2024铝合金表面陶瓷基氧化膜的制备及性能
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摘要
采用交流电源微弧氧化进行2024铝合金表面陶瓷基氧化膜的制备,研究了2024铝合金表面陶瓷基氧化膜的生长规律,各因素对膜层厚度和耐腐蚀性、表面及截面形貌特征、膜层微观结构及相成分的影响.结果表明,采用硅酸盐电解液体系,恒压模式下,电压为200V时,氧化膜厚度最大,表面微孔分布均匀、孔径较小,膜层耐蚀性最好;恒流模式下,电流密度在15A·dm-2时,膜层表面性能最好,具有较高耐蚀性,超过这一电流密度后膜层致密度明显下降.
The ceramic oxide film on 2024 aluminum alloy surface was prepared by AC power microarc oxidation.The growth law of ceramic based oxide film on aluminum alloy surface was studied systematically.The thickness,surface hardness,corrosion resistance and wear resistance of ceramic based oxide film on aluminum alloy surface were studied.The effect of surface and cross section morphology,microstructure and phase composition of the film were discussed.The results show that:using silicate electrolyte system,under constant voltage mode,when the voltage is 200 V,the thickness of oxide film is the largest,the surface pore distribution is uniform,and the pore size is small,the film has the best corrosion resistance;in constant current mode,when the current density is at 15 A·dm-2,the film has the best surface performance and high corrosion resistance;when the current density exceeds this current density,the density of the film decreases obviously.
The ceramic oxide film on 2024 aluminum alloy surface was prepared by AC power microarc oxidation.The growth law of ceramic based oxide film on aluminum alloy surface was studied systematically.The thickness,surface hardness,corrosion resistance and wear resistance of ceramic based oxide film on aluminum alloy surface were studied.The effect of surface and cross section morphology,microstructure and phase composition of the film were discussed.The results show that:using silicate electrolyte system,under constant voltage mode,when the voltage is 200 V,the thickness of oxide film is the largest,the surface pore distribution is uniform,and the pore size is small,the film has the best corrosion resistance;in constant current mode,when the current density is at 15 A·dm-2,the film has the best surface performance and high corrosion resistance;when the current density exceeds this current density,the density of the film decreases obviously.
引文
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[2]马国峰,鲁志颖,贺春林.时效处理对2024铝合金晶界特征分布及性能的影响[J].沈阳大学学报(自然科学版),2017,29(6):435-440.MA G F,LU Z Y,HE C L.Influence of aging treatment on grain boundary character distribution and properties of2024aluminum alloy[J].Journal of Shenyang University(Natural Science),2017,29(6):435-440.
[3]TIRINGER U,KOVAˇC J,MILOˇSEV I.Effects of mechanical and chemical pre-treatments on the morphology and composition of surfaces of aluminium alloys 7075-T6and 2024-T3[J].Corrosion Science,2017,119:46-59.
[4]NAEINI M F,SHARIAT M H,EIZADJOU M.On the chloride-induced pitting of ultra fine grains 5052aluminum alloy produced by accumulative roll bonding process[J].Journal of Alloys&Compounds,2011,509(14):4696-4700.
[5]MALAYOGLU U,TEKIN K C.An investigation into the mechanical and tribological properties of plasma electrolytic oxidation and hard-anodized coatings on 6082aluminum alloy[J].Materials Science&Engineering A,2011,528(24):7451-7460.
[6]XIANG N,SONG R G,ZHAO J,et al.Microstructure and mechanical properties of ceramic coatings formed on 6063aluminium alloy by micro-arc oxidation[J].Transactions of Nonferrous Metals Society of China,2015,25(10):3323-3328.
[7]QUINTERO D,GALVIS O,CALDERN J A,et al.Effect of electrochemical parameters on the formation of anodic films on commercially pure titanium by plasma electrolytic oxidation[J].Surface&Coatings Technology,2014,258:1223-1231.
[8]SHOKOUHFAR M,ALLAHKARAM S R.Formation mechanism and surface characterization of ceramic composite coatings on pure titanium prepared by micro arc oxidation in electrolytes containing nanoparticles[J].Surface&Coatings Technology,2016,291:396-405.
[9]WANG J H,DU M H,HAN F Z,et al.Effects of the ratio of anodic and cathodic currents on the characteristics of micro-arc oxidation ceramic coatings on Al alloys[J].Applied Surface Science,2014,292:658-664.
[10]CEREZO J,VANDENDAEL I,POSNER R,et al.The effect of surface pre-conditioning treatments on the local composition of Zr-based conversion coatings formed on aluminium alloys[J].Applied Surface Science,2016,366:339-347.
[11]XIANG N,SONG R G,ZHUANG J J,et al.Effects of current density on microstructure and properties of plasma electrolytic oxidation ceramic coatings formed on 6063aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2016,26(3):806-813.
[12]HUANG H,WEI X,YANG J,et al.Influence of surface micro grooving pretreatment on MAO process of aluminum alloy[J].Applied Surface Science,2016,389:1175-1181.