5-(Phenylthio)-3H-pyrrole-4-carbonitriles as effective corrosion inhibitors for mild steel in 1 M HCl: Experimental and theoretical investigation

被引：160

作者：

Verma, Chandrabhan ^{[1
]}

Ebenso, E. E. ^{[2
,3
]}

Bahadur, I. ^{[2
,3
]}

Obot, I. B. ^{[4
]}

Quraishi, M. A. ^{[1
]}

机构：

[1] Banaras Hindu Univ, Indian Inst Technol, Dept Chem, Varanasi 221005, Uttar Pradesh, India

[2] North West Univ, Fac Agr Sci & Technol, Sch Math & Phys Sci, Dept Chem, ZA-2735 Mmabatho, South Africa

[3] North West Univ, Fac Agr Sci & Technol, Mat Sci Innovat & Modelling MaSIM Res Focus Area, ZA-2735 Mmabatho, South Africa

[4] King Fahd Univ Petr & Minerals, Res Inst, Ctr Res Excellence Corros, Dhahran 31261, Saudi Arabia

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2015年 / 212卷

关键词：

Mild steel; Corrosion; SEM/AFM; Polarization; Mixed type; Monte Carlo simulation; CARBON-STEEL; ACID SOLUTIONS; SCHIFF-BASE; DERIVATIVES; SURFACE; ADSORPTION; CHLORIDE;

D O I：

10.1016/j.molliq.2015.09.009

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：

The adsorption and inhibition effects of three 5-(phenylthio)-3H-pyrrole-4-carbonitriles (PPCs) namely: 2-amino-3-methyl-3-phenyl-5-(phenylthio)-3H-pyrrole-4-carbonitrile (PPC I), 2-amino-3-(4-hydroxyphenyl)-3-methyl-5-(phenylthio)-3H-pyrrole-4-carbonitrile (PPC II), and 2-amino-3-(2,4-dihydroxypheny1)-3-methyl-5-(phenylthio)-3H-pyrrole-4-carbonitrile (PPC III) on mild steel corrosion in 1 M HCl have been studied by experimental and theoretical methods. Results showed that inhibition efficiency increases with concentration and maximum value was obtained at 50 mg/L concentration. From the results it is concluded that the PPCs inhibited mild steel corrosion in 1 M HCl by adsorbing on the metal surface. Polarization results showed that the PPCs act as anodic type inhibitors. The surface morphology study was carried out by scanning electron microscopy (SEM) and atomic force microscopy (AFM).The Monte Carlo simulation were found to be in good agreement with the experimental results. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：209 / 218

页数：10

共 55 条

[1] Experimental and computational investigation on the corrosion inhibition characteristics of mild steel by some novel synthesized imines in hydrochloric acid solutions [J].