超声处理对可降解Zn-0.5Sr合金组织及腐蚀性能的影响  

Effect of ultrasonic treatment on microstructure and properties of degradable Zn-0.5Sr alloy

作　　者：刘建军[1] 张朋涛 赵志鑫 张蛟 李庆林[1] 丁雨田[1] LIU Jian-jun;ZHANG Peng-tao;ZHAO Zhi-xin;ZHANG Jiao;LI Qing-lin;DING Yu-tian(School of Materials Science and Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2024年第1期1-9,共9页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(23JRRA752)。

摘　　要：以Zn-0.5Sr合金为对象,研究了不同超声功率(0、300、600、900 W)对Zn-0.5Sr合金显微组织及腐蚀性能的影响.结果表明:Zn-0.5Sr合金经过超声处理后,铸态组织中SrZn13相由粗大的多边形转变为细小的块状,与未处理的合金相比较,对合金进行600 W超声处理后,合金的电化学腐蚀速率由2.078±0.141 mm/a增加至5.747±0.390 mm/a.当超声功率为600 W时,Zn-0.5Sr合金15、30 d的浸泡腐蚀速度分别为0.090±0.0021、0.074±0.0019 mm/a,是未经超声处理的1.88、1.95倍.The effects of different ultrasonic power(0,300,600,900 W)on the microstructure and corrosion properties of Zn-0.5Sr alloy were studied.The results show that the SrZn 13 phase in the as-cast Zn-0.5Sr alloy changes from coarse polygon to fine block after ultrasonic treatment.Compared with the untreated alloy,the electrochemical corrosion rate of the alloy increases from 2.078±0.141 mm/a to 5.747±0.390 mm/a when the ultrasonic power is 600 W.The immersion corrosion rates of Zn-0.5Sr alloy after 15 and 30 days are 0.090±0.0021、0.074±0.0019 mm/a,respectively,which are 1.88 times and 1.95 times higher than that of the untreated alloy.

关 键 词：Zn-0.5Sr合金 微观组织 超声处理 腐蚀速度 

分 类 号：TG146.1[一般工业技术—材料科学与工程]