李姝,董寅生,盛晓波,郭超,储成林.医用AZ31镁合金表面复合膜层的制备及其性能表征[J].表面技术,2010,39(1):41-44.
LI Shu,DONG Yin-sheng,SHENG Xiao-bo,GUO Chao,CHU Cheng-lin.Preparation and Characterization of a Composite Coating on AZ31 for Biomedical Application[J].Surface Technology,2010,39(1):41-44
医用AZ31镁合金表面复合膜层的制备及其性能表征
Preparation and Characterization of a Composite Coating on AZ31 for Biomedical Application
投稿时间:2009-10-23  修订日期:2010-02-10
DOI:
中文关键词:  医用镁合金  AZ31镁合金  复合膜层  阳极氧化  化学转化
英文关键词:Biomedical AZ31  Composite coating  Anodic oxidation  Chemical conversion
基金项目:2008年度江苏省高校科研成果产业化推进项目(JH-003)
作者单位
李姝 东南大学,南京211189 
董寅生 东南大学,南京211189 
盛晓波 东南大学,南京211189 
郭超 东南大学,南京211189 
储成林 东南大学,南京211189 
AuthorInstitution
LI Shu Southeast University, Nanjing 211189, China 
DONG Yin-sheng Southeast University, Nanjing 211189, China 
SHENG Xiao-bo Southeast University, Nanjing 211189, China 
GUO Chao Southeast University, Nanjing 211189, China 
CHU Cheng-lin Southeast University, Nanjing 211189, China 
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中文摘要:
      为改善医用AZ31镁合金的抗蚀性能,综合应用阳极氧化及化学转化工艺在其表面制备了复合膜层。通过扫描电镜观察了膜层形貌,X射线衍射分析了膜层成分,并利用电化学测试手段对膜层性能进行了表征。结果表明,阳极氧化工艺制备的膜层粗糙不平,主要组成为Mg(OH)2及Al2O3;经化学转化后,所得复合膜较为致密、平整,膜层中主要含元素N,O,P。动电位极化曲线分析表明,复合膜对AZ31镁合金具有显著的保护作用。EIS阻抗图谱拟合电路反映出制备的复合膜层具有4层结构,从侧面证明了阳极氧化膜与化学转化膜之间的化学结合作用。
英文摘要:
      In order to improve corrosion resistance of AZ31 magnesium alloy for biomedical application, a composite coating was prepared on AZ31 with the combination of applications of anodic oxidation and chemical conversion technology. The morphology of the coating was observed by SEM and its phases was analyzed by XRD while its property was characterized by electrochemical testing instrument. It is showed that the first coating prepared by anodic oxidation is rough and uneven observed, composed mainly by Mg(OH)2and Al2O3;After chemical conversion, the final composite coating is dense and even, showing proper contents of N, O, P. The potentiodynamic polarization curve demonstrates that the composite coating reduced corrosive rate of AZ31 magnesium alloy evidently. And the simulated circuit of the electrochemical impedance spectroscopy reveals the four-layer structure of the prepared composite coating, proving indirectly the chemical bonding between the anodic oxidized coating and the chemical conversion coating.
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