Thermodynamic, electrochemical and quantum chemical investigation of some Schiff bases as corrosion inhibitors for mild steel in hydrochloric acid solutions

被引：436

作者：

Ahamad, Ishtiaque ^{[1
]}

Prasad, Rajendra ^{[2
]}

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

机构：

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

[2] Banaras Hindu Univ, Fac Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 03期

关键词：

Mild steel; Acid solutions; Weight loss; Polarization; Acid corrosion; SET MODEL CHEMISTRY; TRIAZOLE DERIVATIVES; CARBON-STEEL; IMPEDANCE SPECTROSCOPY; TOTAL ENERGIES; HCL SOLUTIONS; PART I; IRON; ADSORPTION; MEDIA;

D O I：

10.1016/j.corsci.2009.11.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion inhibition of mild steel in 1.0 M HCl solution by four Schiff bases was investigated using weight loss and electrochemical measurements and quantum chemical calculations. All compounds showed >90% inhibition efficiency at their optimum concentrations. The activation energy (E-a) of corrosion and other thermodynamic parameters were calculated to elaborate the mechanism of corrosion inhibition. The adsorption of the inhibitors on the mild steel surface follows Langmuir isotherm model. Polarization studies indicated that all studied inhibitors are mixed type. The computed quantum chemical properties viz., electron affinity (EA) and molecular band gap (Delta E-MBG) show good correlation with experimental inhibition efficiencies. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：933 / 942

页数：10

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