铝合金海水介质中腐蚀行为研究

摘要

利用动电位极化扫描和交流阻抗测试电化学试验方法,研究了铝合金在不同海水条件下的腐蚀行为.提高海水pH值、降低海水温度、海水盐度及海水溶解氧浓度,均使其腐蚀电流密度减小,电荷转移电阻与铝合金表面钝化膜电阻增加.在80 ℃、溶解氧浓度0.01 mg·L^-1的条件下,铝合金的腐蚀深度为0.0226 mm·a^-1.试验结果为铝合金材料用于低温多效海水淡化装置提供了技术依据.

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	解利昕
	谢呈香
	王世昌

关键词：铝合金；海水；耐腐蚀性；电化学

Abstract：

The corrosion behavior of aluminum alloy in seawater was studied using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. It was found that the corrosion current density decreased, charge transfer resistance and resistance of passivation film increased with the increase of pH and the decreases of the temperature, the salinity and the dissolved oxygen. The corrosion depth of the aluminum alloy was as low as 0.0226 mm·a^-1 at the condition of 80 ℃ and 0.01 mg·L^-1 of dissolved oxygen. Under certain operating circumstances, the aluminum alloy can be applied in the low-temperature desalination units.

Keywords： aluminum alloy； seawater； corrosion resistance； electrochemistry

Received 2013-05-09;

Corresponding Authors: 解利昕,E-mail: xie_lixin@tju.edu.cn. Email: xie_lixin@tju.edu.cn

About author: 解利昕(1964-),男,研究员,研究方向为海水淡化技术及相关领域.

引用本文:

解利昕, 谢呈香, 王世昌.铝合金海水介质中腐蚀行为研究[J]. 化学工业与工程, 2015,32(6): 47-51

Xie Lixin, Xie Chengxiang, Wang Shichang.Corrosion Behavior of Aluminum Alloy in Seawater[J]. Chemcial Industry and Engineering, 2015,32(6): 47-51

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