AZ31镁合金阳极氧化-化学镀Ni-P涂层的微观组织
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摘要
采用OM和XRD研究了化学镀工艺对AZ31镁合金阳极氧化-化学镀Ni-P涂层微观组织的影响。结果表明:采用化学镀方法可在AZ31镁合金阳极氧化膜表面获得非晶态Ni-P涂层,且涂层与氧化膜界面结合良好;随着化学镀温度的升高或化学镀时间的延长,AZ31镁合金阳极氧化膜表面Ni-P涂层逐渐增多,当化学镀温度为90℃或化学镀时间为120 min时,Ni-P涂层完全覆盖氧化膜表面,此时涂层厚度分别达到8μm和10μm;随着镀液p H值的增加,镁合金表面氧化膜表面Ni-P涂层逐渐增多,p H值增加至10时,Ni-P涂层完全覆盖氧化膜表面,涂层厚度约11μm,继续增加p H值至10. 3时,Ni-P涂层沉积效果减弱。
The effects of electroless plating parameters on the microstructure of anodized-electroless Ni-P coating on the surface of AZ31 magnesium alloy were studied by means of optical microscopy and XRD.The results show that the amorphous Ni-P coating can be obtained on the surface of anodized AZ31 magnesium alloy by electroless plating,and the coating has good adhesion with anodized film.With increasing of temperature or time of electroless plating,Ni-P coating increases gradually.When electroless plating temperature is 90 ℃ or electroless plating time is 120 min,Ni-P coating completely covers the surface of anodized film,and the thickness of Ni-P coating reaches to 8 μm and10 μm,respectively.With the increase of p H value,Ni-P coating on the surface of AZ31 magnesium alloy increases gradually,and it completely covers the anodized film surface and its thickness is about 11 μm when the p H value increases to 10,but the deposition effect decreases when the p H increases to 10.3.
The effects of electroless plating parameters on the microstructure of anodized-electroless Ni-P coating on the surface of AZ31 magnesium alloy were studied by means of optical microscopy and XRD.The results show that the amorphous Ni-P coating can be obtained on the surface of anodized AZ31 magnesium alloy by electroless plating,and the coating has good adhesion with anodized film.With increasing of temperature or time of electroless plating,Ni-P coating increases gradually.When electroless plating temperature is 90 ℃ or electroless plating time is 120 min,Ni-P coating completely covers the surface of anodized film,and the thickness of Ni-P coating reaches to 8 μm and10 μm,respectively.With the increase of p H value,Ni-P coating on the surface of AZ31 magnesium alloy increases gradually,and it completely covers the anodized film surface and its thickness is about 11 μm when the p H value increases to 10,but the deposition effect decreases when the p H increases to 10.3.
引文
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[2]慕伟意,李争显,杜继红,等.镁合金的应用及其表面处理研究进展[J].表面技术,2011,40(2):86-91.Mu Weiyi,Li Zhengxian,Du Jihong,et al.Application and surface treatment research progress of magnesium alloys[J].Surface Technology,2011,40(2):86-91.
[3]王目孔,孙建新,刘新超.铸造镁合金研究与应用进展[J].有色金属工程,2012(2):56-59.Wang Mukong,Sun Jianxin,Liu Xinchao.Study and application of cast magnesium alloy[J].Nonferrous Metals Engineerings,2012(2):56-59.
[4]李瑛,余刚,刘跃龙,等.镁合金的表面处理及其发展趋势[J].表面技术,2003,32(2):1-5.Li Ying,Yu Gang,Liu Yuelong,et al.Surface treatment and development of magnesium alloys[J].Surface Technology,2013,32(2):1-5.
[5]王明,邵忠财,仝帅.镁合金表面处理技术的研究进展[J].电镀与精饰,2013,35(6):10-15.Wang Ming,Shao Zhongcai,Tong Shuai.Research advances of surface treatment for magnesium alloys[J].Plating and Finishing,2013,35(6):10-15.
[6]Gray J E,Luan B.Protective coatings on magnesium and its alloys-a critical review[J].Journal of Alloys and Compounds,2002,336:88-113.
[7]许诗源,郝维慧,刘楚明,等.ZK60镁合金表面化学镀镍[J].兵器材料科学与工程,2015,38(1):85-89.Xu Shiyuan,Hao Weihui,Liu Chuming,et al.Electroless nickel plating on ZK60 magnesium alloy substrate[J].Ordnance Material Science and Engineering,2015,38(1):85-89.
[8]张贤,胡建文,张楠,等.AZ91HP镁合金化学镀镍磷及镀层性能研究[J].表面技术,2016,45(12):73-77.Zhang Xian,Hu Jianwen,Zhang Nan,et al.Electroless Ni-P plating and coating properties of AZ91HP magnesium alloy[J].Surface Technology,2016,45(12):73-77.
[9]Zuleta A.A,Correa E,Castaňo J G,et al.Study of the formation of alkaline electroless Ni-P coating on magnesium and AZ31B magnesium alloy[J].Surface and Coatings Technology,2017,321:309-320.
[10]胡荣,陈英敏.含缓蚀剂的镁合金化学镀镍溶液及其所得镀层性能的研究[J].电镀与涂饰,2017,36(11):572-576.Hu Rong,Chen Yingmin.Study on electroless nickel plating bath with corrosion inhibitor for magnesium alloy and properties of the coating obtained thereby[J].Electropating and Finishing,2017,36(11):572-576.
[11]邱敬东,贾素秋,关景鑫.以磷酸盐-高锰酸钾体系化学转化作为前处理的AZ91D镁合金化学镀镍工艺[J].电镀与涂饰,2014,33(15):644-647.Qiu Jingdong,Jia Suqiu,Guan Jingxin,et al.Process of electroless nickel plating on AZ91D magnesium alloy pretreated by chemical conversion in phosphate-potassium permanganate system[J].Electropating and Finishing,2014,33(15):644-647.
[12]宿辉,王慧文.镁合金化学镀镍的研究进展[J].电镀与涂饰,2018,37(9):411-417.Su Hui,Wang Huiwen.Progress in research of electroless nickel plating on magnesium alloys[J].Electropating and Finishing,2018,37(9):411-417.