短期贮存对金属铜腐蚀电化学行为的影响

doi:10.11902/1005.4537.2015.162

中国腐蚀与防护学报

2016, Vol. 36

Issue (4): 375-380 DOI: 10.11902/1005.4537.2015.162

研究报告

本期目录 | 过刊浏览

短期贮存对金属铜腐蚀电化学行为的影响

冯林,王燕华(

),钟莲,王佳,李爱娇,金晓晓

中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室青岛 266100

Influence of Short-term Storage on Corrosion Behavior of Copper

Lin FENG,Yanhua WANG(

),Lian ZHONG,Jia WANG,Aijiao LI,Xiaoxiao JIN

Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China

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摘要:

采用动电位极化 (PDS)、电化学阻抗谱 (EIS)、电容测量以及阵列电极等技术研究了Cu的短期贮存对其腐蚀电化学行为的影响。结果表明,金属Cu表面膜呈现p型半导体结构,经过短期贮存后载流子浓度减小,腐蚀电位正移,腐蚀电流密度下降,表面膜对腐蚀阴极过程、阳极过程均有抑制作用。Cu在NaCl液滴下呈现典型的局部腐蚀特征;经过贮存后,电极表面润湿性减弱,腐蚀活性降低,总体平均腐蚀强度减弱,但是局部腐蚀强度反而增强。

关键词 ：阵列电极, 短期贮存, Cu, Mott-Schottky曲线, 液滴, 腐蚀

Abstract：

The influence of short-term storage in dry atmosphere on the corrosion behavior of copper was investigated by means of potentiodynamic polarization, electrochemical impedance spectroscopy, capacitance measurement and array electrode technique. It was found that the surface film on copper presented a p-type semiconductor structure, and the carrier concentration decreased after short-term storage. At the same time, the corrosion potential increased, the corrosion current density decreased, and the surface film inhibited both the cathodic and anodic process. Copper displayed the typical characteristics of localized corrosion beneath a NaCl droplet. After storage, the wet-ability, the corrosion activity as well as the overall average corrosion intensity are reduced, but the local corrosion intensity enhanced.

Key words： array electrode short-term storage copper mott-schottky plot droplet corrosion

基金资助:国家自然科学基金项目 (51131005和40906039) 及山东省优秀中青年科学家奖励基金项目 (BS2012HZ021) 资助

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引用本文:

冯林,王燕华,钟莲,王佳,李爱娇,金晓晓. 短期贮存对金属铜腐蚀电化学行为的影响[J]. 中国腐蚀与防护学报, 2016, 36(4): 375-380.
Lin FENG, Yanhua WANG, Lian ZHONG, Jia WANG, Aijiao LI, Xiaoxiao JIN. Influence of Short-term Storage on Corrosion Behavior of Copper. Journal of Chinese Society for Corrosion and protection, 2016, 36(4): 375-380.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.162 或 https://www.jcscp.org/CN/Y2016/V36/I4/375

图1 试样贮存前后在0.05 mol/L Na2SO4溶液中的电容-电压曲线

表1 试样贮存前后在0.05 mol/L Na2SO4溶液中的电化学参数

图2 试样贮存前后在0.6 mol/L NaCl溶液中的PDS和EIS谱

图3 新处理电极和贮存30 d后电极在25 μL 0.6 mol/L NaCl液滴下电极表面电流分布图

图4 新处理电极和贮存后电极的平均电流iAverage,平均阳极电流密度IAverage,最大阳极电流密度Ia,max和局部腐蚀强度指数LCII随腐蚀时间的变化

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