Experimental and theoretical evaluation of semicarbazones and thiosemicarbazones as organic corrosion inhibitors

被引：257

作者：

Goulart, Carla Marins ^{[1
]}

Esteves-Souza, Andressa ^{[1
]}

Martinez-Huitle, Carlos Alberto ^{[2
]}

Ferreira Rodrigues, Ciro Jose ^{[2
]}

Medeiros Maciel, Maria Aparecida ^{[2
]}

Echevarria, Aurea ^{[1
]}

机构：

[1] Univ Fed Rural Rio de Janeiro, Inst Ciencias Exatas, Dept Quim, BR-23890000 Seropedica, RJ, Brazil

[2] Univ Fed Rio Grande do Norte, Ctr Ciencias Exatas & Terra, Dept Quim, BR-59072970 Natal, RN, Brazil

来源：

CORROSION SCIENCE | 2013年 / 67卷

关键词：

Steel; Polarization; EIS; Modeling studies; Acid corrosion; HYDROCHLORIC-ACID SOLUTION; SCHIFF-BASE COMPOUNDS; MILD-STEEL CORROSION; 0.5 M H2SO4; MOLECULAR-STRUCTURE; DERIVATIVES; HCL; ADSORPTION; EFFICIENCY; BEHAVIOR;

D O I：

10.1016/j.corsci.2012.10.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The inhibition ability of four thiosemicarbazones (1A-D) and two semicarbazones (2A-B) towards carbon steel corrosion in 1.0 M HCl was evaluated by molecular modeling, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) at different inhibitor concentrations. Polarization curves showed that all of the evaluated compounds acted as mixed inhibitors. EIS plots indicated that the presence of the inhibitors increases the charge transfer resistance of the corrosion process, increasing the inhibition efficiency. The adsorption of the evaluated inhibitors obeys the Langmuir adsorption isotherm. The theoretical results were corroborated by experimental data, with both the experimental and theoretical data showing that the thiosemicarbazones are better corrosion inhibitors than the semicarbazones. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：281 / 291

页数：11

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