1,2-二(苯并咪唑-2-基)乙醇的合成及其对Q235钢的缓蚀性能研究  

Synthesis of 1,2-Bis-(1-H-benzoimidazol-2-yl) ethanol and Its Corrosion Inhibition Performance on Q235 Steel

作　　者：文家新[1] 刘云霞[1] 刘克建[1] 和志强 李应[1] Wen Jiaxin;Liu Yunxia;Liu Kejian;He Zhiqiang;Li Ying(School of Chemical & Pharmaceutical Engineering,Chongqing Industry Polytechnic College,Chongqing 401120)

机构地区：[1]重庆工业职业技术学院化学与制药工程学院

出　　处：《化学通报》2019年第6期522-526,共5页Chemistry

基　　金：重庆市教委科学技术研究项目(KJ1603011);重庆工业职业技术学院科研项目(GZY201708-ZA);重庆工业职业技术学院骨干人才项目资助

摘　　要：通过DL-苹果酸与邻苯二胺盐酸盐在乙二醇中发生缩合反应,合成了一种双苯并咪唑化合物1,2-二(苯并咪唑-2-基)乙醇(Hbb Imet),采用静态失重法、极化曲线法和电化学阻抗谱研究了Hbb Imet在0.5mol/L的盐酸溶液中对Q235钢的缓蚀性能,并探讨了缓蚀机理。结果表明,25℃下Hbb Imet的缓蚀效率随其浓度的增加而增大,当Hbb Imet浓度为120mg/L时,其缓蚀效率可达92.23%,具有良好的缓蚀性能。Hbb Imet的添加显著增大了腐蚀反应的表观活化能,有效抑制了腐蚀反应的进行,是一种以控制阴极析氢过程为主的混合型缓蚀剂。1,2-Bis-(1-H-benzoimidazol-2-yl)ethanol(HbbImet)was synthesized by DL-malic acid and ophenylenediamine in ethylene glycol in different hydrochloride forms.The corrosion inhibition performance of HbbImet for Q235 steel was tested by mass loss method,polarization curve,electrochemical impedance spectroscopy(EIS)in 0.5 mol/L HCl solution,and the corrosion inhibition mechanism of HbbImet on Q235 steel was also discussed.The results showed that the inhibition efficiency increased with the increasing of HbbImet concentration at 25℃,and the inhibition efficiency can up to 92.23%when the concentration of HbbImet is 120mg/L.The addition of HbbImet significantly increases the apparent activation energy of the corrosion reaction and effectively inhibits the progress of the corrosion reaction.It is a mix-type corrosion inhibitor mainly controlling the hydrogen evolution process of the cathode.

关 键 词：1 2-二(苯并咪唑-2-基)乙醇 Q235钢 缓蚀剂 电化学阻抗谱 

分 类 号：TG174.42[金属学及工艺—金属表面处理]