欢迎来到人人文库网! | 帮助中心 人人文库renrendoc.com美如初恋!
人人文库网
首页 人人文库网 > 资源分类 > PDF文档下载

外文翻译--在硫酸盐溶液中对AZ91D镁合金进行化学镀镍磷合金 英文版.pdf

  • 资源大小:578.22KB        全文页数:6页
  • 资源格式: PDF        下载权限:游客/注册会员/VIP会员    下载费用:5
游客快捷下载 游客一键下载
会员登录下载
下载资源需要5

邮箱/手机号:
您支付成功后,系统会自动为您创建此邮箱/手机号的账号,密码跟您输入的邮箱/手机号一致,以方便您下次登录下载和查看订单。注:支付完成后需要自己下载文件,并不会自动发送文件哦!

支付方式: 微信支付    支付宝   
验证码:   换一换

友情提示
2、本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

外文翻译--在硫酸盐溶液中对AZ91D镁合金进行化学镀镍磷合金 英文版.pdf

ABSTRACTTHEDEPOSITSALLOWMORENI–PK1174THETHEIROFPROPERTIESTHELURANDFECTIALLOMAGNESIUMMAGNESIUMORDINARYCANMAGNESIUMSHOULD09258388/DOI101016/JJALLCOM200407083JOURNALOFALLOYSANDCOMPOUNDS3912005104–109ELECTROLESSNI–PPLATINGONAZ91DMAGNESIUMALLOYFROMASULFATESOLUTIONCHANGDONGGU,JIANSHELIAN,GUANGYULI,LIYUANNIU,ZHONGHAOJIANG∗THEKEYLABOFAUTOMOBILEMATERIALS,MINISTRYOFEDUCATION,COLLEGEOFMATERIALSSCIENCEANDENGINEERING,JILINUNIVERSITY,NANLINGCAMPUS,CHANGCHUN130025,CHINARECEIVED14MAY2004;ACCEPTED9JULY2004AVAILABLEONLINE8DECEMBER2004DIRECTELECTROLESSNI–PPLATINGONTHEAZ91DMAGNESIUMALLOYFROMAPLATINGBATHCONTAININGSULFATENICKELWASINVESTIGATEDINTHEPAPERNUCLEATIONMECHANISMOFNI–PDEPOSITSONTHEAZ91DMAGNESIUMALLOYWASSTUDIEDBYUSINGXRDANDSEMTHEELECTROLESSNI–PWEREPREFERENTIALLYNUCLEATEDONTHEH9252MG17AL12PHASEANDEXTENDEDTOTHEPRIMARYANDEUTECTICH9251PHASESOFTHEAZ91DMAGNESIUMYTHEEFFECTOFTHEACIDPICKLETREATMENTTIMEOFTHEAZ91DMAGNESIUMALLOYSUBSTRATEONTHEELECTROLESSNI–PPLATINGWASALSOINVESTIGATEDITHPROLONGINGTHEACIDPICKLETREATMENTTIME,THECLUSTEROFELECTROLESSNI–PDEPOSITIONBECAMESMALLERANDTHEDEPOSITSWEREFOUNDTOBECOMPACTTHEDEPOSITIONRATEOFELECTROLESSNI–PPLATINGWASPROPORTIONALTOTHEACIDPICKLETREATMENTTIMETHEHARDNESSVALUESOFTHECOATINGSWEREABOUT660VHNANDWERENOTINFLUENCEDBYTHEPRETREATMENTS2004ELSEVIERBVALLRIGHTSRESERVEDEYWORDSSURFACESANDINTERFACES;ELECTROCHEMICALREACTION;METALS;XRAYDIFFRACTIONINTRODUCTIONMAGNESIUMISONEOFTHELIGHTESTMETALSWITHADENSITYOFG/CM3ANDMAGNESIUMALLOYSHAVEBEENUSEDWILDLYINAEROSPACE,ELECTRONICSANDAUTOMOBILEFIELDSBECAUSEOFHIGHSTRENGTHTOWEIGHTRATIOHOWEVER,THEAPPLICATIONMAGNESIUMALLOYSHASBEENLIMITEDDUETOTHEIRUNDESIRABLEINCLUDINGPOORCORROSIONANDLOWWEARRESISTANCECORROSIONOFMAGNESIUMALLOYSDEPENDSONTHEIRMETALGYANDENVIRONMENTALFACTORSMETALLURGICALMANIPULATIONSOMEOTHERCREATIVESYNTHESISTECHNIQUESPROVIDEANEFVEWAYTOIMPROVETHECORROSIONRESISTANCEOFMAGNESIUMYS1,2THEOTHEREFFECTIVEWAYTOPREVENTCORROSIONOFALLOYISTOCOATTHESUBSTRATEMATERIAL3SINCEISONEOFTHEMOSTELECTROCHEMICALLYACTIVEMETAL,COATINGS,SUCHASNICKEL,COPPERANDZINCCOATINGS,ONLYPROVIDEAPHYSICALBARRIERTOCORROSIONATTACKOFSUBSTRATESO,ANYCOATINGSONMAGNESIUMALLOYSBEASUNIFORM,ADHEREDANDPOREFREEASPOSSIBLE∗CORRESPONDINGAUTHORFAX864315095876EMAILADDRESSJIANGZHJLUEDUCNZJIANGHASNUMEROUSPROPERTIESWEARDUCTILITYTIONWITHOUTEASOFPLATINGTHATMAGNESIUMNEARLYPAPERSIUMSULFANDALLOIN–SEEFRONTMATTER2004ELSEVIERBVALLRIGHTSRESERVEDELECTROLESSDEPOSITIONTECHNIQUEOFNI–PALLOYCOATINGSBEENAWELLKNOWNCOMMERCIALPROCESSTHATHASFOUNDAPPLICATIONSINMANYFIELDSDUETOEXCELLENTOFCOATINGS,SUCHASHIGHCORROSIONRESISTANT,HIGHRESISTANT,GOODLUBRICITY,HIGHHARDNESSANDACCEPTABLE4–7ANOTHERADVANTAGEOFTHEELECTROLESSDEPOSITECHNIQUEISTHATVERYUNIFORMEDCOATINGSCANBEOBTAINEDSPECIALREQUIREMENTSFORSUBSTRATEGEOMETRIESHOWVER,ELECTROLESSNICKELPLATINGONDIFFICULTSUBSTRATES,SUCHMAGNESIUMALLOYS,HASMANYCHALLENGESINTHEPROCESSINGPLATINGANDTHEREISVERYLIMITEDREPORTSONELECTROLESSONMAGNESIUMALLOYSFURTHERMORE,ITCANBENOTEDINMANYPREVIOUSREPORTSONTHEELECTROLESSPLATINGONALLOYS8–11,THENICKELIONSWEREPROVIDEDBYBASICNICKELCARBONATEINTHEPLATINGBATHINTHIS,DIRECTELECTROLESSNI–PPLATINGONTHEAZ91DMAGNEALLOYWASUNDERTAKENBYUSINGAPLATINGBATHCONTAININGATENICKELTHENUCLEATIONMECHANISMOFNI–PDEPOSITSTHEEFFECTOFTHEACIDPICKLETREATMENTTIMEOFMAGNESIUMYSUBSTRATESONTHEELECTROLESSNI–PPLATINGWEREALSOVESTIGATEDCGUETAL/JOURNALOFALLOYSANDCOMPOUNDS2EXPERIMENTALTHESUBSTRATEMATERIALUSEDWASAZ91DDIECASTMAGNESIUMALLOYWITHASIZEOF30MM40MM5MMTHECHEMICALCOMPOSITIONOFTHEALLOYISGIVENINTABLE1THESAMPLESWEREABRADEDWITHNO1500SICPAPERBEFORETHEPRETREATMENTPROCESSESTHETECHNICALFLOWCHARTOFTHEELECTROLESSDEPOSITIONONTHEAZ91DMAGNESIUMALLOYISSHOWNINFIG1THESAMPLESWERECLEANEDTHOROUGHLYWITHDEIONIZEDWTREATMENTSALLOCROSCOPETHEPHOLOGYWANALYSISCONTENTSTRUCTURETOMETERTCHEMICALALZNMNFEMGFIGMAGNESIUMARATENESSESDEPOSITIONTESTERTIONALLOTHE24010ASDEPOSITEDNOTHEASRWHEREDCM331ANDIDEATERASQUICKLYASPOSSIBLEBETWEENANYTWOSTEPSOFTHEPRETHEACIDPICKLETREATMENTTIMEOFTHEMAGNESIUMYWASCHANGEABLEINTHISSTUDYASCANNINGELECTRONMISEM,JEOLJSM5310,JAPANWASEMPLOYEDFOROBSERVATIONSOFTHESURFACEANDTHECROSSSECTIONMOROFTHENI–PALLOYCOATINGSANDANEDXATTACHMENTASUSEDFORQUALITATIVEELEMENTALCHEMICALANALYSISEDXWASALSOUSEDFORTHEDETERMINATIONOFPHOSPHORUSOFTHEELECTROLESSNI–PDEPOSITIONCRYSTALLOGRAPHICOFTHESAMPLEWASSTUDIEDBYTHEXRAYDIFFRACXRD,RIGAKUDYMAX,JAPANWITHACUTARGETANDABLE1COMPOSITIONOFTHEAZ91DDIECASTMAGNESIUMALLOYWT91WT064PPM017PPM001BALANCE1THETECHNICALFLOWCHARTOFELECTROLESSNI–PPLATINGONTHEAZ91DALLOYHATHUS,GETTINGLOTROLESSXIANGORERSAFTERLEDLAYERCLEANINGSIGNEDB40COARSERMICROSTRUCTUREPRIMARYANDTHETHETOALLOTHEBYPRETREATMENTON3912005104–109105MONOCHROMATORAT50KVAND300MAWITHTHESCANNINGANDSTEPBEING4◦/MINAND002◦,RESPECTIVELYTHEHARDOFTHEMAGNESIUMALLOYBEFOREANDAFTERELECTROLESSWEREEVALUATEDUSINGAHXD1000MICROHARDNESSWITHVICKERSINDENTER,ATALOADOF100GANDADURAOF15STHEDEPOSITIONRATEROFTHEELECTROLESSNI–PYCANBEEXPRESSEDINTERMSOFTHEWEIGHTGAINDURINGDEPOSITIONPROCESSANANALYTICALBALANCEMETTLERAEMETTLERTOLEDO,SWITZERLANDWITHAPRECISIONTOH9262GWASEMPLOYEDTOWEIGHTHEASDEPOSITEDSAMPLESTHESAMPLEWASDRIEDANDWEIGHEDREPEATEDLYUNTILFURTHERCHANGEINTHEREADINGTOENSURECOMPLETEDRYINGOFNI–PALLOYACCORDINGLY,THEDEPOSITIONRATEISEXPRESSEDTHEFOLLOWS12,13Ω104DAT1RISTHEDEPOSITIONRATEH9262M/H,ΩTHEWEIGHTGAING,THEDENSITYOFTHEDEPOSIT,ATHESURFACEAREAOFDEPOSITION2ANDTTHEDEPOSITIONTIMEHRESULTSANDDISCUSSIONFUNCTIONSOFINDIVIDUALTREATMENTSMAGNESIUMANDITSALLOYSHAVEHIGHLYCHEMICALACTIVITYWHENTHEYCONTACTWITHAIRORWATER,OXIDEANDHYDROXFILMSWOULDBEFORMEDONTHESURFACE1,14,WHICHWOULDVEADETRIMENTALEFFECTONCOATINGADHESIONANDUNIFORMITYTHEPRETREATINGPROCESSESPLAYAVERYIMPORTANTROLEINAGOODPROTECTIVECOATINGONMAGNESIUMANDITSALYSASTUDYONSURFACESTATEDURINGTHEPRETREATMENTOFELECNICKELPLATINGONMAGNESIUMALLOYSWASREPORTEDBYETAL15ALKALINECLEANINGWASUSEDTOREMOVESOILSGREASESONTHESURFACEOFMAGNESIUMALLOYBUTSUCHCLEANARENOTSUITABLEFORREMOVINGOXIDEANDTHELIKE16SO,ALKALINECLEANING,THESAMPLESSHOULDBEETCHEDORPICKINACHROMICACID/NITRICACIDSOLUTIONTOREMOVEANYOXIDEOROTHERCHEMICALCOATINGSNOTFULLYREMOVEDBYALKALINEINTHISPAPER,THEACIDPICKLETREATMENTTIMEWASDEAS0,5,10,20,40AND60S,RESPECTIVELYFIG2AANDGIVETHEMORPHOLOGYOFACIDPICKLETREATMENTAFTER10ANDSITCANBESEENFROMFIG2THATTHETREATEDSURFACEBECAMEWITHPROLONGINGTHEACIDPICKLETREATMENTTIMETHEOFTHEAZ91DMAGNESIUMALLOYCONSISTEDOFH9251MGGRAINSSURROUNDEDBYAEUTECTICMIXTUREOFH9251H9252MG17AL1217MG17AL12ISCATHODICWITHRESPECTTOMATRIX,RESULTINGINANONUNIFORMSURFACEPOTENTIALACROSSSUBSTRATE1SO,THENEXTFLUORIDEACTIVATIONTREATMENTISCREATEANEQUIPOTENTIALIZEDFILMMGF2ONTHEMAGNESIUMYSURFACEITISANINDISPENSABLESTEPOFPRETREATMENTINPROCESSINGOFELECTROLESSPLATINGONMAGNESIUMALLOYSXPSANALYSIS,XIANGETAL11INDICATEDTHATAFTERTHEOFFLUORIDEACTIVATION,THEFLUORIDEFILMMGF2SURFACEOFMAGNESIUMALLOYWASDISCONTINUOUSACCORDING106ANDCOMPOUNDSFIGPICKLETOTHANSURFOGYWITHOUTSURFTERFIGDIFSEETHANMAYTIONANDMETALREDUCINGCOMPLETIONTOBATH32THETREATMENTDEPOSITSTREATMENTTHEACIDDEPOSITSCGUETAL/JOURNALOFALLOYS2THEMORPHOLOGIESOFTHEAZ91DMAGNESIUMALLOYAFTERPRETREATMENTSA40SFOLLOWEDBYFLUORIDEACTIVATIONREF9,THETIMEOFFLUORIDEACTIVATIONSHOULDNOTBELESS10MINSOASTOFORMTHECOMPLETELYMGF2FILMSONTHEACEOFTHEMAGNESIUMALLOYFIG2CSHOWSTHEMORPHOLOFTHEAZ91DMAGNESIUMALLOYAFTERFLUORIDEACTIVATIONACIDPICKLETREATMENTITCANBESEENTHATTHESUBSTRATEACEWASSLIGHTLYCORRODEDAFTERTHEFLUORIDEACTIVATIONAFACIDPICKLE40SFOLLOWINGBYTHEFLUORIDEACTIVATIONSEE2D,THESUBSTRATESURFACEDOESNOTSHOWSIGNIFICANTLYFERENCEFROMTHATWITHTHEACIDPICKLETREATMENTOF40SFIG2BIFTHEACIDPICKLETREATMENTTIMEWASLARGER60S,THESUBSTRATEWOULDBESEVERELYCORRODED,WHICHINFLUENCETHEPRACTICALUSAGEOFTHEMAGNESIUMALLOYDURINGTHEPROCESSOFELECTROLESSNI–PPLATING,THEFUNCOFSULFATENICKELNISO46H2OISTOPROVIDENICKELIONS,THESODIUMHYPOPHOSPHITENA2H2PO2H2OACTSASAAGENTSODIUMACETATENAC2H3O2ISTHEXINGAGENTOFTHENICKELIONSTHIOUREAACTSASASOLUSTABILIZERANDTHEAMMONIASOLUTIONNH3H2OISUSEDADJUSTPHOFTHEPLATINGBATHTHEFLUORIDEINTHEPLATINGISTOINHIBITCORROSIONOFTHESUBSTRATEDURINGPLATINGEFFECTOFACIDPICKLETIMETHEMORPHOLOGIESOFELECTROLESSNI–PDEPOSITSAFTER1HONAZ91DMAGNESIUMALLOYASAFUNCTIONOFTHEACIDPICKLETIMEARESHOWNINFIG3ITCANBESEENTHATTHENI–PONTHEAZ91DMAGNESIUMALLOYWITHOUTACIDPICKLESEEFIG3ASHOWEDMOREBUMPSANDLOOSETHANSAMPLESWITHACIDPICKLETREATMENTWITHPROLONGINGTHEPICKLETREATMENTTIME,THECLUSTEROFTHEELECTROLESSNI–PBECAMESMALLERANDTHENI–PDEPOSITSWEREFOUNDTOPOSIT12TAKRATESEQDEPOSITIONITACIDTREATMENTWFWNI–PMORPHOLOGYINGBETHEPICKLEMECHANICALAANDTOINTHEWILLFIGNI–P1THEFIG3912005104–109ACIDPICKLE10S,BACIDPICKLE40S,CFLUORIDEACTIVATION,ANDDACIDBEMORECOMPACTTHEPHOSPHORUSCONTENTINTHENI–PDEWASABOUT372WTBYEDXANALYSISACCORDINGTO,THECORRESPONDINGDENSITYOFTHENI–PDEPOSITCANBEENAS85G/CM3BYSUNGTHISDENSITYVALUE,THEDEPOSITIONOFTHEELECTROLESSNI–PPLATINGWEREDETERMINEDFROM1THEEFFECTOFTHEACIDPICKLETREATMENTTIMEONTHERATEOFELECTROLESSNI–PPLATINGISSHOWNINFIG4CANBESEENTHATTHEDEPOSITIONRATEWASPROPORTIONALTOTHEPICKLETREATMENTTIMEWITHPROLONGINGOFTHEACIDPICKLETIME,THESUBSTRATEWASMUCHMORECORRODED,WHICHOULDPROVIDEMORECHEMICALLYACTIVEONTHESUBSTRATESURACEFORTHEELECTROLESSPLATINGFURTHERMORE,THEACIDPICKLINGOULDRESULTINBETTERMECHANICALADHESIONOFTHEELECTROLESSPLATINGONTHEMAGNESIUMALLOY3,9FIG5SHOWSTHEOFTHECROSSSECTIONOFELECTROLESSNI–PCOATONTHEAZ91DMAGNESIUMALLOYFROMFIG5A,ITCANSEENTHATTHEELECTROLESSNI–PCOATINGWASEMBEDDEDINMAGNESIUMALLOYSUBSTRATEATTHEINTERFACESO,THEACIDPRETREATMENTPROVIDESSURFACEPITSTOACTASSITESFORINTERLOCKINGTOIMPROVEADHESION3INCONTRAST,DISTINCTINTERFACEWITHOUTINTERLOCKINGBETWEENTHECOATINGTHESUBSTRATEWASOBSERVEDFORTHESAMPLEFIG5BDUELACKOFTHEACIDPICKLETREATMENTHOWEVER,SOMEPORESTHECOATINGSINFIG5MAYRESULTFROMTHEEVALUATIONOFHYDROGENDURINGTHEELECTROLESSDEPOSITIONFURTHERWORKBEDONEBYTHEPRESENTAUTHORSTOELIMINATETHESEPORES6GIVESTHEQUALITATIVECHEMICALANALYSISOFELECTROLESSPLATINGONTHEAZ91DMAGNESIUMALLOYAFTERPLATINGHBYEDXANALYSISFROMTHEELEMENTSDISTRIBUTINGFROMCOATINGSURFACETOTHESUBSTRATEALONGTHELINELABELEDIN6,ITCANBESEENTHATTHECOATINGWASCONNECTEDCLOSELYTOFIGDTHEOFANDAZ91DFIGTHECGUETAL/JOURNALOFALLOYSANDCOMPOUNDS3THEMORPHOLOGIESOFELECTROLESSNI–PDEPOSITIONONTHEAZ91DMAGNESIUM20S,E40SANDF60SSUBSTRATETHEHARDNESSTESTSINDICATEDTHATTHEHARDNESSTHENI–PCOATINGSWASNO

注意事项

本文(外文翻译--在硫酸盐溶液中对AZ91D镁合金进行化学镀镍磷合金 英文版.pdf)为本站会员(英文资料库)主动上传,人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知人人文库网(发送邮件至[email protected]或直接QQ联系客服),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

[email protected] 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

经营许可证编号:苏ICP备12009002号-5