Influence of Thickness of Micro-arc Oxidation Coatings on Corrosion Resistance of AZ91D Magnesium Alloy
摘 要
采用扫描电镜观察了AZ91D镁合金上不同厚度微弧氧化膜的形貌,通过中性盐雾试验和电化学阻抗谱,对不同厚度微弧氧化膜的耐蚀性进行了研究.结果表明:随着微弧氧化膜层厚度增加,膜层表面致密度降低,膜层质量变差;膜层的耐蚀性不是随膜层厚度的增加而单调提高的;一定工艺参数下,存在耐蚀性最佳的微弧氧化膜厚,它是由膜层的有效厚度即致密层厚度决定的,而与膜层的总厚度关系不大;在当前工艺条件下,相对于6 μm、10 μm、20 μm厚度的膜层,15 μm厚度的膜层试件耐蚀性最佳.
Abstract
The morphology of micro-arc oxidation coatings on AZ91D magnesium alloy was observed by scanning electron microscopy.The corrosion resistance of the coatings with different thicknesses was examined by neutral salt spray testing and electrochemical impendence spectroscopy.The results show that the compactness of the coatings declined and their quality degraded with the increase of coating thickness.The coating corrosion resistance did not increase monotonously with the coating thickness.With given technical parameters,there was a micro-arc oxidation coating with the best corrosion resistance.The best thickness was dependent on the effective thickness of the coating instead of its total thickness.In this study the corrosion resistance for the specimen with thickness of 15 μm was better than that of 6 μm,10 μm,20 μm.
中图分类号 TG146.2 TG174.3
所属栏目 试验研究
基金项目
收稿日期 2009/2/13
修改稿日期 2009/3/12
网络出版日期
作者单位点击查看
备注张勇,助教.
引用该论文: ZHANG Yong,CHEN Yue-liang,YU Da-zhao,ZHANG Tai-feng,ZHU Wu-feng. Influence of Thickness of Micro-arc Oxidation Coatings on Corrosion Resistance of AZ91D Magnesium Alloy[J]. Corrosion & Protection, 2010, 31(2): 131~134
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】李荣华,黄继华,殷声.镁基复合材料研究现状与展望[J].材料导报,2002,16(8):17-19.
【2】吉泽升,辛明德,梁维中,等.压铸镁铝合金的研究现状及应用背景[J].新材料产业,2003,7:19-22.
【3】Mordike B L,Ebert T.Magnesium properties-applications-potential[J].Materials Science and Engineering,2001,A302:37-45.
【4】郝建民,陈宏,张荣军,等.镁合金微弧氧化陶瓷层的耐蚀性[J].中国有色金属学报,2003(4):988-991.
【5】A L Yerokhin,A A Voevodin,V V Lyubimov,et al.Plasma electrolytic fabrication of oxide ceramic surface layers for tri-biotechnical purposes on aluminium alloys[J].Surface and Coatings Technology,1998(110):140-146.
【6】王燕华.镁合金微弧氧化膜的形成过程及腐蚀行为研究[D].学位论文,青岛:中国科学院海洋研究所,2005.
【7】Goeminne G,Terryn H,Vereecken J.Characterisation of conversion layers on aluminium by means of electrochemical impedance spectroscopy[J].Electrochimica Acta,1995,40(4):479-486.
【8】Schram T,Goeminne G,Terryn H,et al.Study of the composition of zirconium based chromium free conversion layers on aluminium[J].Transactions of the Institute of Metal Finishing,1995,73(3):91-95.
【9】蒋百灵,夏天,时惠英,等.镁合金微弧氧化陶瓷层的绝缘强度及耐蚀性研究[J].材料热处理学报,2005(2):82-85.
【10】蒋百灵,张先锋.镁合金微弧氧化陶瓷层的生长过程及其耐蚀性[J].中国腐蚀与防护学报,2005(2):97-101.
【2】吉泽升,辛明德,梁维中,等.压铸镁铝合金的研究现状及应用背景[J].新材料产业,2003,7:19-22.
【3】Mordike B L,Ebert T.Magnesium properties-applications-potential[J].Materials Science and Engineering,2001,A302:37-45.
【4】郝建民,陈宏,张荣军,等.镁合金微弧氧化陶瓷层的耐蚀性[J].中国有色金属学报,2003(4):988-991.
【5】A L Yerokhin,A A Voevodin,V V Lyubimov,et al.Plasma electrolytic fabrication of oxide ceramic surface layers for tri-biotechnical purposes on aluminium alloys[J].Surface and Coatings Technology,1998(110):140-146.
【6】王燕华.镁合金微弧氧化膜的形成过程及腐蚀行为研究[D].学位论文,青岛:中国科学院海洋研究所,2005.
【7】Goeminne G,Terryn H,Vereecken J.Characterisation of conversion layers on aluminium by means of electrochemical impedance spectroscopy[J].Electrochimica Acta,1995,40(4):479-486.
【8】Schram T,Goeminne G,Terryn H,et al.Study of the composition of zirconium based chromium free conversion layers on aluminium[J].Transactions of the Institute of Metal Finishing,1995,73(3):91-95.
【9】蒋百灵,夏天,时惠英,等.镁合金微弧氧化陶瓷层的绝缘强度及耐蚀性研究[J].材料热处理学报,2005(2):82-85.
【10】蒋百灵,张先锋.镁合金微弧氧化陶瓷层的生长过程及其耐蚀性[J].中国腐蚀与防护学报,2005(2):97-101.
相关信息