| 不同阳极电位下铝青铜的电化学阻抗谱研究 |
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| 引用本文： | 于辉,董飒英,徐海波,孙明先. 不同阳极电位下铝青铜的电化学阻抗谱研究[J]. 电化学, 2004, 10(1): 35-40 |
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| 作者姓名： | 于辉 董飒英 徐海波 孙明先 |
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| 作者单位： | 七二五研究所青岛分部,七二五研究所青岛分部,七二五研究所青岛分部,七二五研究所青岛分部 山东青岛266071 ,山东青岛266071 ,山东青岛266071 ,山东青岛266071 |
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| 基金项目： | “十五”重点预研 (YKO1 0 40 1 )资助 |
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| 摘 要： | 应用电化学阻抗谱(EIS)方法研究了铝青铜的腐蚀溶解机制.结果表明,在活性溶解区,铝青铜以氯化络合物的形式溶解,并且CuCl2的扩散是该溶解过程的控制步骤;而在过渡区,铝青铜的EIS谱出现第2个容抗弧,这是由于CuCl络合物和氧化腐蚀产物在电极表面沉积成膜所致;在极限电流区,腐蚀产物膜产生破损点,导致电极表面快速溶解,产生严重的点蚀,这就是在该区域极化电位下EIS出现感抗弧的原因.
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| 关 键 词： | 铝青铜 电化学阻抗谱 氯化络合物 点蚀 |
| 文章编号： | 1006-3471(2004)01-0035-06 |
| 收稿时间： | 2004-02-28 |
| 修稿时间： | 2003-03-24 |
Study on the Electrochemical Impedance Spectroscopy (EIS) of Al-Bronze at Different Anodic Potentials |
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| YU Hui,DONG Sa-ying,XU Hai-bo,SUN Ming-xian. Study on the Electrochemical Impedance Spectroscopy (EIS) of Al-Bronze at Different Anodic Potentials[J]. Electrochemistry, 2004, 10(1): 35-40 |
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| Authors: | YU Hui DONG Sa-ying XU Hai-bo SUN Ming-xian |
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| Affiliation: | YU Hui~*,DONG Sa-ying,XU Hai-bo,SUN Ming-xian |
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| Abstract: | The corrosion dissolution mechanism of Al-bronze has been investigated by Electrochemical Impedance Spectroscopy (EIS) at different anodic potentials. In the active region, the corrosion products are complex compounds of cupreous chloride and the diffusion of CuCl~(-)_2 is the control process of electrochemical reaction. In the transition region, there exhibits two capacitance loops on EIS because CuCl and cupreous oxides films deposit on the electrode surface. In the limiting current region, an inductance loop appears on the EIS because the breakdown of the oxides film leads to serious pit corrosion. |
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| Keywords: | Al-bronze Electrochemical impedance spectroscopy (EIS) Chloride complex compounds Pit corrosion |
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