摘要
研究了添加1%的Zn对均匀态Mg-4Sn合金微观组织及耐蚀性能的影响。利用OM、SEM、XRD、析氢失重试验以及极化曲线来分析两种合金的耐蚀性能。结果表明,Zn细化了Mg-4Sn合金的晶粒尺寸,由179.09μm减小到91.53μm,有颗粒状和长条状的Mg_(2)Sn相弥散分布于α-Mg基体中,Zn以固溶的方式存在于基体中。析氢失重测试结果表明,Zn提高了Mg-4Sn合金的耐蚀性能,这主要归因于Mg-4Sn-1Zn合金晶粒细小,并且Zn的添加使Mg_(2)Sn相分布更加均匀。极化曲线测得Mg-4Sn、Mg-4Sn-1Zn的自腐蚀电流密度分别为2.332×10^(-5)、3.848×10^(-6)μA/cm^(2)。因此,Mg-4Sn-1Zn合金的耐蚀性高于Mg-4Sn合金。
The influence of 1% Zn element on microstructure and corrosion resistance of homogenized Mg-4Sn alloy was investigated.The corrosion resistance of alloys was analyzed by OM,SEM,XRD,hydrogen loss experiment and polarization curve.The results indicate that the grain of Mg-4Sn alloy is refined by Zn addition,which is reduced from 179.09μm to 91.53μm.The granular and long striped Mg_(2)Sn phase is dispersedly distributed in α-Mg matrix,and Zn exists in the matrix as a solid solution.Hydrogen loss test results reveal that the corrosion resistance of Mg-4Sn is enhanced by Zn addition,which is mainly attributed to the fine grain of Mg-4Sn-1Zn alloy,leading to the evenly distribution of Mg_(2)Sn phase.Polarization curves demonstrate that the self-corroded current density of Mg-4Sn and Mg-4Sn-1Zn are 2.33×10^(-5)μA/cm^(2)and 3.848×10^(-6)μA/cm^(2),respectively,indicating the superior corrosion resistance of Mg-4Sn-1Zn alloy to that of Mg-4Sn.
作者
贾征
王芷茁
付丽
胡文义
胡文鑫
Jia Zheng;Wang Zhizhuo;Fu Li;HuWenyi;Hu Wenxin(College of Mechanical Engineering,Shenyang University;College of Chemistry and Materials,Longyan University;State Key Laboratory of Bayan Obo Rare Earth Resource Researches and Comprehensive Utilization)
出处
《特种铸造及有色合金》
CAS
北大核心
2023年第8期1025-1029,共5页
Special Casting & Nonferrous Alloys
基金
内蒙古自治区科技计划资助项目(2020GG0175)
包头稀土研究院开放基金资助项目(2021H2279)
辽宁省教育厅重点资助项目(LJKZ1171)
中国博士后基金资助项目(2020M680978)
辽宁省博士启动基金资助项目(2020-BS-260)
上杭奇迈基金资助项目(2020SHQM05)
福建省自然科学基金资助项目(2021J05232)。