2-(4-{[4-Methyl-6-(1-methyl-1H-1,3-benzodiazol-2- yl)-2-propyl-1H-1,3-benzodiazol-1-yl] methyl} phenyl) benzoic acid as green corrosion inhibitor for mild steel in 1 M hydrochloric acid

被引：19
|
作者：
Verma, Chandrabhan [1 ]
Quraishi, M. A. [1 ]
Gupta, Neeraj Kumar [1 ]
机构：
[1] Banaras Hindu Univ, Indian Inst Technol, Dept Chem, Varanasi 221005, Uttar Pradesh, India
来源：
AIN SHAMS ENGINEERING JOURNAL | 2018年 / 9卷 / 04期
关键词：
Mild steel; Acid corrosion; Telmisartan; SEM/EDX/AFM; EIS/Bode/Tafel curves; M HCL; SURFACE; ADSORPTION; EXTRACTS; ALUMINUM; H2SO4; UREA;
D O I：
10.1016/j.asej.2016.07.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Present study describes the inhibition property of benzo 1,3-diazol 2-(4-[4-Methyl-6-(1-methyl-1H-1,3-benzodiazol-2-yl)-2-propy1-1H-1,3-benzodiazol-1-yl] methyl} phenyl) benzoic acid (Telmisartan, Cresar-H) on mild steel corrosion in 1 M HCl using weight loss, electrochemical, and surface measurements. Results showed that the corrosion inhibition efficiency (eta%) increases with increasing Telmisartan concentration and attained the maximum value of 97.39% at 125 mg L-1 concentration. Polarization studies revealed that Telmisartan acted as cathodic type inhibitor. Electrochemical impedance spectroscopy (EIS) studies suggested that the Telmisartan inhibits mild steel corrosion by becoming adsorbate at the metallic/electrolyte surfaces. Among the several tested isotherms, adsorption of the Telmisartan on mild steel surface obeyed the Temkin adsorption isotherm. The values of the apparent activation energy (E-a) suggested that Telmisartan inhibited metallic corrosion by creating energy barrier for corrosion process. The adsorption of corrosion inhibition was well supported by SEM/EDX and AFM studies. (C) 2016 Ain Shams University.
引用
收藏
页码：1225 / 1233
页数：9
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