铜经BTA和MBT钝化处理后在NaCl溶液中电化学行为分析

摘要

The efficiency of benzotriazole(BTA) and 2-mercaptobenzothiazole(MBT) as corrosion inhibitors for copper was investigated in 3.5% NaCl solution. Potentiodynamic polarization and cyclic voltammogram and AC impedance spectroscopy were applied to study the electrochemical behavior of copper electrodes passivated by inhibitors and their complex. The results is shown that the two compounds suppress both anodic and cathodic corrosion reactions and the film resistance increases in the electrochemical studies. A synergistic effect of BTA and MBT combined inhibitors on copper is observed. SEM images are used to show the synergistic effect directly.%采用电化学极化曲线、循环伏安曲线和电化学阻抗谱研究铜经苯并三氮唑(BTA)和2-巯基苯并噻唑(MBT)钝化处理后在3.5％NaCl溶液中的电化学行为.两者复配使用增强对铜电极的阳极和阴极电化学过程的抑制作用,增大了膜电阻,从而具有较好的缓蚀协同效应.并通过扫描电镜观察,直观地表征出BTA和MBT的复配增强对铜腐蚀的抑制作用.