| 用电化学阻抗技术研究阴极保护 |
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| 引用本文： | 徐乃欣 张承典. 用电化学阻抗技术研究阴极保护[J]. 腐蚀与防护, 1997, 18(2): 55-59 |
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| 作者姓名： | 徐乃欣 张承典 |
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| 作者单位： | 中国科学院上海冶金研究所 200050(徐乃欣)，中国科学院上海冶金研究所 200050(张承典) |
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| 摘 要： | 介绍电化学阻抗谱（ＥＩＳ）在研究阴极保护方面的应用，根据受有极保护金属的阻抗特征，可以确定实际保护率达到极大的最佳阴极保护保护电位，ＥＩＳ可以用于监测土壤和混凝土钢结构受阴极保护时的腐蚀情况，海水中阴极保护时形成的钙质沉积层的保护性能可由ＥＩＳ的参数来反映。ＥＩＳ变化趋势可还以反映Ａｌ－Ｚｎ－Ｉｎ合金牺牲阳极沿晶界的择优溶解。
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| 关 键 词： | 电化学 阻抗 阴极保护 电化学保护 防腐 |
APPLICATIONS OF ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY TO CATHODIC PROTECTION STUDY |
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| XU Naixin and ZHANG Cbengdian. APPLICATIONS OF ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY TO CATHODIC PROTECTION STUDY[J]. Corrosion & Protection, 1997, 18(2): 55-59 |
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| Authors: | XU Naixin and ZHANG Cbengdian |
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| Abstract: | The applications of Electrochemical Impedance Spectroscopy (EIS) to cathodic protection (CP) were reviewed. Based on the impedance characteristics of metals under CP,the optimum protection potential, at which a rational protection efficiency showed a maximum, could be determined. The feasibility was established for using EIS as a monitoring tool for detecting corrosion on cathodically protected steel structures in soil and concrete. The significance of the impedance parameters reflecting the effectiveness of calcareous deposit, formed on metal surface under CP in seawater was emphasized. The changing trend in impedance spectra reflected the preferential dissolution of Al-Zn-In alloy sacrificial anode along the grain boundaries. |
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| Keywords: | EIS Cathodic potection |
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