A pyrazine derivative as corrosion inhibitor for steel in sulphuric acid solution

被引：74

作者：

Bouklah, M

Attayibat, A

Kertit, S

Ramdani, A

Hammouti, B ^{[1
]}

机构：

[1] Fac Sci, Lab Chim Eaux & Corros, Oujda, Morocco

[2] Fac Sci, Lab Chim Organ & Phys, Oujda, Morocco

[3] ENS Takoddoum, Lab Physicochim Mat, Rabat, Morocco

来源：

APPLIED SURFACE SCIENCE | 2005年 / 242卷 / 3-4期

关键词：

pyrazine; inhibition; corrosion; steel; acid;

D O I：

10.1016/j.apsusc.2004.09.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of diethyl pyrazine-2,3-dicarboxylate (P1) on the corrosion of steel in 0.5 M H2SO4 solution has been studied by weight loss measurements, potentiodynamic polarisation and linear polarisation resistance (Rp) and impedance spectroscopy (EIS) methods. The inhibiting action increases with the concentration of pyrazine compound to attain 82% at 10(-2) M. We note good agreement between gravimetric and electrochemical methods (potentiodynamic and Rp polarisation and electrochemical impedance spectroscopy (EIS)). Polarisation measurements also show that the pyrazine acts essentially as a cathodic inhibitor. The cathodic curves indicate that the reduction of proton at the steel surface happens with an activating mechanism. The yellow deposit on the steel surface was analysed by infrared method. P1 adsorbs on the steel surface according to Langmuir adsorption model. Effect of temperature is also made in the 298-353 K range. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：399 / 406

页数：8

共 20 条

[1] An electrochemical study of the action of a poly(vinylpyridine) derivative as inhibitor for corrosion of iron in 1M H2SO4 [J].