Experimental and quantum chemical characterization of the adsorption of some Schiff base compounds of phthaloyl thiocarbohydrazide on the mild steel in acid solutions

被引：117
|
作者：
Ahamad, I. [1 ]
Prasad, R. [2 ]
Quraishi, M. A. [1 ]
机构：
[1] Banaras Hindu Univ, Inst Technol, Dept Appl Chem, Varanasi 221005, Uttar Pradesh, India
[2] SGB Amravati Univ, Dept Chem, Amravati 444602, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 124卷 / 2-3期
关键词：
Metals; Corrosion; Electrochemical techniques; Adsorption; CORROSION INHIBITION; SULFURIC-ACID; TRIAZOLE DERIVATIVES; EFFICIENCY; COMPLEXES; COPPER; IRON;
D O I：
10.1016/j.matchemphys.2010.08.051
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three derivatives of 2-[2-(hydrazinecarbonothioyl)hydrazinecarbonyl]benzoic acid (IL1) have been evaluated as new corrosion inhibitors for the corrosion of mild steel in 1 M HCl solutions using weight loss polarization and electrochemical Impedance spectroscopy (EIS) techniques The adsorption of these compounds has been tested thermodynamically which was found to be of neither a typical physisorption nor a typical chemisorption mode The thermodynamic functions (such as E-a Delta H degrees(ads) Delta S degrees(ads) and Delta G degrees(ads)) of dissolution and adsorption processes have been evaluated The polarization measurements indicated that the inhibitors are of mixed type The adsorption of the compounds was found to obey Langmuir s adsorption isotherm In addition quantum chemical calculations have been made to correlate inhibition efficiencies determined experimentally (C) 2010 Elsevier B V All rights reserved
引用
收藏
页码：1155 / 1165
页数：11
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