Chitosan Schiff base: an environmentally benign biological macromolecule as a new corrosion inhibitor for oil & gas industries

被引:125
作者
Ansari, K. R. [1 ]
Chauhan, Dheeraj Singh [1 ]
Quraishi, M. A. [1 ]
Mazumder, Mohammad A. J. [2 ]
Singh, Ambrish [3 ]
机构
[1] King Fahd Univ Petr & Minerals, Res Inst, Ctr Res Excellence Corros, Dhahran 31261, Saudi Arabia
[2] King Fahd Univ Petr & Minerals, Chem Dept, Dhahran 31261, Saudi Arabia
[3] Southwest Petr Univ, Sch Mat Sci & Engn, Chengdu 610500, Sichuan, Peoples R China
关键词
CO2; corrosion; J55 tubular steel; Scanning Kelvin probe; Chitosan; Electrochemical measurements; CARBON-DIOXIDE CORROSION; ECO-FRIENDLY INHIBITOR; MILD-STEEL CORROSION; 1 M HCL; CO2-SATURATED BRINE; N80; STEEL; FUNCTIONALIZED CHITOSAN; CO2; CORROSION; Q235; PERFORMANCE;
D O I
10.1016/j.ijbiomac.2019.12.106
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
An eco-friendly Schiff base, namely Salicylaldeyde-Chitosan Schiff Base (SCSB), was synthesized by the reaction of chitosan and salicylaldehyde. In 3.5% NaCl saturated with carbon dioxide at 65 degrees C corrosion inhibition effect was analyzed using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) methods. The PDP results revealed that SCSB acts as a mixed type inhibitor and reduces the corrosion process effectively at 150 mg L-1 concentration with an inhibition efficiency of 95.2% and corrosion rate of 0.444 mm/y. EIS measurements suggest that the corrosion inhibition process is kinetically controlled. Langmuir adsorption model is the best fit among the other tested isotherms. The surface analysis was carried out using scanning electron microscopy (SEM), atomic force microscopy (AFM), scanning Kelvin probe (SKP), and X-ray photoelectron spectroscopy (XPS) to corroborate the formation of inhibitor film on the metal surface. Computational studies showed the effective adsorption of the protonated form of inhibitor. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:305 / 315
页数:11
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