铝合金表面蓝色微弧氧化膜的制备工艺与组织结构

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1、山东大学硕士学位论文关键字：6063铝合金；微弧氧化；蓝色；硫酸钴摘要ABSTRACTA1umin啪aJlditsalloysarewidelyappliedtoaerospaCea11dautomotiVeindustriesduetotheirexcellentproperties，SuchashighSpecificstren垂h，lightmaSsa11deasyfo珊abili够．HoweVer，t11eirextensiVeapplicationsarerestrictedinmanyindust巧fieldsowingtotheirpoorsurfaceha

2、rdness，corrosionresistance，aIldwearresistance．Itisofgreatnecessitytopreparebeautimlandgoodqualitycoatingbysurfacetreatnlent．ThecoloredcoatingonA1urllinWnanditsalloysispr印aredbytraditionaltecllIlology，suchaschemicalcoloringprocess，wholestainingandelectrocolorprocess．HoweVer，mecoloredcoatin

3、gsareratllerthinandfaUofreasily．Micro-arcoxidationisapromisingsurf．acetre锄enttecllIlologyeVolVing行omconVentionalanodizing．Afilmwithexcellentcorrosionresis切nce，adhesionaJldbeauti如lsurfacecallbepreparedbyMicro-arcoxidation．Intllisp印er，abluecoatingwaspreparedon6063al眦inumalloybymicro-arcoxid

4、ation(MAO)inNaSi03·KOHelectrolyte，andCoS04waSselectedascolorant．Thee丘．ectsofelectrolytecompositionandelectricalparametersoncoatingsurfaceaJldpropertieswereinVestigated．Thethicl【11ess，phaSecomposition，surfacemo印hology’corrosionresistaIlceandadhesionwereaSsessedusingeddycuHenttmcknessmeter，

5、X—raydi妇斗actometer(XRD)，sc籼ingelectronmicroscope(SEM)，transmissionelectronmicroscope(TEM)，electrochemicalcorI．osiontestandscratchtest，respectiVely．Thenateclulologicalpar觚1eterischosen，bywhichthebluecoatingwimgoodqualityisprepared．Astheexperimentalresultssuggest，theinnuencesofNaSi03，CoS04，

6、positiVeandnegatiVeVoltagesoncoatingaresimilar．AsitsValueincreases，thecoatingcolorde印ened，thethicknessishi曲er，theadllesionandco玎osionresis切ncefirstlyincreaSeandthendegrade，respectiVely．WitlladditionofNaF，mecoatingpresemsdeepenedc010r，hi啦erthickness，hi曲eradhesiona11dcorrosionresista血ce．Wit

7、htheincreaLseofdutyratio，thecolordepth，tmcknessandcorrosionresistanceofcoatingincrease，thecoatingadhesionfirStlyincre2Lseandthende铲ade．So也ebluecoatingIU山东大学硕士学位论文withunifomaIldcompactsurf．aceisfomedandpresentshighadhesionandcorrosionresistancebytheteclulologicalpar锄