摘要
通过X射线衍射分析、电子探针和扫描电镜等手段对10PCuRE和10PCu耐候钢的表面锈层性能进行了研究,得到了10PCuRE钢致密锈层的种类、形成过程以及保护机理。通过对加稀土与未加稀土的耐候钢锈层的对比研究,可知稀土耐候钢的锈层分为两层,包括外锈层和均匀致密的内锈层,内锈层的组成相中超过80%为保护性的α-FeOOH。稀土促进了合金元素Cu在内锈层的富集,有利于保护性内锈层的生成,提高了钢基体的耐蚀性能。
The performance of rust layer of 10PCuRE. 10PCu weathering steels is studied by XRD, EPMA and SEM. The kind. forming process and protection mechanism of the corrosion products of 10PCuRE are obtained. Through the contrastive study of rust layer of rare earth weathering steel and weathering steel without rare earth,it is obtained the protective rust layer on 10CuPRE is divided into two layers including of outer rust layer and uniform compact inner rust layer. The 80% constituent phase of inner rust layer is steady α-FeOOH. The results indicate rare earth can promote alloying element Cu to enrich in the inner rust layer of 10PCuRE, the protective inner rust layer is easy to creating. So corrosion resistance of steel is improved.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2009年第3期74-77,81,共5页
Journal of Materials Engineering
关键词
稀土元素
耐候钢
锈层
耐蚀性
rare earth
weathering steel
rust layer
corrosion resistance
