摘要
采用失重法、电化学极化曲线和电化学阻抗谱考察了 0 .5 mol/ L HCl溶液中苯并三唑 (BTA)、2 -巯基苯并唑 (MBO)和 2 -巯基苯并咪唑 (MBI)对铜的缓蚀作用 .挂片实验表明 ,0 .1 mmol/ L的 MBI对铜的缓蚀效率可达 91 .6% .电化学测量表明 ,MBI的加入使铜的自腐蚀电位正移至 -3 3 3 .9m V,增强了对铜电极的阳极极化过程的抑制作用 ,提高了铜电极表面的电荷转移电阻 ,从而具有较好的缓蚀效果 .采用 PPP-SCF量子化学计算法计算了缓蚀剂分子结构参数 ,MBI具有较高的最高占有轨道能量和最低空轨道能量 。
The corrosion inhibition action of benzotriazole(BTA), 2 mercapto benzoxazole(MBO) and 2 mercapto benzimidazole(MBI) for copper in 0 5 mol/L HCl solution was investigated by potentiodynamic polarization and impedance spectroscopy. Coupon tests showed that the best inhibition efficiency was 91 6% by using MBI in concentration of ca . 10 -3 mol/L. The molecular structure parameters of BTA, MBO and MBI were obtained via MM2 forcefield program and PPP SCF quantum chemical calculation, which indicated that MBI has the higher HOMO and LUMO energy, as well as larger π electron density.
出处
《应用化学》
CAS
CSCD
北大核心
2002年第6期535-538,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金 (2 98760 0 8)
上海市教委科技发展基金 (2 0 0 0 -k-0 1)资助项目
