2/Mg2Zn11）和三元共晶（Zn/Al/Mg2Zn11）組成，而含有RE和Ti元素的合金中出現了新相(Ce1-xLax)Zn11和Al2Ti。電化學阻抗譜表明，相對于Zn-2.5Al-3Mg合金，Zn-2.5Al-3Mg-0.1RE-0.2Ti合金的耐蝕性得到了顯著的提高。XPS分析結果表明，RE元素的添加促進腐蝕產物Zn5(CO3)2(OH)6和MgAl2O4的形成，而RE和Ti元素的同時添加促進腐蝕產物 Zn5(CO3)2(OH)6、ZnAl2O4和MgAl2O4的形成，且都抑制了疏松多孔ZnO的生成。Zn5(CO3)2(OH)6、ZnAl2O4和MgAl2O4能夠很好地粘附在試樣表面，提供一層致密的保護層，從而提高Zn-2.5Al-3Mg合金的耐腐蝕性。;The effect of addition of RE and Ti on the microstructure and corrosion resistance of Zn-2.5Al-3Mg alloy were investigated by XRD, SEM, TEM and XPS. Results reveal that the microstructure of the Zn-2.5Al-3Mg alloy is composed of Zn-rich phase, binary eutectic (Zn-MgZn2/Mg2Zn11) and ternary eutectic (Zn/Al/Mg2Zn11). New phases of (Ce1?xLax)Zn11 and Al2Ti appear with the addition of RE and Ti elements. Electrochemical impedance spectroscopy indicates that the corrosion resistance of Zn-2.5Al-3Mg-0.1RE-0.2Ti alloy can be significantly improved compared to that of Zn-2.5Al-3Mg alloy. XPS analysis results show that the addition of RE element promotes the formation of Zn5(CO3)2(OH)6 and MgAl2O4 in the corrosion products, while the simultaneous addition of RE and Ti elements promotes the formation of corrosion products Zn5(CO3)2(OH)6, ZnAl2O4 and MgAl2O4, and inhibits the formation of loose porous ZnO. Zn5(CO3)2(OH)6, ZnAl2O4 and MgAl2O4 attach well to the surface of the sample, which provides a dense protective layer for the alloys, thus improving the corrosion resistance of Zn-2.5Al-3Mg alloy."/>