Corrosion inhibition of carbon steel in hydrochloric acid by cationic arylthiophenes as new eco-friendly inhibitors: Experimental and quantum chemical study  

作　　者：Abd El-Aziz S.Fouda Mohamed A.Ismail Abdulraqeb A.Al-Khamri Ashraf S.Abousalem 

机构地区：[1]Department of Chemistry,Faculty of Science,El-Mansoura University,El-Mansoura 35516,Egypt [2]Department of Chemistry,Faculty of Education,Arts and Sciences,University of Saba Region,Marib,Yemen [3]Quality Control Laboratory,Operations Department,Jotun,Egypt

出　　处：《Chinese Journal of Chemical Engineering》2021年第12期197-217,共21页中国化学工程学报（英文版）

基　　金：financial support provided by the Ministry of Higher Education&Scientific Research of Yemen。

摘　　要：This study describes the adsorption behavior of three arylthiophene derivatives namely:2-(4-amidino-3-fluorophenyl)-5-[4-methoxy phenyl] thiophene dihydrochloride salt(MA-1217),2-(4-amidinophenyl)-5-[4-chlorophenyll thiophene dihydrochloride salt(MA-1316) and 2-(4-amidino-3-fluorophenyl)-5-[4-ch lorophenyllthiophene dihydrochloride salt(MA-1312) at C-steel in 1.0 mol·L^(-1) HCl interface using experimental and theoretical studies.Electrochemical and mass loss measurements showed that the inhibition efficiency(IE) of the arylthiophene derivatives increases with increasing concentrations and exhibited maximum efficiency 89% at 21×10^(-6) mol·L^(-1)(MA-1217) by mass loss method.The investigated arylthiophene derivatives obey the Langmuir adsorption isotherm.From polarization studies the arylthiophene derivatives act as mixed-type inhibitors.Surface analysis were carried out and discussed.The mode of orientation and adsorption of inhibitor molecules on C-steel surface was studied using molecular dynamics(MD) simulations.Quantum chemical parameters as well as the radial distribution function indices and binding energies confirm the experimental results.

关 键 词：Carbon steel Corrosion inhibition Adsorption Arylthiophene derivatives Polarization Electrochemical frequency modulation 

分 类 号：TE98[石油与天然气工程—石油机械设备]