Corrosion inhibition performance of newly synthesized 5-alkoxymethyl-8-hydroxyquinoline derivatives for carbon steel in 1 M HCl solution: experimental, DFT and Monte Carlo simulation studies

被引:165
作者
El Faydy, M. [1 ]
Touir, R. [2 ,3 ]
Touhami, M. Ebn [2 ]
Zarrouk, A. [4 ]
Jama, C. [5 ]
Lakhrissi, B. [1 ]
Olasunkanmi, L. O. [6 ,7 ]
Ebenso, E. E. [6 ]
Bentiss, F. [5 ,8 ]
机构
[1] Univ Ibn Tofail, Fac Sci, Lab Agroressources Polymeres & Genie Proc, Kenitra, Morocco
[2] Univ Ibn Tofail, Fac Sci, Lab Electrochim Corros & Environm, Kenitra, Morocco
[3] Reg Ctr Educ & Training CRMEF, Ave Allal Al Fassi,Madinat Irfane POB 6210, Rabat, Morocco
[4] First Mohammed Univ, Fac Sci, LC2AME, POB 717, Oujda 60000, Morocco
[5] Univ Lille, CNRS, INRA, ENSCL,UMET,UMR 8207, F-59000 Lille, France
[6] North West Univ, Fac Nat & Agr Sci, Mat Sci Innovat & Modelling MaSIM Res Focus Area, Mafikeng Campus,Private Bag X2046, ZA-2735 Mmabatho, South Africa
[7] Obafemi Awolowo Univ, Fac Sci, Dept Chem, Ife 220005, Nigeria
[8] Chouaib Doukkali Univ, Fac Sci, Lab Catalysis & Corros Mat, POB 20, M-24000 El Jadida, Morocco
关键词
RAY PHOTOELECTRON-SPECTROSCOPY; MILD-STEEL; HYDROCHLORIC-ACID; PHOSPHORIC-ACID; STAINLESS-STEEL; IRON CORROSION; ALKYL CHAIN; ADSORPTION; SURFACE; BEHAVIOR;
D O I
10.1039/c8cp03226b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Three new organic compounds primarily based on 8-hydroxyquinoline have been successfully synthesized and characterized via different spectroscopic methods (FTIR, H-1, and C-13 NMR). The synthesized compounds, namely 5-propoxymethyl-8-hydroxyquinoline (PMHQ), 5-methoxymethyl-8-hydroxyquinoline (MMHQ) and 5-hydroxymethyl-8-hydroxyquinoline (HMHQ), were evaluated as corrosion inhibitors for carbon steel in 1 M HCl solution using electrochemical impedance spectroscopy, potentiodynamic polarization and weight loss measurements at 298 K. Electrochemical measurements confirmed that the newly synthesized 5-alkoxymethyl-8-hydroxyquinoline derivatives are mixed type corrosion inhibitors and confirmed maximum protection efficiencies of 94, 89 and 81% for PMHQ, MMHQ, and HMHQ, respectively, at the optimum concentration of 10(-3) M. The EIS spectra confirmed a slightly depressed semi-circle profile with a single time constant in Bode diagrams for the three organic compounds over the whole concentration and temperature ranges studied. The adsorption of PMHQ, MMHQ, and HMHQ on the carbon steel surface followed the Langmuir adsorption isotherm. In addition, the kinetic and thermodynamic parameters for carbon steel corrosion and inhibitor adsorption, respectively, were determined and discussed. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses supported the formation of a protective film on carbon steel in the presence of PMHQ, MMHQ, and HMHQ. Density functional theory calculations (DFT) showed that the effectiveness of the inhibitive actions of the studied compounds correlates well with their electron donating ability, whilst Monte Carlo simulations revealed that the extent and favourability of adsorption of inhibitor molecules on the carbon steel surface establish their corrosion inhibition performances.
引用
收藏
页码:20167 / 20187
页数:21
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