摘要
合成了2-(烯丙硫基)苯并咪唑(ABMI)和2-(丁硫基)苯并咪唑(BBMI),采用失重法和电化学极化曲线法考察了它们在1 MHCl中对Q235钢的缓蚀作用。研究结果表明:在25℃,1 MHCl溶液中,二者浓度均为100 mg/L时,其缓蚀率分别达到95.20%和87.32%;ABMI为混合型缓蚀剂,而BBMI为抑制阳极反应为主的混合型缓蚀剂;缓蚀性均随着温度升高而降低,在同一温度时AB-MI的缓蚀性能优于BBMI。两种缓蚀剂在Q235钢表面吸附均符合Langmuir吸附等温式,属于自发进行的化学吸附。
2-（Allylthio）-1H-benzoimidazole（ABMI） and 2-（butylthio）-1H-benzoimidazole（BBMI） have been synthesized.Their corrosion inhibition has been investigated towards the corrosion of Q235 steel in 1M HCl solution by weight loss and potentiodynamic polarization techniques.The results show that the inhibition efficiencies of ABMI and BBMI were up to 95.20% and 87.32% by the inhibitor concentration of 100 mg/L in 1 M HCl solution at 25℃,respectively.ABMI was a mixed-type inhibitor,but BBMI was a mixed-type inhibitor which mainly inhibits anodic reaction.Their corrosion rate decreased with increasing temperature,but the corrosion inhibition of ABMI was better than BBMI at same temperature.The adsorption of the two compounds obeyed the Langmuir＇s adsorption isotherm and belonged to spontaneous chemisorptions.
出处
《四川理工学院学报（自然科学版）》
CAS
2011年第3期326-330,共5页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
基金
四川省自贡市科技局重点项目(08X01)
材料腐蚀与防护四川省高校重点实验室重点项目(2008CL04)
四川省教育厅重点项目(09ZA057)
四川理工学院科研基金项目(2009XJKPL004)
泸州老窖科研奖学金项目(09ljzk10)
关键词
2-巯基苯并咪唑
缓蚀剂
Q235钢
盐酸
吸附
2-Mercaptobenzimidazole
corrosion inhibitor
Q235 steel
Hydrochloric acid
adsorption
