双(1-氯-N-羟乙基吗啉-2-羟丙基)正十八烷胺的缓蚀性能  

Corrosin inhibition performrnce of bis(1-chloro-N-hydroxyethyl morpholinium-2-hydroxypropyl) n-octadecylamine

作　　者：郭睿[1] 马兰 王映月[1] 李云鹏 土瑞香 宋博 郭煜 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《化工进展》2018年第3期1145-1151,共7页Chemical Industry and Engineering Progress

基　　金：陕西省教育厅服务地方专项计划(15JF011);陕西省工业科技攻关项目(2016GY-146)

摘　　要：采用失重法、极化曲线、电化学阻抗谱和原子力显微镜等分析方法研究了实验室自制的双(1-氯-N-羟乙基吗啉-2-羟丙基)正十八烷胺对A3钢的缓蚀性能,并探讨了其在钢片表面的吸附行为。失重法结果表明,双(1-氯-N-羟乙基吗啉-2-羟丙基)正十八烷胺在质量浓度为0.4g/L、温度为45℃时其缓蚀效果良好,缓蚀率达到91.32%,并且随着酸浓度的增大缓蚀率减小。极化曲线测试结果表明双(1-氯-N-羟乙基吗啉-2-羟丙基)正十八烷胺属于以抑制阴极为主的混合型缓蚀剂。双(1-氯-N-羟乙基吗啉-2-羟丙基)正十八烷胺分子在钢片表面的物理吸附行为符合Langmuir吸附等温式,是以化学吸附为主结合物理吸附的混合吸附;A3钢在盐酸溶液中的腐蚀反应过程是自发的、吸热的,并伴随着熵增。The corrosin inhibition and adsorption behavior of bis（1-chloro-N-hydroxyethyl morpholinium-2-hydroxypropyl） n-octadecylamine on A3 steel were studied using weight loss method,polarization curve,electrochemical impedance spectroscopy,and atomic force microscope. The results showed that the corrosion inhibition effect of bis（1-chloro-N-hydroxyethyl morpholinium-2-hydroxypropyl） n-octadecylamine at a mass concentration of 0.4 g/L and a temperature of 45℃,the corrosion inhibition rate is 91.32%,and the corrosion rate decreased with increasing acid concentration. Polarization curve test results showed that morpholine quaternary ammonium salt was a cathode-based mixed corrosion inhibitor. The physical adsorption behavior of bis（1-chloro-Nhydroxyethyl morpholinium-2-hydroxypropyl） n-octadecylamine on the surface of steel sheet was in accordance with the Langmuir adsorption isotherm,which is based on chemical adsorption. The corrosion process of A3 steel in hydrochloric acid solution was spontaneous,endothermic,and accompanied by the entropy increase.

关 键 词：缓蚀剂 吗啉 缓蚀机理 吸附行为 Langmuir吸附等温式 

分 类 号：O626.4[理学—有机化学]