Experimental and theoretical investigation of organic compounds as inhibitors for mild steel corrosion in sulfuric acid medium

被引：346
|
作者：
Bahrami, M. J. [1 ]
Hosseini, S. M. A. [1 ]
Pilvar, P. [2 ]
机构：
[1] Shahid Bahonar Univ Kerman, Dept Chem, Kerman 76169, Iran
[2] Payame Noor Univ, Dept Chem, Kerman, Iran
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 09期
关键词：
Mild steel; SEM; IR spectroscopy; Acid inhibition; COLD-ROLLED STEEL; 1 M HCL; HYDROCHLORIC-ACID; SCHIFF-BASES; TRIAZOLE DERIVATIVES; MOLECULAR-STRUCTURE; CHEMICAL-STRUCTURE; CHLORIDE SOLUTIONS; QUANTUM-CHEMISTRY; ALUMINUM SURFACE;
D O I：
10.1016/j.corsci.2010.04.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three synthesized organic compounds were tested as corrosion inhibitors for mild steel in sulfuric acid medium by potentiostatic polarization, FTIR spectroscopy and SEM techniques. Quantum chemical parameters were also calculated to characterize adsorption mechanism. Acceptable correlations were obtained between inhibition efficiency and the calculated quantum chemical parameters. It was found that the investigated compounds exhibit a good inhibition effect especially at 8-10 ppm range concentration, which makes them commercially important. The adsorption of inhibitors on the surface obeys Langmuir adsorption isotherm. The values of activation energy and the thermodynamic parameters, such as K-ads, Delta G degrees(ads), Delta H degrees(ads) and Delta S degrees(ads) were calculated. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2793 / 2803
页数：11
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