铝合金海水介质中腐蚀行为研究  

Corrosion Behavior of Aluminum Alloy in Seawater

作　　者：解利昕[1] 谢呈香 王世昌[1] 

机构地区：[1]天津大学化工学院化学工程联合国家重点实验室天津市膜科学与海水淡化技术重点实验室,天津300072

出　　处：《化学工业与工程》2015年第6期47-51,共5页Chemical Industry and Engineering

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p H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。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 p H 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- 1at the condition of 80 ℃ and 0. 01 mg·L- 1of dissolved oxygen. Under certain operating circumstances,the aluminum alloy can be applied in the low-temperature desalination units.

关 键 词：铝合金 海水 耐腐蚀性 电化学 

分 类 号：P755.3[天文地球—海洋科学] P747