Use of Curcuma and Curcumin as a Green Corrosion Inhibitors for carbon Steel in Sulfuric Acid

被引：22

作者：

Flores-Frias, E. A. ^{[1
]}

Barba, V. ^{[2
]}

Lucio-Garcia, M. A. ^{[3
]}

Lopez-Cecenes, R. ^{[1
]}

Porcayo-Calderon, J. ^{[1
]}

Gonzalez-Rodriguez, J. G. ^{[1
]}

机构：

[1] Univ Autonoma Estado Morelos, CIICAp, Ave Univ 1001, Cuernavaca 62209, Morelos, Mexico

[2] Univ Autonoma Estado Morelos, CIQ, Ave Univ 1001, Cuernavaca 62209, Morelos, Mexico

[3] Univ Autonoma Yucatan, Fac Quim, C 43 613 X C 90, Merida 97069, Yucatan, Mexico

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2019年 / 14卷 / 06期

关键词：

Carbon steel; acid corrosion; green inhibitor; MILD-STEEL; LONGA L; ESSENTIAL OIL; MONTE-CARLO; ADSORPTION; EXTRACT; 2-MERCAPTOBENZIMIDAZOLE; SURFACE; YIELD;

D O I：

10.20964/2019.06.53

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The use of Curcuma (Curcuma longa L.) extract as a green corrosion inhibitor for 1018 carbon steel in 0.5 M H2SO4 solution has been evaluated by using weight loss tests, potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements. Results have shown that Curcuma longa L. decreased the weight loss by one and the corrosion current density values by two orders of magnitudes. Results of free energy suggest physical adsorption on to the steel surface obeying a Langmuir type of adsorption isotherm. Polarization studies give evidence that Curcuma longa L. extract behaves as a predominantly cathodic type of inhibitor, and its efficiency increases with increasing its concentration, reaching a maximum value of 90%.

引用

页码：5026 / 5041

页数：16

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