为了提高生物医用可降解锌合金的力学性能，同时符合植入人体后的腐蚀速率需求，本文研究了在超声功率为 600 W 时，不同超声处理时间 (0 、 2 、 5 、 8 min) 对 Zn-0.5Sr 合金微观组织及性能的影响。研究结果表明，当超声时间为5 min 时， 初生 α-Zn 和 SrZn 13 第二相尺寸减小到 87.24 和 35.01 μm ， 合金的抗拉强度和延伸率提高到 118.93 MPa 和1.32% 。 15 天浸泡腐蚀实验结果表明，未经超声处理的合金腐蚀速率最低，为 0.046 mm/a ，当超声时间达到 5 min 时，合金的腐蚀速率提高到 (0.085±0.003 1) mm/a 。 电化学实验结果表明， 超声时间为 5 min 的 Zn-0.5Sr 合金腐蚀速度由(2.340±0.159) mm/a 增加到 (5.207±0.354) mm/a 。

To enhance the mechanical properties of biodegradable Zn alloys used in biological medical applications and simultaneously ensure that the corrosion rate meets the requirements for implantation in the human body, the impact of varying ultrasonic treatment time (0, 2, 5 and 8 min) on the microstructure and properties of Zn-0.5Sr alloys was investigated at a constant ultrasonic power of 600 W. The results reveal that reducing the ultrasonic time to 5 min results in a decrease in the size of the primary α-Zn and SrZn 13 second phase to 87.24 and 35.01 μm, respectively. Additionally, the tensile strength of the alloy increases to 118.93 MPa, and the elongation increases to 1.32% . The results of 15-day immersion corrosion experiments show that the corrosion rate of the alloy without ultrasonic treatment has the lowest value of 0.046 mm/a, and when the ultrasonic time reaches 5 min, the corrosion rate of the alloy increases to (0.085±0.003 1) mm/a. The electrochemical experimental results show that the corrosion rate of the Zn-0.5Sr alloy after an ultrasonic treatment time of 5 min increases from (2.340±0.159) mm/a to (5.207±0.354) mm/a.