Corrosion inhibition of mild steel in acidic solution by Tagetes erecta (Marigold flower) extract as a green inhibitor

被引：421
作者：
Mourya, Punita [1 ]
Banerjee, Sitashree [1 ]
Singh, M. M. [1 ]
机构：
[1] Banaras Hindu Univ, Indian Inst Technol, Dept Chem, Varanasi 221005, Uttar Pradesh, India
来源：
CORROSION SCIENCE | 2014年 / 85卷
关键词：
Mild steel; AFM; EIS; Polarization; Acid corrosion; Acid inhibition; LOW-CARBON STEEL; THEORETICAL EVALUATION; PLANT-EXTRACTS; LEAVES EXTRACT; SCHIFF-BASE; HCL; DERIVATIVES; ADSORPTION; MECHANISM; IMPEDANCE;
D O I：
10.1016/j.corsci.2014.04.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The extract of Tagetes erecta (Marigold flower) [TEE] has been evaluated as a corrosion inhibitor for mild steel in 0.5 M H2SO4 solution by means of gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopic measurements. Tafel polarization studies reveal that TEE acts as an efficient mixed inhibitor. The adsorption of the inhibitor on the mild steel (MS) surface follows the Langmuir adsorption isotherm, indicating monolayer adsorption. The activation parameters governing adsorption show that the inhibitor is physically adsorbed. The results of quantum chemical calculation indicate high feasibility of adsorption of molecular and protonated Lutein, a major component of TEE. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：352 / 363
页数：12
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