Investigation of the inhibitive effect of substituted oxadiazoles on the corrosion of mild steel in HC1 medium

被引：147
作者：
Lagrenée, M
Mernari, B
Chaibi, N
Traisnel, M
Vezin, H
Bentiss, F
机构：
[1] ENSCL, CNRS, UPRESA 8012, Lab Cristallochim & Physicochim Solide, F-59652 Villeneuve Dascq, France
[2] Univ Chouaib Doukkali, Fac Sci, Lab Chim Coordinat & Analyt, El Jadida, Morocco
[3] ENSCL, UPRES EA 2698, Lab Genie Proc Interact Fluides React Mat, F-59652 Villeneuve Dascq, France
[4] Lab Chim Organ & Macromol, CNRS, UPRESA 8009, F-59655 Villeneuve Dascq, France
来源：
CORROSION SCIENCE | 2001年 / 43卷 / 05期
关键词：
corrosion; mild steel; oxadiazole; hydrochloric acid; adsorption;
D O I：
10.1016/S0010-938X(00)00076-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of 2,5-bis(4-nitrophenyl)-1,3,4-oxadiazole (PNOX) and 2,5-bis(4-aminophenyl)-1,3,4-oxadiazole (PAOX) on the corrosion of mild steel in hydrochloric acid was studied in relation to the concentration of oxadiazoles using various electrochemical techniques and weight loss measurements. The results showed that PAOX inhibited the corrosion of mild steel in 1 M HCl whereas PNOX accelerated it. PAOX suppressed both cathodic and anodic processes of steel corrosion in 1 M HCl by its chemisorption on the surface via sharing electrons between nitrogen or oxygen and iron atoms. PAOX was adsorbed on the mild steel surface according to a Langmuir isotherm adsorption model. The electronic properties of PNOX and PAOX obtained by using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：951 / 962
页数：12
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