Task-specific ionic liquids as corrosion inhibitors on carbon steel in 0.5 M HCl solution: An experimental and theoretical study

被引：144
|
作者：
Cao, Shuyun [1 ,2 ]
Liu, Dan [3 ,4 ]
Ding, Hui [5 ]
Wang, Jinghui [3 ,4 ]
Lu, Hui [6 ]
Gui, Jianzhou [1 ,2 ,3 ,4 ]
机构：
[1] Tianjin Polytech Univ, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China
[2] Tianjin Polytech Univ, Sch Mat Sci & Engn, Tianjin 300387, Peoples R China
[3] Tianjin Polytech Univ, Sch Chem & Chem Engn, Tianjin 300387, Peoples R China
[4] Tianjin Polytech Univ, Tianjin Key Lab Green Chem Technol & Proc Engn, Tianjin 300387, Peoples R China
[5] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
[6] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
来源：
CORROSION SCIENCE | 2019年 / 153卷
基金：
中国国家自然科学基金;
关键词：
Ionic liquid; Corrosion; Acid inhibition; Bronsted acid; Carbon steel; HYDROCHLORIC-ACID SOLUTION; MILD-STEEL; SULFURIC-ACID; IRON; DERIVATIVES; ADSORPTION; BEHAVIOR; SURFACTANTS; METHIONINE; EXTRACT;
D O I：
10.1016/j.corsci.2019.03.035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigated corrosion inhibition of task-specific ionic liquids, 1-(4-sulfonic acid) butyl-3-ethyl imidazolium hydrogen sulfate and 1-(4-sulfonic acid) butyl-3-decyl imidazolium hydrogen sulfate, for carbon steel in 0.5 M HCl by electrochemical tests, SEM, UV-vis, XPS, contact angle measurements, molecular orbital theory, and MD simulations. The inhibition efficiency of both ionic liquids increased with concentration, and the latter one shows higher inhibition efficiency of 97.9% due to the weaker hydrophilicity caused by increased alkyl tail. The mechanism of inhibition was found to be through adsorption onto the steel surface with cycling donation and back-donation of electrons.
引用
收藏
页码：301 / 313
页数：13
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