Inhibitive effect of sodium eperuate on zinc corrosion in alkaline solutions

被引：42
|
作者：
Li, M. C. [1 ,2 ]
Royer, M. [1 ]
Stien, D. [1 ]
Lecante, A. [3 ]
Roos, C. [3 ]
机构：
[1] UMR ECOFOG, CNRS, F-97337 Cayenne, French Guiana
[2] Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China
[3] Univ Antilles Guyane, CNRS, UMR ECOFOG, F-97337 Cayenne, French Guiana
来源：
CORROSION SCIENCE | 2008年 / 50卷 / 07期
关键词：
zinc; concrete; EIS; alkaline corrosion; passivity;
D O I：
10.1016/j.corsci.2008.04.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of sodium eperuate prepared from Wallaba (Eperua falcata Aubl) extract on zinc corrosion was investigated in alkaline solutions with chloride ions (i.e., simulated concrete pore solutions) by using electrochemical techniques. Sodium eperuate inhibits the corrosion of zinc in 0.1 M NaCl solutions with pH 9.6. As its concentration increases to 1 g/L, the inhibition efficiency reaches approximately 92%. In alkaline solutions with pH 12.6, sodium eperuate has no adverse effect on passivity of zinc, and retards the chloride attack. These suggest that sodium eperuate is an effective inhibitor for the protection of zinc in alkaline environments. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1975 / 1981
页数：7
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