| 纯Al表面局部孔蚀的电化学噪声特征分析 |
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| 引用本文： | 刘士强,王立达,宗秋凤,张成,刘贵昌.纯Al表面局部孔蚀的电化学噪声特征分析[J].中国腐蚀与防护学报,2014,34(2):160-164. |
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| 作者姓名： | 刘士强 王立达 宗秋凤 张成 刘贵昌 |
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| 作者单位： | 大连理工大学化工学院 大连 116023 |
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| 基金项目： | 海洋重大专项子课题项目 (201005028-3) 和中央高校基本科研业务费专项资金项目 (1000-852012) 资助 |
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| 摘 要： | 电化学噪声时域谱可以预测局部腐蚀的发生，定性地说明腐蚀发生的类型；电流标准偏差σI，噪声电阻Rn和电流白噪声水平W能表征腐蚀发展的剧烈程度，当腐蚀发生时，σI和W趋于增大，Rn趋于减小。
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| 关 键 词： | 电化学噪声 纯Al 局部腐蚀 时域分析 频域分析 |
| 收稿时间： | 2013-04-27 |
Electrochemical Noise Analysis of Local Pitting Corrosion Behavior of Pure Aluminum |
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| LIU Shiqiang,WANG Lida,ZONG Qiufeng,ZHANG Cheng,LIU Guichang.Electrochemical Noise Analysis of Local Pitting Corrosion Behavior of Pure Aluminum[J].Journal of Chinese Society For Corrosion and Protection,2014,34(2):160-164. |
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| Authors: | LIU Shiqiang WANG Lida ZONG Qiufeng ZHANG Cheng LIU Guichang |
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| Affiliation: | School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China |
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| Abstract: | The local pitting corrosion behavior of the pure aluminum in 3.5%NaCl solution was characterized by electrochemical noise analysis technique. The corrosion processes for aluminum were studied in detail by analyzing time-domain and frequency-domain characteristics of electrochemical noise together with morphology features. The results show that the time-domain spectroscopy of the electrochemical noise can be used to predict the occurrence of local corrosion and qualitatively distinguish the type of corrosion. It was found that the current standard deviation σI, noise resistance Rn and current white noise levels W can reflect the corrosion intensity. When the corrosion occurs, σI and W tend to increase, but Rn tends to decrease. |
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| Keywords: | electrochemical noise pure aluminum local corrosion time-domain analysis frequency-domain analysis |
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