采用电化学阻抗谱(EIS)技术研究了环氧防锈漆经实海浸泡试验和质量分数3.5％ NaCl溶液浸泡试验、盐雾试验2种实验室模拟试验后的电化学行为,测量了涂层试样在3种腐蚀环境中0.01 Hz低频阻抗(|Z|0.01Hz),探究了实海浸泡试验和两种实验室模拟试验的相关性.结果表明:|Z|0.01Hz在3种试验环境中的变化趋势相同,实海浸泡试验和2种实验室模拟试验的试验结果具有很好的相关性;3种试验环境对涂层破坏作用由小到大依次为:3.5％ NaCl溶液浸泡试验＜实海浸泡试验＜盐雾试验.
Electrochemical behaviors of an epoxy coating in real sea immersion test,3.5％ (mass) NaCl solution immersion test and salt spray test were studied by electrochemical impedance spectroscopy (EIS).Coating impedance in low frequency of 0.01 Hz (|Z|0.01 Hz) were tested in the 3 kinds of corrosion environments,and the relationships between real sea immersion test and 2 types of laboratory experiments were also analyzed.The results indicated that the trends of | Z | 0.01 Hz in 3 kinds of corrosion environments were similar.The results from real sea immersion test and 2 types of laboratory experiments were correlated well,and the order of the damaging effect of the three corrosive environments on coating was as follows:3.5 ％00 NaCl solution ＜ seawater immersion experiment ＜ salt spray.
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