed that Ca2+ could adhere to the matrix and accelerate corrosion rate.The corrosion ... |
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| Keywords: | X65 pipe steel corrosion scale Ca2 concentration EIS polarization curve |
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