Corrosion inhibition of copper in chloride solutions by pyrazole

被引：115
|
作者：
Geler, E [1 ]
Azambuja, DS [1 ]
机构：
[1] Univ Fed Rio Grande Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil
来源：
CORROSION SCIENCE | 2000年 / 42卷 / 04期
关键词：
copper; polarization; acid inhibition;
D O I：
10.1016/S0010-938X(99)00080-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion inhibition of copper in 0.1 M HCl in the presence of pyrazole was studied using potentiodynamic techniques with rotating disc and rotating ring disc electrode (RRDE). It was observed that the presence of pyrazole changes the mechanism of Cu dissolution in 0.1 M HCl. RRDE measurements showed that Cu+ was detected in the a;hole potential range studied, while Cu+2 was formed only at high anodic overpotentials. The addition of pyrazole decreases the rate of cuprous species formed and increases that of cupric species. Pyrazole behaves like a cathodic inhibitor and the inhibition efficiency is influenced by mass transport. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：631 / 643
页数：13
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