| 铜在0.5 mol/L NaCl溶液中的缝隙腐蚀现象探讨 |
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| 引用本文： | 卢琳,李晓刚,杜翠薇,董超芳,高谨.铜在0.5 mol/L NaCl溶液中的缝隙腐蚀现象探讨[J].装备环境工程,2007,4(3):31-34. |
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| 作者姓名： | 卢琳 李晓刚 杜翠薇 董超芳 高谨 |
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| 作者单位： | 北京科技大学,腐蚀与防护中心,北京,100083 |
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| 摘 要： | 采用电化学测量技术和原子力显微镜(AFM)研究室温含氧或无氧0.5 mol/L NaCl水溶液中铜的缝隙腐蚀现象.结果表明,铜发生缝隙腐蚀的过程中,金属腐蚀电位朝负移动,至一最低值并保持不变.同时,观察到铜缝隙腐蚀形态与通常的不锈钢缝隙腐蚀现象不同,即缝外腐蚀严重,缝内腐蚀相对较轻或几乎没有.发生这种现象主要是由于形成了金属离子浓差电池引起的.
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| 关 键 词： | 缝隙腐蚀 原子力显微镜 表面形貌 腐蚀电位 NaCl 水溶液 腐蚀现象 Phenomenon Crevice Corrosion Copper Approach 浓差电池 金属离子 内腐蚀 严重 外腐蚀 不锈钢 腐蚀形态 移动 腐蚀电位 过程 缝隙腐蚀 发生 结果 |
| 文章编号： | 1672-9242（2007）03-0031-04 |
| 修稿时间： | 2007-04-26 |
Approach to Copper Crevice Corrosion Phenomenon in 0.5 mol/L NaCl Solution |
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| LU Lin,LI Xiao-gang,DU Cui-wei,DONG Chao-fang,GAO Jin.Approach to Copper Crevice Corrosion Phenomenon in 0.5 mol/L NaCl Solution[J].Equipment Environmental Engineering,2007,4(3):31-34. |
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| Authors: | LU Lin LI Xiao-gang DU Cui-wei DONG Chao-fang GAO Jin |
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| Institution: | University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | With the aid of electrochemical measurements and atomic force microscopy(AFM),Copper crevice corrosion was studied in 0.5 M NaCl solution open to the air at room temperature or in the deoxygenated solution.Results showed that corrosion potential moved negatively till the lowest value was reached and kept stable during the procedure of copper crevice corrosion.Moreover,the characteristics of copper crevice corrosion were distinct from that of common crevice corrosion observed in other passive metals.That is,it attacked bold surface and the corrosion-free surface in the crevice were observed in copper crevice corrosion,which might be attributed to metal differential concentration cell. |
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| Keywords: | crevice corrosion atomic force microscopy surface morphology corrosion potential |
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