(1. 南京工程學(xué)院 材料工程學(xué)院，南京 211167；
2. 上海交通大學(xué) 輕合金精密成型國家工程研究中心，上海 200240)
摘 要: 對(duì)鑄態(tài)(F)Mg-3.08Nd-0.27Zn-0.43Zr(質(zhì)量分?jǐn)?shù)，%) 鎂合金進(jìn)行了固溶處理(T4)及固溶+人工時(shí)效(T6)。采用光學(xué)顯微鏡研究了F、T4、T6狀態(tài)下Mg-3.08Nd-0.27Zn-0.43Zr合金的顯微組織，采用析氫和失重實(shí)驗(yàn)測(cè)試合金在模擬體液中的生物腐蝕性能，并且利用掃描電子顯微鏡觀察了腐蝕后合金的表面腐蝕形貌，采用電化學(xué)法測(cè)試了合金在模擬體液中的循環(huán)極化曲線。結(jié)果表明：固溶處理及固溶+人工時(shí)效處理均有助于提高合金在模擬體液中的生物腐蝕性能，且Mg-3.08Nd-0.27Zn-0.43Zr合金在模擬體液中的腐蝕方式為均勻腐蝕。
關(guān)鍵字: 生物鎂合金；模擬體液；生物腐蝕性能；均勻腐蝕
（1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China;
2. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong Univ）
Abstract:The as-cast Mg-3.08Nd-0.27Zn-0.43Zr (mass fraction, %) magnesium alloy (F) was solution treated (T4) and solution treated+aged (T6). The microstructures of the alloy under F, T4 and T6 conditions were observed by optical microscope. The biocorrosion properties of the alloy in simulated body fluid (SBF) were evaluated using hydrogen evolution and mass loss experiments. The corrosion morphologies of the alloy after corrosion were observed by scanning electron microscopy. The cyclic polarization curves of the alloy in SBF were conducted by electrochemical method. The results show that both solution treatment and solution treatment+aging treatment can improve biocorrosion properties of the alloy in SBF. Moreover, the corrosion mode of the Mg-3.08Nd-0.27Zn-0.43Zr alloy in SBF is uniform corrosion.
Key words: biodegradable magnesium alloy; simulated body fluid; biocorrosion properties; uniform corrosion
