6-硝基苯并咪唑在KOH溶液中对锌的缓蚀性能  

CORROSION INHIBITION OF 6-NITROBENZIMIDAZOLE IN KOH SOLUTION FOR ZINC

作　　者：胡莲跃[1] 张胜涛[1] 黄小红[1] 吴永英[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《中国腐蚀与防护学报》2012年第3期267-272,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：重庆市科委重点项目(CSTC 2008BA4020)资助

摘　　要：采用失重法、电化学测试以及量子化学计算方法研究6-硝基苯并咪唑在KOH(0.1 mol/L)溶液中对Zn的缓蚀性能。结果表明,6-硝基苯并咪唑能有效抑制锌的阳极氧化,从而抑制Zn在碱液中的自腐蚀,属于阳极型缓蚀剂;当6-硝基苯并咪唑浓度为5 mmol/L时缓蚀效果最佳,其效率达到96.8%;6-硝基苯并咪唑在锌表面的吸附符合Langmuir等温式。The effect of 6-nitrobenzimidazole on the zinc corrosion in 0.1 mol/L KOH solution has been studied by electrochemical, weight loss measurements and quantum chemical calculations. It has been shown that 6-nitrobenzimidazole act as an anodic inhibitor, can effectively restrain the process of the anodic oxidation of zinc. The highest value of inhibition efficiency is 96.8% at 5 mmol/L concentration. Thermodynamic calculation suggests that the adsorption of 6-nitrobenzimidazole follows Langmuir adsorption isotherm.

关 键 词：缓蚀剂 锌 6-硝基苯并咪唑 吸附 

分 类 号：O64[理学—物理化学]