Newly synthesized indolium-based ionic liquids as unprecedented inhibitors for the corrosion of mild steel in acid medium
作者:Saleh A. Ahmed、Mohamed I. Awad、Ismail I. Althagafi、Hatem M. Altass、Moataz Morad、Ahmed Alharbi、Rami J. Obaid
DOI:10.1016/j.molliq.2019.111356
日期:2019.10
characterized. The adsorption and corrosion inhibition effect of those IBILs have been studied using polarization measurements and cyclic voltammetry. It has been found that the inhibitive effect of the corrosion of mild steel in 0.5 M H2SO4 is inherently dependent on the structure of the studied IBILs; IBILs with bromide as an anionic head are more efficient than those with iodide. Thermodynamic calculations
化学式为5-甲氧基-1,2,3,3-四甲基-3 H的基于吲哚的离子液体(IBILs)-碘化吲哚鎓(IBIL-1),1-(2-羧乙基)-2,3,3 -三甲基-3 H-碘化吲哚(IBIL-II),2,3,3-三甲基-1-(吡啶-2-基甲基)-3 H-碘化碘(IBIL-III),1-(3-乙氧基- 3-氧丙基)-2,3,3-三甲基-3 H-溴化吲哚鎓(IBIL-IV)和1-(2-乙氧基-2-氧乙基)-2,3,3-三甲基-3 H-溴化吲哚鎓( IBIL-V)已经合成并表征。使用极化测量和循环伏安法研究了这些IBIL的吸附和缓蚀作用。已经发现,低碳钢在0.5 MH 2 SO 4中的腐蚀抑制作用固有地取决于所研究的IBIL的结构;用溴化物作为阴离子头的IBIL比用碘化物的IBIL更有效。热力学计算表明,在钢表面的吸附符合Langmuir吸附等温线。电化学测量表明,具有最高抑制效率的IBIL-IV主要起