硅对铁基合金耐液锌腐蚀的影响  

Effect of Si on Corrosion Resistance of Iron-based Alloys in Molten Zinc

作　　者：张艺[1] 李洪波[1] 刘俊友[1] 

机构地区：[1]北京科技大学材料学院,北京100083

出　　处：《腐蚀与防护》2009年第10期704-707,共4页Corrosion & Protection

摘　　要：采用扫描电镜(SEM)和能谱(EDS)分析对含硅和不含硅的铁基合金在450℃液锌中的腐蚀行为进行了研究。结果表明:在浸锌时间不长的情况下,不含硅的铁基合金的耐锌蚀能力较好,随着浸锌时间的延长,含硅的铁基合金表现出较好的耐锌蚀能力,基体中Si的加入,界面处液相中Si富集,使得ζ相生长方式接近线性生长,导致腐蚀产物中的ζ相呈粗大的柱状,且腐蚀层中Г相消失,ζ相优先在Fe-Zn界面形成。Effect of Si on corrosion resistance of iron-based alloys in 450 ℃ molten zinc was investigated. The scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDS） were used to analyze the corrosion behavior of the iron-based alloys with and without Si in molten Zn. The results showed that the iron-base alloy without Si had better corrosion resistance at short time, but contrary at long time. There was a Si enrichment zone at the interface between alloy substrate and corrosion products, resulting in quick growth of the ξ phase with a coarse colummar shape.Г phase disappeared,ξ phase formed firstly at the interface of Fe-Zn.

关 键 词：腐蚀 金属间化合物 液锌 铁基合金 

分 类 号：TG172.6[金属学及工艺—金属表面处理]