外文翻译--以硫酸镍为主盐的镁合金化学镀镍 英文版.pdf外文翻译--以硫酸镍为主盐的镁合金化学镀镍 英文版.pdf

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MAINBINREVISED261–3ELECTROLESSPLATINGSOLUTIONSANDLITTLEAPPLICATIONSINADDITION,THEBASICNICKELCARBONATEORNICKELACETATEOFAREHARMFULTOTHESURFACECOATINGSTECHNOLOGY2001INTRODUCTIONTHEUSEOFMAGNESIUMALLOYSINAVARIETYOFAPPLICATIONS,PARTICULARLYINAEROSPACE,AUTOMOBILES,ANDMECHANICALANDELECTRONICCOMPONENTS,HASINCREASEDSTEADILYINRECENTYEARSASMAGNESIUMALLOYSEXHIBITANATTRACTIVECOMBINATIONOFLOWDENSITY,HIGHSTRENGTHTOWEIGHTRATIO,EXCELLENTCASTABILITY,ANDGOODMECHANICALANDDAMPINGCHARACTERISTICSHOWEVER,MAGNESIUMISINTRINSICALLYHIGHLYREACTIVEANDITSALLOYSUSUALLYHAVERELATIVELYPOORCORROSIONRESISTANCE,WHICHISACTUALLYONEOFTHEMAINOBSTACLESTOTHEAPPLICATIONOFMAGNESIUMALLOYSINPRACTICALENVIRONMENTSHENCE,THEAPPLICATIONOFASURFACEENGINEERINGTECHNIQUEISTHEMOSTAPPROPRIATEMETHODTOFURTHERENHANCETHECORROSIONRESISTANCEAMONGTHEVARIOUSSURFACEENGINEERINGTECHNIQUESTHATAREAVAILABLEFORTHISPURPOSE,COATINGBYELECTROLESSNICKELISOFSPECIALINTERESTESPECIALLYINTHEELECTRONICINDUSTRY,DUETOTHEPOSSESSIONOFACOMBINATIONOFPROPERTIES,SUCHASGOODCORROSIONANDWEARRESISTANCE,DEPOSITUNIFORMITY,ELECTRICALANDTHERMALCONDUCTIVITY,ANDSOLDERABILITYETCASFARASMAGNESIUMALLOYSARECONCERNED,THEMAINSALTSOFELECTROLESSPLATINGSOLUTIONSMOSTLYFOCUSATTENTIONSONBASICNICKELCARBONATEORNICKELACETATE4–9,WHICHRESULTINHIGHCOST,LOWEFFICIENCY,INSTABILITYOFABSTRACTINTHISPAPER,THEELECTROLESSNICKELPLATINGONMAGNESIUMALLOYWASSTUDIED,USINGNISO4D6H2OASTHEMAINSALTINTHEELECTROLESSPLATINGALKALINESOLUTIONSTHEEFFECTSOFTHEBUFFERAGENTANDPLATINGPARAMETERSONTHEPROPERTIESANDSTRUCTURESOFTHEPLATINGCOATINGSONMAGNESIUMALLOYWEREINVESTIGATEDBYMEANSOFSCANNINGELECTRONMICROSCOPYSEM,ENERGYDISPERSIVEXRAYSPECTROSCOPYEDSANDXRAYDIFFRACTIONXRDINADDITION,THEWEIGHTLOSS/GAINOFTHESPECIMENSIMMERSEDINTHETESTSOLUTIONANDPLATINGBATHWASMEASUREDBYUSINGTHEELECTROBALANCE,TOEVALUATETHEEROSIONOFTHEALLOYINTHEPLATINGSOLUTIONSTHEADHESIONBETWEENTHEELECTROLESSPLATINGCOATINGSANDTHESUBSTRATESWASALSOEVALUATEDTHECOMPOSITIONSOFTHENONFLUORIDEANDENVIRONMENTALLYFRIENDLYPLATINGBATHWEREOPTIMIZEDTHROUGHLATINORTHOGONALEXPERIMENTTHEBUFFERAGENTNA2CO3ADDEDTOTHEPLATINGBATHWASFOUNDTOBEUSEFULININCREASINGTHEGROWTHRATEOFTHEPLATINGCOATING,ADJUSTINGTHEADHESIONBETWEENTHEELECTROLESSPLATINGCOATINGSANDTHESUBSTRATES,ANDMAINTAININGTHEPHVALUEWITHINTHERANGEOF85–115,WHICHISREQUIREDFORTHESUCCESSFULELECTROLESSNICKELPLATINGONMAGNESIUMALLOYWITHNISO4D6H2OASTHEMAINSALTTRISODIUMCITRATEDIHYDRATEWASFOUNDTOBEANESSENTIALCOMPONENTOFTHEPLATINGBATHTOPLATEMAGNESIUMALLOY,WITHANOPTIMUMCONCENTRATIONOF30GLC01THEOBTAINEDPLATINGCOATINGSARECRYSTALLINEWITHPREFERENTIALORIENTATIONOF111,HAVINGADVANTAGESSUCHASLOWPHOSPHORUSCONTENT,HIGHDENSITY,LOWPOROSITY,GOODCORROSIONRESISTANCEANDSTRENGTHENEDADHESIOND2004ELSEVIERBVALLRIGHTSRESERVEDKEYWORDSMAGNESIUMALLOY;ELECTROLESSPLATING;BUFFER;CORROSIONRESISTANCE;ADHESIONTHEELECTROLESSNICKELPLATINGONMAGNESIUMASTHEJIANZHONGLIA,,ZHONGCAISHAOASCHOOLOFMATERIALSANDMETALLURGY,NORTHEASTEBFACULTYOFENVIRONMENTANDCHEMICALENGINEERING,SHENYANGRECEIVED23JULY2004;ACCEPTEDAVAILABLEONLINE02578972/SEEFRONTMATTERD2004ELSEVIERBVALLRIGHTSRESERVEDDOI101016/JSURFCOAT200412009CORRESPONDINGAUTHORTEL862483687731;FAX862423981731EMAILADDRESSMENGSUO66163COMJLIALLOYUSINGNISO4D6H2OSALT,XINZHANGA,YANWENTIANARNUNIVERSITY,SHENYANG110004,CHINAINSTITUTEOFTECHNOLOGY,SHENYANG110168,CHINAFORM19DECEMBER2004JANUARY200520063010–3015WWWELSEVIERCOM/LOCATE/SURFCOATTODEVELOPNEWPLATINGSOLUTIONSYETINCLUDINGFLUORIDE,ENVIRONMENT,THEREFORE,ITISURGENTLYNEEDEDENVIRONMENTALLYFRIENDLYPLATINGBATHITISDIFFICULTTOCARRYOUTELECTROLESSPLATINGONMAGNESIUMALLOYSDUETOTHEHIGHCORROSIONRATEOFMAGNESIUMALLOYSINTHEPLATINGBATHWITHNISO4D6H2OORNICL2D6H2OASTHEMAINSALTITISREPORTED10THATTHECORROSIONRATEOFMAGNESIUMANDITSALLOYSINNACLSOLUTIONSSOLELYDEPENDSONTHEPHOFTHEBUFFEREDCHLORIDESOLUTIONSTHEOBJECTIVEOFTHISSTUDYWASTOFINDABUFFERAGENTANDDETERMINEHOWTHEBUFFERAGENTAFFECTSTHEDISSOLUTIONOFMAGNESIUMALLOYINNISO4D6H2OALKALINESOLUTIONS,ANDTHENONFLUORIDEPLATINGSOLUTIONSFORMAGNESIUMALLOYWITHNISO4D6H2OASTHEMAINSALTTHEMICROSTRUCTURE,COMPOSITIONSANDCORROSIONBEHAVIOROFTHECOATINGSWEREINVESTIGATEDINDETAILCONSTANTTEMPERATUREOF808CAFRESHBATHWASUSEDFOREACHEXPERIMENTTOAVOIDANYCHANGEINCONCENTRATIONOFBATHSPECIESTHEBATHCOMPOSITIONSANDOTHERPARAMETERSUSEDINTHESEEXPERIMENTSAREGIVENTHROUGHLATINORTHOGONALEXPERIMENTINTABLE3TABLE1CHEMICALCOMPOSITIONOFTHEAZ91DALLOYINWTALMNNICUZNCASIKFEMG9101700010001064B001B001B001B0001BALJLIETAL/SURFACECOATINGSTECHNOLOGY20020063010–30153011TABLE2OPTIMIZEDPRECLEANINGPROCEDURE2EXPERIMENTALTHESUBSTRATEMATERIALUSEDINTHERESEARCHWASAZ91DINGOTCASTALLOYTHECHEMICALCOMPOSITIONOFTHEALLOYISGIVENINTABLE1SUBSTRATESWITHASIZEOF50MMC240MMC220MMWEREUSEDINTHERESEARCHTHESUBSTRATESWEREMECHANICALLYPOLISHEDWITHEMERYPAPERSUPTO1000GRITTOENSURESIMILARSURFACEROUGHNESSTHEPOLISHEDSUBSTRATESWERETHOROUGHLYWASHEDWITHDISTILLEDWATERBEFOREPASSINGTHROUGHTHEPRECLEANINGPROCEDUREASSHOWNINTABLE2THESUBSTRATESWEREAIRDRIEDAFTERTHEFLUORIDEACTIVATIONTHELASTSTEPINTHEPRECLEANINGPROCEDUREINATYPICALEXPERIMENT,THEINITIALWEIGHTOFAAIRDRIEDSUBSTRATEWASMEASUREDANDTHENQUICKLYTRANSFERREDTOTHEPLATINGBATH1000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