详细信息
HCl溶液中巯基杂环化合物对铜的缓蚀作用
Corrosion Inhibition of Heterocyclic Compounds Containing Mercapto Group for Copper in HCl Solution
文献类型:期刊文献
中文题名:HCl溶液中巯基杂环化合物对铜的缓蚀作用
英文题名:Corrosion Inhibition of Heterocyclic Compounds Containing Mercapto Group for Copper in HCl Solution
作者:张大全[1];高立新[1];周国定[1];龚琼[1];陆柱[2]
机构:[1]上海电力学院国家电力公司热力设备腐蚀与防护重点实验室,上海200090;[2]华东理工大学防腐蚀中心
年份:2002
卷号:19
期号:6
起止页码:535
中文期刊名:应用化学
外文期刊名:Chinese Journal of Applied Chemistry
收录:CSTPCD;;北大核心:【北大核心2000】;CSCD:【CSCD2011_2012】;
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
语种:中文
中文关键词:HCl溶液;巯基杂环化合物;缓蚀作用;铜缓蚀剂;极化曲线;电化学阻抗;PPP-SCF计算
外文关键词:corrosion inhibition,mercaptobenzoxazole,mercaptobenzimidazole,potentiodynamic polarization ,impedance,PPP SCF calculation
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.
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