中文摘要：

用扫描电镜（SEM）观察Fe—B—Al合金基体和腐蚀界面的显微组织，用能谱仪（EDS）分析各相的化学成分，用失重法测定合金的腐蚀速率，研究了铝含量对硼铁耐液锌腐蚀性能的影响，并用显微压痕法评定了耐蚀性较好的合金的力学性能。试验结果表明，硼铁中铝含量大于18％时，主要形成与锌液不湿润的Fe-Al金属间化合物，具有很好的耐液锌腐蚀性；少量的B富集于晶界，起净化晶界作用，提高了硼铁材料的韧性。Fe24Al-4．2B和Fe-27Al-2．8B合金在锌液中既具有良好的耐蚀性，又具有较好的韧性，在镀锌工业中具有实际应用价值。

英文摘要：

Effect of Al content on corrosion resistance of iron-boron alloys substrate in zinc-liquid was investigated. The scanning electron microscopy （SEM） was used to analyze the microstructures of interface between alloy substrate and corrosion spots,and the energy dispersive X-ray spectroscopy （EDS） was used to analyze the chemical composition of the phases involved in Fe-B-Al alloys. A test of examination of mechanical properties and corrosion rate of the alloys was also carried out by use of the micro-indentation method and weight-loss method respectively. The results show that the Al content is more than 18wt% in iron-boron alloys,the intermetallic Fe-Al are formed mostly, which are no wettable in the zinc-liquid,and their corrosion resistance to zinc liquid is enhanced correspondently. Meanwhile, the segregation of B at grains boundary playing as cleaner role is beneficial to improve the toughness of iron-boron alloy. The Fe-24Al-4. 2B and Fe-27Al-2. 8B alloys both with the excellent corrosion resistance to zinc-liquid and good toughness can be used prolongedly in zinc-plating industry.