Department of Materials Science and Engineering, Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/gas Facilities, China University of Petroleum (Beijing), 18 Fuxue Road, Changping District, Beijing 102249, PR China; Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Department of Materials Science and Engineering, Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/gas Facilities, China University of Petroleum (Beijing), 18 Fuxue Road, Changping District, Beijing 102249, PR China.
J Colloid Interface Sci. 2018 Apr 15;516:398-406. doi: 10.1016/j.jcis.2018.01.088. Epub 2018 Feb 6.
We studied the inhibition performances of IMB (imidazoline quaternary salt (IM) and benzotriazole (BTAH)) and IMO (IM and octyl phenol ethoxylates (OP)) mixtures as inhibitors of L245 steel placed in 10 vol% HCl solution at 298 K using experimental methods and theoretical calculations. We found that the mixtures adsorb on the steel by an endothermic spontaneous process, and the adsorption model follows Langmuir isotherm. The mixtures exhibit good synergistic inhibition effect, and the inhibition efficiency enhanced in turn (IMB < IMO). The relationship between synergistic effect of organic inhibitors and their energetic position of molecular frontier orbitals was discussed.
我们采用实验方法和理论计算研究了 IM 季铵盐（IM）和苯并三氮唑（BTAH）混合物（IMB）和 IM 与辛基酚聚氧乙烯醚（OP）混合物（IMO）作为 L245 钢在 298K、10vol% HCl 溶液中缓蚀剂的抑制性能。结果表明，混合物通过一个吸热自发过程在钢表面吸附，吸附模型符合 Langmuir 等温线。混合物表现出良好的协同抑制效果，且协同效应依次增强（IMB<IMO）。讨论了有机缓蚀剂的协同效应与其分子前线轨道能级位置的关系。
