Piperazine derivatives as inhibitors of the corrosion of mild steel in 3.9 M HCl

被引：0
|
作者：
A. Ousslim
K. Bekkouch
B. Hammouti
A. Elidrissi
A. Aouniti
机构：
[1] Laboratoire de Chimie Solide Minérale,
[2] Faculté des Sciences,undefined
[3] Laboratoire de Chimie Appliquée & Environnement,undefined
[4] Faculté des Sciences,undefined
来源：
Journal of Applied Electrochemistry | 2009年 / 39卷
关键词：
Corrosion; Inhibition; Piperazine; Carbon steel;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The inhibitory action of two piperazine derivatives, 1-benzyl piperazine (P1) and bis(1-benzylpiperazine) thiuram disulfide (P2) on the corrosion of mild steel in 3.9 M HCl at different concentrations has been investigated in the temperature domain 298–333 K. Both weight loss measurements and potentiodynamic polarization methods showed that P2 was the best inhibitor and that its inhibition efficiency increased with concentration to a value >92% at 10−3 M. Potentiodynamic polarization studies clearly revealed that P2 acts as cathodic-type inhibitor. The activation energy for the corrosion rates was evaluated in the temperature range 298–333 K. Adsorption of P2 on the mild steel surface in 3.9 M HCl followed a Langmuir isotherm model. A physical adsorption phenomenon is proposed.
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页码：1075 / 1079
页数：4
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