New bipyrazole derivatives as effective inhibitors for the corrosion of mild steel in 1M HCl medium

被引：60
|
作者：
El Ouafi, A [1 ]
Hammouti, B
Oudda, H
Kertit, S
Touzani, R
Ramdani, A
机构：
[1] Fac Sci, Lab Chim Eaux & Corros, Oujda, Morocco
[2] Ecole Normale Super Takaddoum, Lab Physicochim Mat, AUPELF UREF LAF 509, Rabat, Morocco
[3] Fac Sci, LCOP, Oujda, Morocco
来源：
ANTI-CORROSION METHODS AND MATERIALS | 2002年 / 49卷 / 03期
关键词：
steel; acids; corrosion inhibitors;
D O I：
10.1108/00035590210426463
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The inhibition of the corrosion of the mild steel in 1 M HCl by new bipyrazolic compounds has been studied by weight loss, electrochemical polarisation and electrochemical impedance spectroscopy (EIS) measurements. Results obtained reveal that these compounds are very good inhibitors. The inhibition efficiency increases with the increase of inhibitor concentration and reached 94 at 10(-3) M for the bipyrazoles studied. Potentiodynamic polarisation studies clearly reveal that the presence of the bipyrazoles does not change the mechanism of the hydrogen evolution reaction and they act essentially as cathodic inhibitors, The effect of temperature on the corrosion behaviour of mild steel in 1M HCl without and with the bipyrazoles at 10(-3)M was studied in the temperature range from 298degrees to 343degreesK. EIS measurements show the increase of the transfer resistance with the inhibitor concentration.
引用
收藏
页码：199 / 204
页数：6
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