羟基取代菲并咪唑衍生物对低碳钢的缓蚀性能  

Corrosion inhibition performance of hydroxy-substituted phenanthroimidazole derivatives for mild steel

作　　者：赵若彤 吕艳丽[1] 周丽 李晓[1] 汪琦 王艳秋[1] ZHAO Ruo-tong;LYV Yan-li;ZHOU Li;LI Xiao;WANG Qi;WANG Yan-qiu(School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Angang mining design and Research Institute Co.,Ltd,Anshan 114000,China;School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051 [2]鞍钢集团矿业设计研究院有限公司,辽宁鞍山114000 [3]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《化学研究与应用》2022年第10期2333-2341,共9页Chemical Research and Application

基　　金：辽宁省教育厅科技计划项目(2016TSPY09)资助。

摘　　要：通过分子设计,增大邻菲罗啉平面结构,在不同位次引入-OH,合成2-(2-羟基苯基)-1H-咪唑[4,5-f][1,10]邻菲啰啉(2HIP)、2-(3-羟基苯基)-1H-咪唑[4,5-f][1,10]邻菲啰啉(3HIP)和2-(4-羟基苯基)-1H-咪唑[4,5-f][1,10]邻菲啰啉(4HIP)等三种羟基取代菲并咪唑衍生物。采用失重法、电化学法以及扫描电镜等研究其在1mol·L^(-1) HCl溶液中对低碳钢的缓蚀性能。三种缓蚀剂在低碳钢表面服从Langmuir吸附,缓蚀效率在实验浓度范围内均超过了90%,且4HIP具有最好的缓蚀效果,最高缓蚀效率为96.36%。DFT理论计算探讨了三种缓蚀剂分子结构与缓蚀剂效率关系,理论计算与实验结果具有一致性。In order to increase the molecular plane,three hydroxyl-substituted phenanthroimidazole derivatives(2-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)phenol(2HIP),3-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)phenol(3HIP)and 4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)phenol(4HIP))were synthesized by molecular design.The synthesized compounds of 2HIP,3HIP and 4HIP as novel corrosion inhibitors for mild steel in 1mol·L^(-1) HCl solution was evaluated by weight loss measurement,electrochemical method and scanning electron microscope(SEM)analysis.The results showed that the inhibition efficiency of three corrosion inhibitors exceeded 90%among testing concentration,and the inhibit ability of 4HIP was the best which was up to 96.36%with the concentration of 1.0mmol·L^(-1) . The corrosion inhibitors on mild steel surface obeyed Langmuir adsorption isotherm.We discussed the relationship between molecular structure of the three kinds of corrosion inhibitors and the corrosion inhibition in density functional theory(DFT). The theoretical evaluation accorded well with the experiment results.

关 键 词：盐酸溶液 缓蚀剂 羟基取代菲并咪唑衍生物 低碳钢 缓蚀性能 

分 类 号：TG174.42[金属学及工艺—金属表面处理]