摘要
采用扫描电镜(SEM)以及光学显微镜(OM)观察了Mg-1Zn-0.3Zr-2Gd-0.3Sr合金的微观组织。用X射线衍射仪(XRD)分析了合金的偏析相,并用浸泡测试和电化学试验研究了合金的腐蚀性能。结果表明:铸态合金的偏析相最多,平均腐蚀速率为1.102 mm/a;随着固溶温度的升高,合金的偏析相逐渐减少,组织逐渐变得较为均匀,平均腐蚀速率基本逐渐降低;经510℃固溶处理的合金的平均腐蚀速率最小为0.63 mm/a,比铸态合金的平均腐蚀速率降低了42.8%。
Microstructure of Mg-1 Zn-0.3 Zr-2 Gd-0.3 Sr alloy was investigated by scanning electron microscopy(SEM) and optical microscope(OM), and the segregation phase of the alloy was analyzed by X-ray diffraction(XRD), and the corrosion properties of the alloy was studied by immersion test and electrochemical test. The results show that the segregation phase of the as-cast alloy is the most, and the average corrosion rate is 1.102 mm/a. With the increase of solution temperature, the amount of the segregation phase decreases gradually, the microstructure becomes more uniform, and the average corrosion rate decreases gradually. The minimum average corrosion rate of the alloy is 0.63 mm/a after solid solution at 510 ℃ for 10 h, which is 42.8% lower than that of the as-cast alloy.
作者
郑丽鸽
贺俊光
文九巴
徐大召
ZHENG Li-ge;HE Jun-guang;WEN Jiu-ba;XU Da-zhao(College of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals, Henan Province, Luoyang 471023 , China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第2期40-46,共7页
Transactions of Materials and Heat Treatment
基金
河南省自然科学基金项目(162300410213)
河南省教育厅科技攻关项目(14A430001)
关键词
固溶温度
微观组织
腐蚀性能
平均腐蚀速率
solid solution temperature
microstructure
corrosion properties
average corrosion rate
