【摘 要】
：
A newly developed low-alloy weathering steel has been exposed in two coastal sites (Qingdao in the north,Wanning in the south) in China for one year.The samples
【机 构】
：
School of Materials Seience and Engineering
【基金项目】
：
国家重点基础研究发展规划(973计划)
论文部分内容阅读
A newly developed low-alloy weathering steel has been exposed in two coastal sites (Qingdao in the north,Wanning in the south) in China for one year.The samples in Wanning corroded far more seriously than those in Qingdao.The rust layer formed on the steel was analyzed by X-ray diffraction (XRD),scanning electron microscopy (SEM),N2 adsorption approach,polarization curves,and electrochemical impedance spectroscopy (EIS).The rust formed in Qingdao contains more X-ray amorphous compounds and is more compact than that formed in Wanning.Cr and Cu are enriched in the rust layer near the steel matrix,and the phenome-non is more obvious in Qingdao than in Wanning.The rust layer formed in Qingdao suppresses the anodic and cathodic reaction more remarkably than that formed in Wanning does.The rust layer formed in Qingdao possesses a higher ability to block the per-meation of chloride ions than that formed in Wanning does.
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