双(1-氯-N-羟乙基吗啉鎓-2-羟丙基)正十八烷胺的缓蚀性能

doi:10.16085/j.issn.1000-6613.2017-1162

化工进展 ›› 2018, Vol. 37 ›› Issue (03): 1145-1151.DOI: 10.16085/j.issn.1000-6613.2017-1162

双(1-氯-N-羟乙基吗啉鎓-2-羟丙基)正十八烷胺的缓蚀性能

郭睿, 马兰, 王映月, 李云鹏, 土瑞香, 宋博, 郭煜

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

收稿日期:2017-06-23 修回日期:2017-08-25 出版日期:2018-03-05 发布日期:2018-03-05
通讯作者: 郭睿(1959-),男,硕士,教授,主要研究各种助剂。
基金资助:
陕西省教育厅服务地方专项计划（15JF011）及陕西省工业科技攻关项目（2016GY-146）。

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

GUO Rui, MA Lan, WANG Yingyue, LI Yunpeng, TU Ruixiang, SONG Bo, GUO Yu

Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry of the Ministry of Education, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi, China

Received:2017-06-23 Revised:2017-08-25 Online:2018-03-05 Published:2018-03-05

摘要/Abstract

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-羟乙基吗啉鎓-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-羟乙基吗啉鎓-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-羟乙基吗啉鎓-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-羟乙基吗啉鎓-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。

关键词: 缓蚀剂, 吗啉, 缓蚀机理, 吸附行为, Langmuir吸附等温式

Abstract: 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 0.4g/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-N-hydroxyethyl 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.

Key words: corrosion inhibitor, morpholine, corrosion inhibition mechanism, adsorption behavior, Langmuir adsorption isotherm

中图分类号:

O626.4

郭睿, 马兰, 王映月, 李云鹏, 土瑞香, 宋博, 郭煜. 双(1-氯-N-羟乙基吗啉鎓-2-羟丙基)正十八烷胺的缓蚀性能[J]. 化工进展, 2018, 37(03): 1145-1151.

GUO Rui, MA Lan, WANG Yingyue, LI Yunpeng, TU Ruixiang, SONG Bo, GUO Yu. Corrosin inhibition performrnce of bis(1-chloro-N-hydroxyethyl morpholinium-2-hydroxypropyl) n-octadecylamine[J]. Chemical Industry and Engineering Progress, 2018, 37(03): 1145-1151.

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双(1-氯-N-羟乙基吗啉鎓-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

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