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ADHESION MECHANISM OF DIRECT ELECTROLESSNICKEL COATING ON MAGNESIUM ALLOYS〖ST〗〖HT〗〖WT〗〖KH1D〗 |
Xinkuan Liu;Yanghui Xiang;Wenbin Hu |
上海交通大学材料科学与工程学院 |
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Abstract The theoretical calculation and XPS analysis show t hat the fluoride layer formed during activation in hydrogen fluoride acid dissol ves little in electroless plating bath.The adhesive characteristics of nickel co ating with the magnesium alloys matrix were studied by means of the analysis of the initially deposited nickel and the cross section of the coating as well as t he fracture surface by using TEM,XPS,SAM.It is shown that there exists a mixture co mpound layer above the matrix surface between the magnesium and the nickel coati ng,which consists of fluoride,nickel and the composition of plating bath.Fractur e usually occurs in the mixture layer which is the weakest link for the adhesion of nickel coating on the magnesium alloys.
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Received: 13 January 2001
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Corresponding Authors:
Xinkuan Liu
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[1]MakarGL ,KrugerJ .Corrosionofmagnesium[J].Inter.Mater.Rew.,1993,38(3):138-153 [2]LiuXikuan,XiangYanghui,HuWenbin,etal.Reviewofelectrolessnickelcoatingonmagnesiumalloys[J].AerospaceMaterials&Technology,2001,4:21-25(刘新宽,向阳辉,胡文彬,等.镁合金化学镀镍研究状况[J].宇航材料工艺,2001,4:21-25) [3]BrownL .UKcompanyleadsthewayinmagnesiumplating[J].Fin ishing,1994,18(11):22-23 [4]Standardguideforpreparationofmagnesiumandmagnesiumalloysforelectroplating[S].ASTMDesignation:B480-88 [5]FairweatherWA .Electrolessnickelplatingofmagnesium[J].TransIMF ,1997,75(3):113-117 [6]ZhangXianglin.CompoundChemistry[M].Changsha:PressofCen tralSouthPolytechnicUniversity,1988(张祥麟.配合物化学[M].长沙:中南工业大学出版社,1988) [7]XiangYH .Astudyonsurfacestateduringthepretreatmentofelec trolessnickelplatingonmagnesiumalloys[J].TransIMF ,tobepublished. [8]WangJianqi,WuWenhui,FengDaming.IntroductionofElectronicSpectroscopy(XPS/XAES/UPS)[M ].Beijing:DefensiveIndustryPress,1992(王建琪,吴文辉,冯大明.电子能谱学(XPS/XAES/UPS)引论[M].北京:国防工业出版社,1992) [9]XiangYanghui.Initialdepositionmechanismofelectrolessnickelcoatingonmagnesiumalloys[J].JournalofShanghaiJiaotongUni versity,2000,34(12):1638-1640(向阳辉.镁合金直接化学镀镍的初始沉积机制[J].上海交通大学学报,2000,34(12):1638-1640) |
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