Use of dicyclohexylamine nitrite in inhibition of coupled zinc and steel

被引：5
作者：
Khamis, E [1 ]
Oun, SR [1 ]
Lyon, SB [1 ]
机构：
[1] Univ Alexandria, Fac Sci, Dept Chem, Alexandria 21321, Egypt
来源：
BRITISH CORROSION JOURNAL | 2001年 / 36卷 / 03期
关键词：
Chelation - Electric impedance - Nitrogen compounds - Polarization - Steel - Zinc;
D O I：
10.1179/bcj.2001.36.3.197
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of dicyclohexylamine nitrite (DCHN), a volatile corrosion inhibitor, oil the corrosion behaviour of steel, zinc, and coupled steel and zinc was studied. Corrosion rates were determined using mass loss methods as well as potentiodynamic polarisation and ac impedance measurements. Potentiodynamic polarisation studies show that DCHN acts as ail anodic inhibitor in the corrosion of mild steel. However, for Zinc, DCHN acts to accelerate corrosion. This is attributed to surface chelation between DCHN and zinc, resulting in the formation of a soluble complex. Zero resistance ammetry was used to investigate the dissolution behaviour of a galvanic couple between steel and zinc in the presence of DCHN; in such as situation, the inhibitor effectiveness depends mainly on its concentration.
引用
收藏
页码：197 / 200
页数：4
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