Inhibition of copper corrosion in aerated hydrochloric acid solution by heterocyclic compounds containing a mercapto group
Inhibition of copper corrosion in aerated hydrochloric acid solution by heterocyclic compounds containing a mercapto group
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DOI：
10.1016/j.corsci.2004.04.012
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发表时间：
2004-12
影响因子：
8.3
通讯作者：
Daquan Zhang;Gao Lixin;Guo‐ding Zhou
中科院分区：
文献类型：
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作者：
Daquan Zhang;Gao Lixin;Guo‐ding Zhou
采用失重法、动电位极化曲线和交流阻抗法研究了苯并三唑、2-巯基苯并恶唑和2-巯基苯并咪唑在0.5moll−1HCl溶液中对铜的缓蚀作用。MBI被证明是被测试的最有效的抑制剂。动电位极化结果表明，这三种化合物都是阳极缓蚀剂，尤其是MBI对阳极电流密度有很强的抑制作用。用MM2力场程序和PPP-SCF量子化学计算得到了BTA、MBO和MBI的分子结构参数。结果表明，分子束外延材料具有较高的HOMO和LUMO能级以及较大的π电子密度。
Inhibition of copper corrosion by benzotriazole (BTA), 2-mercapto benzoxazole (MBO) and 2-mercapto benzimidazole (MBI) in 0.5 molL−1HCl was investigated by weight-loss measurements, potentiodynamic polarization curves and electrochemical impedance spectroscopy. MBI was shown to be the most effective inhibitor among those tested. Potentiodynamic polarization results revealed that the three compounds acted as anodic inhibitors, particularly MBI strongly suppressed anodic current densities. Molecular structure parameters of BTA, MBO and MBI were obtained by using an MM2 forcefield program and PPP–SCF quantum chemical calculation. It was found that MBI has higher levels of HOMO and LUMO energy and the larger π-electron density.