Promoting effect of low concentration of benzotriazole on the corrosion of Cu10Ni alloy in sulfide polluted salt water

被引：19

作者：

Allam, Nageh K. ^{[1
,2
]}

Ashour, Elsayed A. ^{[2
]}

机构：

[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[2] Natl Res Ctr, Dept Phys Chem, Electrochem & Corros Lab, Cairo 12622, Egypt

来源：

APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 16期

关键词：

copper-nickel; alloy; Seawater; benzotriazole; inhibitor; promoter; sulfide pollution;

D O I：

10.1016/j.apsusc.2008.01.165

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 interaction of benzotriazole (BTAH) with the surface of a corroding copper-nickel alloy in a sulfide polluted salt solution reveals a change in its role from an inhibitor to a promoter of localized corrosion as its concentration changes. A concentration of BTAH >= 5 x 10(-4) M inhibits the corrosion reaction in both the polluted and the unpolluted media. On the other hand, a concentration of 10(-4) M BTAH promotes the localized corrosion of the alloy in the polluted medium while it acts as an inhibitor in the unpolluted salt solution. This finding is substantiated by measurements of mass loss and current transients and examination of the surface by SEM microscopy. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：5007 / 5011

页数：5