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.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
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
关键词
缓蚀剂
锌
6-硝基苯并咪唑
吸附
inhibition, zinc, 6-nitrobenzimidazole, adsorption
