Corrosion inhibition of steel in 0.5 M H2SO4 by [(2-pyridin-4-ylethyl)thio] acetic acid

被引：62
作者：
Bouklah, M
Ouassini, A
Hammouti, B [1 ]
El Idrissi, A
机构：
[1] Fac Sci, Lab Chim Eaux & Corros, Oujda, Morocco
[2] Fac Sci, Lab Chim Organ Phys, Oujda, Morocco
来源：
APPLIED SURFACE SCIENCE | 2005年 / 250卷 / 1-4期
关键词：
steel; pyridine; inhibition; corrosion; acid; Langmuir;
D O I：
10.1016/j.apsusc.2004.12.021
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 [(2-pyridin-4-ylethyl)thio] acetic acid (PI) and pyridine (P2) on the corrosion inhibition of steel in sulphuric acid solution is studied using weight loss, potentiodynamic polarisation and linear polarisation resistance (R-p) and electrochemical impedance spectroscopy (EIS) measurements. Results obtained show that PI is the best inhibitor and its inhibition efficiency (E%) increases with the increase of concentration. The highest E% of 82% is observed at 5 x 10(-3) M. Potentiodynamic polarisation studies clearly reveal that PI acts as a mixed inhibitor. The inhibitor studied reduces the corrosion rates. E% values obtained from various methods used are in good agreement. Adsorption of P1 on steel surface obeys to Langmuir adsorption isotherm. Effect of temperature indicates that E% decreases with temperature between 298 and 353 K. (c) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：50 / 56
页数：7
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