摘要
通过对碳钢与耐候钢在海南、青岛两地挂片 4年的大气腐蚀速率测定 ,对挂片表面锈层结构的观察 ,以及对锈层的组成和合金元素分布的分析 ,结果表明 ,在海洋大气环境下 ,耐候钢相对于碳钢未表现出明显的抗大气腐蚀性能 ,耐候钢表面锈层由比较致密的片状内锈层和疏松外锈层组成 ,内锈层主要是α FeOOH ,外锈层是α FeOOH ,γ FeOOH ,Fe3 O4,碳钢表面锈层是由α FeOOH ,γ FeOOH ,Fe3 O4组成的疏松单层结构。在青岛挂片表面锈层中发现了Cl元素的均匀分布 ;在海南挂片锈层中含有S ,Cl,Cr等元素的局部富集 ,分析了S ,Cl,Cr三者在锈层中的作用。
Corrosion of carbon steel and weathering steel exposed for 3 years in Hainan and in Qingdao was compared. The rust layers formed on the weathering steel exposed to marine environments for 3 yeas have been characterized by means of IR absorption technique. The distribution of deferent components and alloy elements in the rust layer was determined. The inner rust layer formed on the weathering steel is mainly α FeOOH while the outer rust layers formed on weathering steel and whole rust layers formed on the carbon steel are α FeOOH,γ FeOOH,Fe 3O 4. Cr element is found in the inner rust layers formed on the weathering steel, and S, Cl elements are found in the outer rust layers and whole rust layers formed on the carbon steel. The functions of Cr , Cl and S in the rust layers have been analyzed.
出处
《腐蚀与防护》
CAS
2002年第7期288-291,共4页
Corrosion & Protection
关键词
海洋大气
腐蚀
表面镀层
耐候钢
碳钢
Marine environment
Atmospheric corrosion
Rust
Weathering steel
Carbon steel
