随着大跨径桥梁的发展和缆索强度的提高，对缆索热铸锚用锌合金的力学性能和耐腐蚀性能等提出了更高的需求，亟需开发适用的锌合金材料。 采用金属型重力铸造法制备了 Zn-xAl-1Cu(x=6、7、8、9, 质量分数，%)合金，通过光学显微镜、扫描电镜、拉伸测试、流动性测试和腐蚀失重试验等方法，研究了合金的显微组织、力学性能、流动性及耐腐蚀性能。 结果表明，合金的显微组织均由初生 α-Al 相和(α-Al+η-Zn)共晶相组成，随着 Al 含量的增加，α-Al 相数量明显增加，且分布更加均匀，合金的拉伸强度呈先增加后略有下降的趋势，而伸长率变化不大。 当 Al 含量为 8%时，合金的拉伸强度和伸长率达到最佳，分别为 258 MPa 和 1.83%。 此外，Al 含量增加有效提高了合金的耐腐蚀性能，但会降低流动性，Zn-9Al-1Cu 合金腐蚀速率为 0.103 g/(m2·h)，较 Zn-6Al-1Cu 合金降低了约 37%。

With the development of long-span bridges and the improvement in cable strength, higher requirements areplaced on the mechanical properties and corrosion resistance of zinc alloys for thermal castable cables. Therefore, thedevelopment of suitable zinc alloy materials is urgent. Zn-xAl-1Cu (x= 6, 7, 8 and 9, wt.%) was prepared by metal moldgravity casting. The microstructure, mechanical properties, fluidity and corrosion resistance of the alloy were studied bymeans of optical microscopy, scanning electron microscopy, tensile testing, fluidity testing and corrosion weight loss testing.The results show that the microstructure of the alloy is composed of a primary α-Al phase and an α-Al+η-Zn eutecticphase. With increasing Al content, the number of primary α-Al phases clearly increases, and the distribution is moreuniform. The tensile strength of the alloy first increases but then decreases slightly, but it has little effect on the elongationof the alloy. When the Al content is 8 wt.%, the tensile strength and elongation of the alloy are the greatest, whichare 258 MPa and 1.83% , respectively. In addition, an increase in the Al content effectively increases the corrosionresistance but reduces the fluidity of the alloy. The corrosion rate of the Zn-9Al-1Cu alloy is 0.103 g/(m2·h), which isapproximately 37% lower than that of the Zn-6Al-1Cu alloy.