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
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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(Hbb Imet) was synthesized by DL-malic acid and ophenylenediamine in ethylene glycol in different hydrochloride forms.The corrosion inhibition performance of Hbb Imet 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 Hbb Imet on Q235 steel was also discussed.The results showed that the inhibition efficiency increased with the increasing of Hbb Imet concentration at 25℃,and the inhibition efficiency can up to 92.23% when the concentration of Hbb Imet is 120 mg/L.The addition of Hbb Imet 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.
1,2-Bis-(1-H-benzoimidazol-2-yl) ethanol(Hbb Imet) was synthesized by DL-malic acid and ophenylenediamine in ethylene glycol in different hydrochloride forms.The corrosion inhibition performance of Hbb Imet 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 Hbb Imet on Q235 steel was also discussed.The results showed that the inhibition efficiency increased with the increasing of Hbb Imet concentration at 25℃,and the inhibition efficiency can up to 92.23% when the concentration of Hbb Imet is 120 mg/L.The addition of Hbb Imet 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.
引文
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[6]贾明子,张哲,阮乐等.表面技术,2013,42(3):23~27.
[7]李伟华,陶志华,张胜涛等.腐蚀科学与防护技术,2010,22(1):39~42.
[8]马柏林,高娟丽,闫宣凯等.西北林学院学报,2012,27(3):135~138.
[9]杨艳芳,林娟娟,李雪华等.化学研究与应用,2018,30(7):1106~1113.
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[15]邵明文,史会兵,张成富等.化工管理,2018,22(8):115~117.
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[17]X Li,S Deng,X Xie et al.Corros.Sci.,2014,87(87):15~26.
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[20]文家新,张欣,刘云霞等.材料保护,2018,51(9):49~53.