Characterization of Rust Layer Formed on Low Alloy Steel Exposed in Marine Atmosphere

被引：0
|
作者：
QuanchengZHANG
JianshengWU
WenlongZHENG
JianjunWANG
JiaguangCHEN
XiaofangYANG
AibaiLi
机构：
来源：
Journal of Materials Science & Technology | 2002年 / 05期
关键词：
Corrosion; Marine atmosphere; Low alloy steel; Iron oxyhydroxide;
D O I：
暂无
中图分类号：
TG172 [各种类型的金属腐蚀];
学科分类号：
摘要：
The iron rust phases formed on low alloy steels containing different quantities of Cr element have been characterized using EPMA, Raman spectroscopy, TEM, optical microscopy etc. The ion selective properties of synthesized rust films with the same phase constituent as the atmospheric corrosion products were investigated using self-made apparatus. The results showed that corrosion loss of steels exposed in marine atmosphere decreased rapidly as the Cr content of the steel was increased. Cr-containing steels were covered by a uniform compacted rust layer composed of fine particles with an average diameter of several nanometers. Inner rust layer of Cr-containing steel （2 mass fraction） was composed of a-CrxFe1;OOH, with Cr content of about 5 mass fraction. Such rust layer showed cation selective property, and could depress the penetration of Cl- to contact substrate steel directly.
引用
收藏
页码：455 / 458
页数：4
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