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材料工程  2009 

AZ31B镁合金表面锌系磷化膜制备工艺及性能研究

Keywords: 磷化,镁合金,防腐,反应机理

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Abstract:

采用极化曲线分析方法(Tafel)及扫描电子显微镜(SEM)对AZ31B镁合金在不同磷化时间及不同磷化温度条件下所形成的锌系磷化膜的防腐性能及表面微观形貌进行了研究,并应用X射线衍射仪(XRD)、能谱仪(EDS)对最佳工艺条件下所形成的磷化膜的相组成以及磷化膜的成分进行了研究。结果表明磷化时间及磷化温度对AZ31B镁合金磷化膜的防腐性能有较大影响,其最佳磷化时间为5min,最佳磷化温度为50℃;磷化膜的成分为Zn3(PO4)2·4H2O,Zn2Mg(PO4)2以及少量的单质Zn;在锌系磷化液中AZ31B镁合金中的Mg在微阳极发生溶解而Al没有溶解。此外还探讨了AZ31B镁合金表面的磷化反应机理。

References

[1]  LI G Y,LIAN J S,NIU L Y,et al.Growth of zinc phosphate coatings on AZ91D magnesium alloy[J].Surface and Coatings Technology,2006,201(3-4):1814-1820.
[2]  KOUISNI L,AZZI M,ZERTOUBI M,et al.Phosphate coatings on magnesium alloy AM60 part 1:study of the formation and the growth of zinc phosphate films[J].Surface and Coatings Technology,2004,185(1):58-67.
[3]  NIU Li-yuan,LI Guang-yu,JIANG Zhong-hao,et al.Influence of sodium metanitrobenzene sulphonate on structures and surface morphologies of phosphate coating on AZ91D[J].Transactions of Nonferrous Metals Society of China,2006,16(3):567-571.
[4]  NIU L Y,JIANG Z H,LI G Y,et al.A study and application of zinc phosphate coating on AZ91D magnesium alloy[J].Surface and Coatings Technology,2006,200(9):3021-3026.
[5]  CHENG Ying-liang,WU Hai-lan,CHEN Zhen-hua,et al.Phosphating process of AZ31 magnesium alloy and corrosion resistance of coatings[J].Transactions of Nonferrous Metals Society of China,2006,16(5):1086-1091.
[6]  SATHIYANARAYANAN S,SYED AZIM S,VENKATACHARIG.Corrosion resistant properties of polyaniline-acrylic coating on magnesium alloy[J].Applied Surface Science,2006,253 (4):2113-2117.
[7]  JEGANNATHAN S,SANKARA NARAYANAN T S N,RAVICHANDRAN K,et al.Performance of zinc phosphate coatings obtained by cathodic electrochemical treatment in accelerated corrosion tests[J].Electrochimica Acta,2005,51(2):247-256.
[8]  KWO ZONG CHONG,TENG SHIH SHIH.Conversion-coating treatment for magnesium alloys by a permanganate-phosphate solution[J].Materials Chemistry and Physics,2003,80(1):191-200.
[9]  ZHOU Wan-qiu,SHAN Da-yong,HAN En-hou.Structure and formation mechanism of phosphate conversion coating on die-cast AZ91D magnesium alloy[J].Corrosion Science,2008,50(2):329-337.

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