Synthesis and comparative study of the inhibitive effect of some new triazole derivatives towards corrosion of mild steel in hydrochloric acid solution

被引：186

作者：

El Mehdi, B

Mernari, B

Traisnel, M

Bentiss, F

Lagrenée, M

机构：

[1] ENSCL, Lab Cristallochim & Physicochem Solide, CNRS, UPRESA 8012, F-59652 Villeneuve Dascq, France

[2] Univ Chouaib Doukkali, Lab Chim Coordinat & Analyt, Fac Sci, El Jadida, Morocco

[3] ENSCL, UPRES EA 2698, Lab Genie Procedes INteract Fluides Reactifs Mat, F-59652 Villeneuve Dascq, France

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 77卷 / 02期

关键词：

triazole; mild steel; hydrochloric acid; adsorption; electrochemical impedance; polarisation curves;

D O I：

10.1016/S0254-0584(02)00085-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The inhibition of the corrosion of mild steel in I M HCl by 3,5-di(m-tolyl)-4-amino-1,2,4-triazole (m-DTHT) and 3,5-di(m-tolyl)-4H-1,2,4-triazole (m-DTHT) has been investigated at 30 degreesC using electrochemical and weight loss measurements. Polarisation curves reveal that m-DTHT is a mixed type inhibitor whereas m-DTAT is a cathodic type inhibitor. Inhibition efficiencies up to 95% for m-DTAT and 91% for m-DTHT can be obtained. Adsorption of these inhibitors on the mild steel surface is found to obey the Langmuir adsorption isotherm. The effect of temperature on the corrosion behaviour with addition of 4 x 10(-4) M of m-DTAT and m-DTHT added was studied in the temperature range 30-60 degreesC. The associated activation corrosion and free adsorption energies have been determined. The comparative study of triazole derivatives indicates that the corrosion inhibition efficiency of the aminotriazole is greater than that of the 4H-triazole. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：489 / 496

页数：8

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