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中国腐蚀与防护学报  2013, Vol. 33 Issue (1): 17-22    
  技术报告 本期目录 | 过刊浏览 |
铝合金微弧氧化膜在高温盐水中的 耐蚀性能研究
徐 克1, 肖书彬2 ,刘艳辉1 ,阮国岭1
1. 国家海洋局天津海水淡化与综合利用研究所 天津 300192;
2. 青岛科技大学化学与分子工程学院 青岛 266042
Corrosion Behavior of Microarc Oxidized Alumina Films in High Temperature NaCl Solution
XU Ke1, XIAO Shubin2, LIU Yanhui1, RUAN Guoling1
1. The Institute of Seawater Desalination and Multipurpose Utilization, SOA, Tianjin 300192, China;
2. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
全文: PDF(4577 KB)  
摘要: 

研究5052铝合金微弧氧化膜在70 ℃/7%NaCl溶液中浸泡不同时间的开路电位和电化学阻抗谱变化,分析微弧氧化膜层的防腐机理。研究表明,高温腐蚀溶液可快速通过微弧氧化膜缺陷渗透到基体铝合金表面,从而引发基体金属腐蚀;但腐蚀产物在膜层缺陷内的沉积可阻塞腐蚀溶液向缺陷内部渗透,又使微弧氧化膜具有一定的自修复能力,膜层电阻经过初始阶段的急剧下降后,基本保持不变;对微弧氧化膜进行封闭处理可有效提升膜层的自修复能力。

关键词 微弧氧化铝合金腐蚀电化学阻抗谱自修复    
Abstract

Abstract:The corrosion behaviors of microarc oxidized 5052 alumina immersed in 70 ℃/7% NaCl solutions with different time were studied through the open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) measurements. The results reveal that high temperature solution could permeate through microarc oxidation films and induce the corrosion of aluminum alloy substrate in the initial stage. After that, the corrosion products depositing in film defects could block the permeation of solution, which make microarc oxidation films exhibiting a self-sealing ability. And the film resistance keeps mostly unchangeable after initial rapidly decrease. Sealing treatment of microarc oxidation film could improve the self-sealing ability effectively.

Key wordsmicroarc oxidation    aluminum alloy    corrosion    EIS    self-sealing
    
ZTFLH:  TG172.5  

引用本文:

徐克,肖书彬,刘艳辉,阮国岭. 铝合金微弧氧化膜在高温盐水中的 耐蚀性能研究[J]. 中国腐蚀与防护学报, 2013, 33(1): 17-22.
XU Ke, XIAO Shubin, LIU Yanhui, RUAN Guoling. Corrosion Behavior of Microarc Oxidized Alumina Films in High Temperature NaCl Solution. Journal of Chinese Society for Corrosion and protection, 2013, 33(1): 17-22.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2013/V33/I1/17

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