Scanning electron microscopy, X-ray diffraction, a neutral salt spray test, and electrochemical methods were applied to observe the microstructure and test the corrosion resistance of hot-dip galvanized steel before and after the addition of La and Ce. La/Ce mixture existed in the form of (La, Ce)Zn₁₃ on the coated surface, decreased the coating thickness and accelerated the zinc dendritic growth. The corrosion current density of Zn–0.1La–0.1Ce coating was 63% less than that of pure Zn coating. This phenomenon can be explained that La/Ce mixture inhibited the transformation of Zn₅(OH)₈Cl₂·H₂O into Zn₅(CO₃)₂(OH)₆ or ZnO, reduced the time for appearance of red rust, and thus enhanced the stability of corrosion products and delayed the oxidation and corrosion processes of galvanized coating. La/Ce mixture improved the corrosion resistance compared to a single La or a single Ce addition. A competitive relationship between La and Ce was observed in the corrosion resistance improvement of hot-dip galvanized steel.

在加入La和Ce之前和之后，使用扫描电子显微镜，X射线衍射，中性盐雾试验和电化学方法观察热浸镀锌钢的显微组织并测试其耐腐蚀性。La / Ce混合物以（La，Ce）Zn ₁₃的形式存在于被覆表面上，降低了被覆层的厚度并促进了锌枝晶的生长。Zn–0.1La–0.1Ce涂层的腐蚀电流密度比纯Zn涂层低63％。这种现象可以解释为La / Ce混合物抑制了Zn ₅（OH）₈ Cl ₂ ·H ₂ O转化为Zn ₅（CO ₃）₂（OH）_6的转变。或ZnO，减少了出现红锈的时间，从而增强了腐蚀产物的稳定性，并延迟了镀锌涂层的氧化和腐蚀过程。与单一的La或单一的Ce添加相比，La / Ce混合物改善了耐腐蚀性。在热浸镀锌钢的耐蚀性改善中观察到La和Ce之间存在竞争关系。