| Cu-60Fe-12Cr合金在含Cl~-介质中的电化学腐蚀行为 |
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| 引用本文： | 薛荣,曹中秋,郑志国.Cu-60Fe-12Cr合金在含Cl~-介质中的电化学腐蚀行为[J].沈阳师范大学学报(自然科学版),2005(1). |
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| 作者姓名： | 薛荣 曹中秋 郑志国 |
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| 作者单位： | 沈阳师范大学化学与生命科学学院，沈阳师范大学化学与生命科学学院，沈阳师范大学化学与生命科学学院 辽宁沈阳 110034，辽宁沈阳 110034，辽宁沈阳 110034 |
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| 摘 要： | 利用动电位扫描法,结合电化学交流阻抗技术研究了用粉末冶金(PM)技术制备的Cu 60Fe 12Cr合金在含Cl-腐蚀介质中的电化学腐蚀行为.结果表明:合金在单一Na2SO4介质中具有较低的腐蚀电流,腐蚀速度较慢,而在含Cl-腐蚀介质中,自腐蚀电位不同程度负移,膜电阻减小,腐蚀速度加快;合金在含Cl-介质中腐蚀电化学阻抗谱在呈单容抗弧特征,没有出现Warburg阻抗的性质,腐蚀过程由电化学反应控制;加入Cl-后,极化电阻减小;腐蚀过程中存在一定弥散效应.
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| 关 键 词： | Cu60Fe12Cr合金 极化曲线 交流阻抗 腐蚀 |
Electrochemical corrosion behavior of Cu-60Fe-12Cr alloy in Cl~- medium |
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| XUE Rong,CAO Zhong-qiu,ZHENG Zhi-guo.Electrochemical corrosion behavior of Cu-60Fe-12Cr alloy in Cl~- medium[J].Journal of Shenyang Normal University: Nat Sci Ed,2005(1). |
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| Authors: | XUE Rong CAO Zhong-qiu ZHENG Zhi-guo |
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| Abstract: | The corrosion behavior of Cu-60Fe-12Cr alloy prepared by powder metallurgy (PM) in solution with different Cl~- content was studied by potentiodynamic polarization method with Electrochemical Impedance Spectroscopy(EIS).The results show that Cu-60Fe-12Cr alloy has lower corrosion current and slower corrosion rate in single Na_2SO_4 solution while with the increase of Cl~- content,corrosion potential moved toward negative direction in different degrees,the resistance of surface decreased and corrosion rate increased.After included Cl~- the Nyquist plots for the corrosion of Cu-60Fe-12Cr alloy were composed of single capacitance loops and the process of corrosion was controlled by electrochemical reaction without Warburg impedance.By adding Cl~- ions,resistance of polarization decreased and disperse effect occurred in corrosion process. |
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| Keywords: | Cu-60Fe-12Cr alloy polarization curve EIS corrosion |
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