ZA27/SiC_p复合材料在氯化钠溶液中浸泡30 d,通入氧气,研究腐蚀对其表观和显微组织的影响。通过复合铸造制备不同SiC粒子含量的复合材料。采用光学显微镜和扫描电子显微镜研究材料的显微组织,结果表明复合材料基体发生了腐蚀,且优先发生在富锌η相。腐蚀过程不影响嵌入基体合金中的SiC粒子。电化学极化测试表明,复合材料中SiC粒子含量的增加,导致复合材料的耐腐蚀性降低。 ZA27 / SiC_p composites were soaked in sodium chloride solution for 30 days, and oxygen was introduced into them to study the effects of corrosion on their apparent and microstructure. Composites with different content of SiC particles were prepared by compound casting. The optical microscopy and scanning electron microscopy were used to study the microstructure of the material. The results showed that the composite matrix corroded, and preferentially occurred in the zinc-rich η phase. The etching process does not affect the SiC particles embedded in the matrix alloy. Electrochemical polarization test showed that the increase of the content of SiC particles in the composite resulted in the decrease of the corrosion resistance of the composite.