采用正交试验方法对镁合金硅酸盐体系的微弧氧化处理工艺进行优化,采用SEM、EDS、XPS和XRD对微弧氧化膜的微观成分与结构进行了表征,进而分析探讨了电解液成分及氧化参数对镁合金表面膜粘接性能的影响规律.研究结果表明,所研究的几种工艺参数对AZ31镁合金表面的粘接性能的影响程度从小到大排列为:KOH的浓度＜频率＜Na2B4O7的浓度＜占空比.微弧氧化处理后的镁合金试样在3.5％ NaCl溶液中的开路电位提高约200mV,其表面微弧氧化膜主要由MgO和MgSiO3组成.经优化工艺微弧氧化处理后,镁合金胶接件的拉剪强度可达约24MPa,比未氧化处理的提高近90％.氧化工艺参数对氧化膜成分的影响不大,主要影响膜层的表面形貌,进而影响镁合金粘接件的粘接强度.
参考文献
| [1] | Gray J E;Luan B .Protective coatings on magnesium and its alloys-A critical reviews[J].Journal of Alloys and Compounds,2002,336(1-2):88. |
| [2] | Fukuda H;Matsumoto Y .Effects of Na2SiO3 on anodization of Mg-Al-Zn alloy in 3 M KOH solution[J].Corrosion Science,2004,46(09):2135. |
| [3] | Barnes T A;Pashby I R .Joining techniques for aluminium space frames used in automobiles.Part Ⅱ.Adhesive bonding and mechanical fasteners[J].Journal of Materials Processing Technology,2000,99(1-3):72. |
| [4] | Critchlow G W;Yendall K A;Bahrani D et al.Strategiesfor the replacement of chromic acid anodising for the structural bonding of aluminium alloys[J].International Journal of Adhesion and Adhesives,2006,26(06):419. |
| [5] | Cai QZ;Wang LS;Wei BK;Liu QX .Electrochemical performance of microarc oxidation films formed on AZ91D magnesium alloy in silicate and phosphate electrolytes[J].Surface & Coatings Technology,2006(12/13):3727-3733. |
| [6] | Srinivasan, PB;Blawert, C;Dietzel, W .Effect of plasma electrolytic oxidation treatment on the corrosion and stress corrosion cracking behaviour of AM50 magnesium alloy[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2008(1/2):401-406. |
| [7] | Chang L M .Growth regularity of ceramic coating on magnesium alloy by plasma electrolytic oxidation[J].Journal of Alloys and Compounds,2009,468(1-2):462. |
| [8] | Jin F;Chu P K;Xu G D .Structure and mechanical properties of magnesium alloy treated by micro-arc discharge oxidation using direct current and high-frequency bipolar pulsing modes[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,435-436:123. |
| [9] | Zhanga RF;Shan DY;Chen RS;Han EH .Effects of electric parameters on properties of anodic coatings formed on magnesium alloys[J].Materials Chemistry and Physics,2008(2/3):356-363. |
| [10] | Lv G H;Chen H;Gu W C et al.Effects of current frequency on the structural characteristics and corrosion property of ceramic coatings formed on magnesium alloy by PEO technology[J].Journal of Materials Processing Technology,2008,208(1-3):9. |
| [11] | Packham D E .Surface energy,surface topography and adhesion[J].International Journal of Adhesion and Adhesives,2003,23(06):437. |
| [12] | Jiang ZX;Huang YD;Liu L;Long J .Effects of roughness on interfacial performances of silica glass and non-polar polyarylacetylene resin composites[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2007(24):9357-9364. |
| [13] | Critchlow G W;Brewis D M .Review of surface pretreatments for aluminium alloys[J].International Journal of Adhesion and Adhesives,1996,16(04):255. |
| [14] | 蒋百灵,吴国建,张淑芬,雷廷权.镁合金微弧氧化陶瓷层生长过程及微观结构的研究[J].材料热处理学报,2002(01):5-7. |
| [15] | 陈显明,罗承萍,刘江文,李文芳.镁合金微弧氧化膜层结构[J].中南大学学报（自然科学版）,2006(06):1065-1069. |
| [16] | 陈东初,李文芳,揭军,彭继华.AZ91D镁合金表面微弧氧化陶瓷膜微观结构与组成的研究[J].稀有金属材料与工程,2009(z2):731-734. |
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