Effect of Equisetum arvense extract as corrosion inhibitor of A36 steel in sulfuric acid solution

被引:13
|
作者
Ramirez-Peralta, Gladiola I. [1 ]
Leon-Silva, Ulises [2 ]
Nicho Diaz, Maria E. [1 ]
Valladares-Cisneros, Maria G. [3 ]
机构
[1] Univ Autonoma Estado Morelos, Ctr Invest Ingn & Ciencias Aplicadas, ICCBA, Univ 1001, Cuernavaca 62210, Morelos, Mexico
[2] Inst Nacl Elect & Energias Limpias, Reforma 113, Cuernavaca 62490, Morelos, Mexico
[3] Univ Autonoma Estado Morelos, Fac Ciencias Quim & Ingn, Ave Univ 1001, Cuernavaca 62209, Morelos, Mexico
来源
关键词
A36; steel; corrosion inhibitor; Equisetum arvense; sulfuric acid; MILD-STEEL; HIBISCUS-SABDARIFFA; LEAVES EXTRACT; CARBON-STEEL; ADSORPTION; ALUMINUM; MEDIA;
D O I
10.1002/maco.201810119
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The Equisetum arvense extract was prepared by the maceration technique and experimentally tested as a corrosion inhibitor of A36 steel in 0.5 M sulfuric acid at room temperature. The corrosion resistance was estimated by the determination of the polarization curves, linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). In order to study the effect of the Equisetum arvense extract on the superficial morphology of metal, scanning electronic microscopy (SEM) was used. The results indicated a decrease of about two orders of magnitude in the corrosion rate, an increase in polarization resistance and a greater efficiency of inhibition by increasing the concentration of extract. The corrosion mechanism was mainly controlled by charge transfer from metal to the environment through the double electrochemical layer. The SEM images corroborated the results obtained in the corrosion tests, at higher concentration of extract less metal surface damage was observed.
引用
收藏
页码:1631 / 1637
页数:7
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