Chemical synthesis and characterization of a soluble copolymer poly (methoxyaniline-co-orthotoluidine), application as corrosion inhibitor of carbon steel in 3% NaCl medium

被引：13

作者：

Benchikh, Abdelkader ^{[1
]}

Belkacemi, Samir ^{[1
]}

Maizia, Radouane ^{[1
]}

Mezian, Karim ^{[2
]}

Makhloufi, Laid ^{[1
]}

Saidani, Boualem ^{[1
]}

机构：

[1] Univ Bejaia, Fac Technol, Lab Electrochim Corros & Valorisat Energet LECVE, Bejaia 06000, Algeria

[2] British Petr Algeria, Base 24 Fevrier Hassi Messaoud, Hassi Messaoud 30500, Ouargla, Algeria

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2023年 / 1274卷

关键词：

Copolymerization; Poly(metoxyaniline-co-orthotoluidine); Corrosion inhibition; Carbon steel; Chemical synthesis; Polyortotoluidine; DFT method; MILD-STEEL; ACIDIC MEDIA; ELECTROCHEMICAL SYNTHESIS; MOLECULAR-STRUCTURE; IRON; DERIVATIVES; CEMENTATION; POLYANILINE; EXTRACT; COPPER;

D O I：

10.1016/j.molstruc.2022.134562

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：

A copolymer and polymers were synthesized by chemical oxidative polymerization using ammonium per -sulfate as an oxidant in hydrochloride aqueous medium. The resultant copolymer and polymers were characterized by Fourier transform infrared (FTIR), UV-vis spectroscopy, XRD and TGA analysis, which re-veals a significant improvement in the thermal stability of the copolymer. The copolymer is soluble in various organic solvents such as DMF, DMSO, THF and acetonitrile. The performance of this copolymer as corrosion inhibitor for carbon steel corrosion in 3% NaCl solution was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The copolymer acts as an ef-fective corrosion inhibitor for carbon steel. The inhibition process is attributed to the formation of an adsorbed film of copolymer on the metal surface which protects the metal against corrosion. The ex-perimental results indicate that copolymer has good corrosion inhibition performance and the protection efficiency increased with increase in inhibitor concentration. The molecular structure effect on the corro-sion inhibition efficiency was investigated using DFT calculations. The parameters for the structural and electronic systems were calculated and discussed. The obtained results show that the experimental stud-ies agree well and confirm that the copolymer is the good inhibitor.(c) 2022 Elsevier B.V. All rights reserved.

引用

页数：15

共 73 条

[1] Natural nutmeg oil as a green corrosion inhibitor for carbon steel in 1.0 M HCl solution: Chemical, electrochemical, and computational methods [J].