铁锰二元合金耐液锌腐蚀机理  

Corrosion mechanism of Fe-Mn alloy in molten zinc

作　　者：张艺[1] 刘俊友[1] 吴春京[1] 田光新[1] 刘杰[2] 

机构地区：[1]北京科技大学材料学系,北京100083 [2]北京北科德瑞冶金工程技术有限公司,北京100083

出　　处：《材料热处理学报》2010年第1期121-125,共5页Transactions of Materials and Heat Treatment

基　　金："耐液态铝锌硅高温腐蚀的新合金材料"中小企业创新基金项目(07KW1003)

摘　　要：研究了四种不同Mn含量的铁锰二元合金在450℃液锌中的腐蚀行为,探讨了Mn对铁锌反应的影响规律。结果表明,铁锰二元合金在液锌中的腐蚀属于溶解性腐蚀。随着锰含量的增加,腐蚀速率有较大变化。含锰量为10wt%的合金,其腐蚀速率为5.79×10-3g.cm-2.h-1,含锰量为15wt%的合金,其腐蚀速率为3.64×10-2.gcm-2.h-1。锰含量为10wt%时,腐蚀产物由致密的δ相层和块状的ζ相层组成,致密的较厚的δ相层的存在,降低了铁锌反应速率,合金表现出较好的耐液锌腐蚀能力,而锰含量为15wt%时,腐蚀产物由大量疏松的颗粒状ζ相分布在液锌相中组成,疏松的组织恶化了合金的耐液锌腐蚀能力。The corrosion behaviors of Fe-Mn binary alloys with different content of manganese in molten zinc were studied in order to better understand manganese element how affected the formation and growth of Fe-Zn phases.Experiment results show that the corrosion mechanism of Fe-Mn binary alloys in molten zinc is dissolution.The alloy with manganese content of 10wt%,shows better corrosion resistance in molten zinc compared with the other Fe-Mn binary alloys.The average corrosion rate of the Fe-10Mn alloy is 5.79×10^-3 g/（cm^2·h） and the corrosion products consist of compact δ phase layer and ζ phase layer,which can slowdown the reactions of Fe and Zn.When the manganese content up to 15wt%,the Fe-Mn alloy exhibits the worst corrosion resistance.The average corrosion rate of the Fe-15Mn alloy is 3.64×10~^-2g/（cm^2·h）,and the corrosion products exhibit a loose corrosion layer composed of small ζ particles distributed in molten zinc,causing deterioration of the corrosion resistance.

关 键 词：腐蚀机理 FE-MN合金 液锌 

分 类 号：TG174[金属学及工艺—金属表面处理] TG142.33[金属学及工艺—金属学]