摘要
为了平衡锌基合金的力学性能与降解速率,本工作设计熔铸了Zn-xCu-ySr(x=2,3,5;y=0.1,0.3)三元合金,研究不同Cu和Sr含量对铸态Zn-Cu-Sr合金组织及性能的影响。结果表明,Zn-xCu-ySr合金的微观组织包括锌基体、ε-CuZn_(5)和SrZn_(13)金属间化合物;当Cu和Sr元素含量分别为5.0%(质量分数,下同)和0.3%时,锌基合金的抗拉强度和硬度达到最大,分别为165.3 MPa和85.5HB;Zn-xCu-ySr合金的腐蚀方式基本为均匀腐蚀;当Cu和Sr元素含量分别为2.0%和0.1%时,合金的耐腐蚀性最好,其静态浸泡腐蚀速率最慢,约为0.044 mm/a,且其自腐蚀电流密度和电化学腐蚀速率也最小,分别为15.10μA/cm^(2)和0.078 mm/a。
In order to balance the mechanical properties and degradation rate of zinc-based alloys,the Zn-xCu-ySr(x=2,3,5;y=0.1,0.3)ternary alloy was designed and cast,and the effects of different Cu and Sr contents on the microstructure and properties of as-cast Zn-Cu-Sr alloy were investigated.The results showed that the microstructure of Zn-xCu-ySr alloy consisted of zinc matrix,ε-CuZn_(5)and SrZn_(13)intermetallic compounds.When the contents of Cu and Sr were 5.0wt%and 0.3wt%,the tensile strength and hardness of zinc-based alloy reached the highest,which were 165.3 MPa and 85.5HB,respectively.The corrosion mode of Zn-xCu-ySr alloy was uniform corrosion.When the contents of Cu and Sr were 2.0wt%and 0.1wt%,respectively,the corrosion resistance of Zn-2Cu-0.1Sr was the best,the corrosion rate in static immersion test was the slowest,which was about 0.044 mm/a.And the corrosion current density and corrosion rate in potentiodynamic polarization test(PDP)were the smallest,which were 15.10μA/cm^(2)and 0.078 mm/a,separately.
作者
曹晓君
刘美辰
杨康
马义明
王俊杰
黎军顽
CAO Xiaojun;LIU Meichen;YANG Kang;MA Yiming;WANG Junjie;LI Junwan(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;Xiangguan Alloy Research Institute,Suzhou 215400,Jiangsu,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第18期207-213,共7页
Materials Reports
关键词
可降解锌合金
微观结构
力学性能
耐蚀性能
degradable zinc alloy
microstructure
mechanical property
corrosion resistance
