| Cl~-对690合金腐蚀电化学行为的影响 |
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| 引用本文： | 李成涛,程学群,董超芳,李晓刚.Cl~-对690合金腐蚀电化学行为的影响[J].北京科技大学学报,2011,33(4):444-448. |
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| 作者姓名： | 李成涛 程学群 董超芳 李晓刚 |
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| 作者单位： | 北京科技大学新材料技术研究院;北京科技大学腐蚀与防护教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(No.50871020); 国家科技基础条件平台建设项目(2005DKA10400) |
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| 摘 要： | 采用动电位极化、电化学阻抗、动电位电化学阻抗谱和电容测量等方法研究了690合金在一回路模拟溶液中的电化学行为.极化曲线结果表明:690合金在两种溶液中都存在较窄的钝化区间,在0.5V出现二次钝化现象.电化学阻抗表明,690合金在不含Cl-溶液中的阻抗模值较大,而随Cl-的加入阻抗模值变小.动电位电化学阻抗谱表明,随扫描电位正移,钝化膜在两种溶液中具有相似的变化趋势,动电位电化学阻抗谱与动电位极化曲线完全对应.690合金在0.2V下形成的钝化膜的Mott-Schottky曲线测量表明,溶液中Cl-使得钝化膜中的施主和受主密度增大.
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| 关 键 词： | 镍基合金 腐蚀 钝化膜 电化学性能 电化学阻抗 |
Influence of Cl- on the corrosion electrochemical behavior of Alloy 690 |
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| LI Cheng-tao,CHENG Xue-qun,DONG Chao-fang,LI Xiao-gang.Influence of Cl- on the corrosion electrochemical behavior of Alloy 690[J].Journal of University of Science and Technology Beijing,2011,33(4):444-448. |
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| Authors: | LI Cheng-tao CHENG Xue-qun DONG Chao-fang LI Xiao-gang |
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| Institution: | LI Cheng-tao1,2),CHENG Xue-qun1,DONG Chao-fang1,LI Xiao-gang1,2) 1) Advanced Material & Technology Institute,University of Science and Technology Beijing,Beijing 100083,China 2) Key Laboratory of the Ministry of Education of China for Corrosion and Protection,China |
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| Abstract: | The electrochemical behavior of Alloy 690 in primary circuit simulated solutions was investigated by potentiodynamic polarization,electrochemical impedance spectroscopy(EIS),dynamic electrochemical impedance spectroscopy(DEIS) and capacitance measurements.It is shown that Alloy 690 has a narrow passive anodic region in the test solutions.But the second passive phenomenon is found at the 0.5 V potential.EIS results indicate that the impedance value of the passive film in the solution without Cl-anions is hig... |
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| Keywords: | nickel base alloys corrosion passive films electrochemical properties electrochemical impedance spectroscopy |
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