摘要
采用真空气氛保护金属型制备Mg-4Zn-1Ca三元合金,利用光学显微镜、扫描电子显微镜、浸泡腐蚀失重试验研究了铸态Mg-4Zn-1Ca合金在模拟体液中的腐蚀行为。结果表明,Mg-4Zn-1Ca合金的腐蚀速率随着时间的延长而降低,并观察到在60 min时氧化膜丧失保护能力。经过5 h浸泡后,铸态合金的平均腐蚀速率从最高的10.91 mm/a下降到了4.447 mm/a。
The Mg-4Zn-lCa ternary alloy ingot was prepared by permanent mold casting with vacuums protection atmosphere, The corrosion behavior of as-cast Mg-4Zn-lCa alloys in SBF solution （simulated body fluid） were investigated by optical microscopy, scanning electron microscopy, corrosion weight loss test and electrochemical experiments. The results show that the corrosion rate of Mg-4Zn-lCa alloys decreases with the increase of corrosion time; and the oxide film will lose protective capability after 60 min. The mean corrosion rate of as-cast Mg-4Zn-lCa alloy declines from 10.91 mrrga to 4.447 mm/a after immersion test for 5h.
出处
《铸造技术》
CAS
北大核心
2013年第9期1112-1114,共3页
Foundry Technology
基金
陕西省教育厅科学研究计划资助项目(12JK0448)
关键词
镁合金
晶界
腐蚀
magnesium alloy
grain boundary
corrosion
