Corrosion protection of AA 2024-T3 by bis-[3-(triethoxysilyl)propyl]tetrasulfide in sodium chloride solution. Part 2: mechanism for corrosion protection

被引：424

作者：

Zhu, DQ ^{[1
]}

van Ooij, WJ ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Mat Sci & Engn, Cincinnati, OH 45221 USA

来源：

CORROSION SCIENCE | 2003年 / 45卷 / 10期

关键词：

AA; 2024-T3; EIS; SEM; passive films; polymer coatings;

D O I：

10.1016/S0010-938X(03)00061-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion protection of AA 2024-T3 by films of bis-[3-(triethoxysilyl)propyl]tetrasulfide (bis-sulfur silane) was studied in a neutral 0.6 M NaCl solution using potential transient, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results showed that a highly crosslinked or dense interfacial layer that developed between the silane film and the aluminum oxide is the major contribution to the corrosion protection of AA 2024-T3. The formation of this interfacial layer heavily restricts pit growth underneath via retarding the transport of corrosion products, as well as effectively blocks a number of cathodic sites available for cathodic reactions. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2177 / 2197

页数：21

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