锌液对Fe-Al-B合金的腐蚀行为

Corrosion Behavior of Fe-Al-B Alloy in Molten Zinc

针对当前热镀锌行业亟待解决的液态锌腐蚀问题，研究了新型耐熔锌腐蚀整体材料Fe-Al-B合金在液态锌中的腐蚀行为，利用扫描电子显微镜（SEM）观察了腐蚀界面，并对腐蚀产物进行了能谱分析，初步探讨了Fe-Al-B合金在锌液中的腐蚀机制。结果表明，合金在锌液中的腐蚀是一个反应扩散和溶解的过程，开始时锌原子扩散很快．经过一段时间，在基体与锌液之间形成过渡层，扩散速度将大大减慢。加入Ti元素细化晶粒的Fe-Al-B合金．以其独特的耐液态锌腐蚀的网格状Fe-B共晶组织，阻碍了锌原子在合金基体中的扩散，使合金具有良好的耐蚀性能。

This paper,which is aimed at the corrosion problem of molten zinc demanding prompt solution in galvanizing industry,studies corrosion behavior of the new style integrated material Fe-Al-B alloy with corrosion resistance to molten zinc. Corrosion interface is observed through scan electron microscope （SEM）, and corrosion result is analyzed by the energy spectrum, and the paper probes into the corrosion mechanism of Fe-Al-B alloy in molten zinc tentatively. The result indicates that the corrosion of the alloy in molten zinc is a process of reaction diffusion and solution in molten zinc essentially. The diffusion of zinc atom is very quick at beginning,but after a short time,transition zone is formed,the speed of diffusion of zinc atom will slow down greatly. Fe-Al-B alloy of adding Ti element to thin crystalline grain, which is unique latticed Fe-B eutectic structure with corrosion resistance to molten zinc, hinders the diffusion of zinc atom in the alloy base body, and has good corrosion resistance to molten zinc.