采用光学显微镜及电化学腐蚀试验研究了Mg-4Zn-1Ca合金经不同固溶时间处理后的显微组织及腐蚀性能。研究表明,合金经固溶处理后,组织更加均匀,第二相逐渐溶解在基体内部,有效地减小了由于基体和第二相之间的电位差而引起的电化学腐蚀;Mg-4Zn-1Ca合金固溶处理时间为18 h时,开路电压为-1.4897 V,电流密度为0.047672m A/cm2,瞬时腐蚀速率为1.0531 mm/a,耐蚀性能最好。 The microstructure and corrosion properties of Mg-4Zn-1Ca alloy after different solution treatment time were studied by optical microscope and electrochemical corrosion test. The results show that after the solution treatment, the microstructure is more uniform and the second phase gradually dissolves inside the matrix, effectively reducing the electrochemical corrosion caused by the potential difference between the matrix and the second phase. The Mg-4Zn- When the solution treatment time is 18 h, the open circuit voltage is -1.4897 V, the current density is 0.047672 m A / cm2, and the instantaneous corrosion rate is 1.0531 mm / a. The corrosion resistance of 1Ca alloy is the best.