溴化-N-十六烷基-2-(4-羟基丁-2-炔)吡啶的合成及缓蚀性能  

Synthesis and Corrosion Inhibition of N-Alkyl-2-(4-hydroxybut-2-ynyl)pyridinium Bromide

作　　者：涂胜[1] 汤琪[1] 李传强[1] 

机构地区：[1]重庆交通大学理学院,重庆400074

出　　处：《精细化工》2015年第4期451-456,共6页Fine Chemicals

基　　金：国家自然科学基金(21307168);重庆市自然科学基金(cstcjj A50016)~~

摘　　要：以氯甲基吡啶、炔丙醇和溴代十六烷为原料,经炔化、季铵化反应合成了一种高温型酸化缓蚀剂:溴化-N-十六烷基-2-(4-羟基丁-2-炔)吡啶(O-16),其结构通过1HNMR、13CNMR和MS表征。用失重法、极化曲线法和交流阻抗法评价了O-16在HCl介质中对X70钢的缓蚀性能。结果表明,O-16对X70钢具有优异的缓蚀效果。在60℃,w(HCl)=20%的水溶液中,缓蚀率随O-16浓度的增加而增大,当O-16浓度为3×10-5mol/L时,缓蚀率达到99%。极化曲线法表明,O-16是以阴极抑制为主的混合型缓蚀剂。协同效应研究表明,O-16缓蚀剂分子内协同效应大于分子间协同效应,这为进一步寻找高温强酸型缓蚀剂指明了方向。同时用SEM观察了X70钢表面的形貌特征。N-Alkyl-2-（4-hydroxybut-2-ynyl） pyridinium bromides（designated as O-16） were synthesized and characterized by means of ^1HNMR,^13CNMR and MS.The inhibitive performance of O-16 on X70 steel in 20% HCl was evaluated by weight loss,Tafel polarization and EIS techniques.The results show that O-16 exhibited good inhibitive performance against hydrochloric acid corrosion for X70 steel.The inhibition efficiency increased with increasing concentration and could reach 99% at 3 × 10^-5mol/L of O-16 in 20% HCl at 60 ℃.Tafel polarization curves of X70 steel indicate that O-16 is a mixed-type inhibitor which controlled predominantly cathodic reaction.The intramolecular synergistic effect was better than synergistic effect between molecules,which pointed out the direction for further studies of corrosion inhibitors with high-temperature tolerance and strong-acid resistance.The corrosion products forming on X70 steel surface were observed by SEM.

关 键 词：炔丙醇 缓蚀剂 X70钢 金属腐蚀 协同效应 有机电化学与工业 

分 类 号：O626.32[理学—有机化学] TG174.42[理学—化学]