資源描述：
《納米晶鎂合金表面化學(xué)鍍ni-p合金鍍層的分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、太原理工大學(xué)碩士研究生學(xué)位論文resistanceofNi—Pcoating．Thethesisfocusedontheoptimumprocesstoobtainthefavourablecoatingofmorphology,uniformthickness，wearandcorrosionresistanceproperties．Tilematrixgrainweretessellatedanddefectswerereduced，SOthatthequalitywasenhancedandcorrosionresistaneeofNi—Pc
2、oatingonmagnesiumalloycouldbeimprovedthroughnano—processonthesurfaceofmagnesiumalloy．Inaddition，thepaperstudiedtheinfluenceofthermaltreatmentontheNi—PcoatingofNanocrystallinemagnesiumalloy．Basedonthestudies，themainconclusioncanbedrownasfollows：1、Theoptimaltechnologicalschemeof
3、electrolessplatingwhichwascheapandsimplewasconfirmedfrommultipleexperiments．NiS04’6H20NaH2P02’H20CH3COONaNH4HFHF(40％)thiocarbamidePH16g／L；14g／L；13g／L；8g／L；12ml／L；0．001g／L；6．4±O．2：Temperature：80±2℃。2、Thr。ughthisl(i11d。ftecllll。1。giJIllscheme,thetypicalcellularstructurecouldbeob
4、tainedwithcompactanduniformcoatingbutnoobviousdefect(averagein20—30Ⅲm)Ni—Pplatingwasphosphoruscoatingwithphosphorus。V】太原理工大學(xué)碩士研究生學(xué)位論文contentwasbetween5％and8％．3、Comparedtothecoarse—grainedmagnesiumalloy,theplatingrateonnanocrystallinewasslowerinmagnesiumalloysurfaceelectrolessp
5、latingwhichwastreatedbymeansofnano．Thereasonwasthatnanocrystallinemagnesiumalloyownthebiggerspecificsurfaceareaandencounteredmoreresistanceinstageofsurfacenucleation．Whereasinthenucleationstage，theactivationpointandplatingrateofnanocrystallinemagnesiumalloygotmore，coatingthick
6、nesswasalsogreat．4、ThehardnessoftheNi—Pcoatingonthesurfaceofmagnesiumalloywasreachedto427HVwhereasthecoatingonthenanocrystallinecouldbeattainedto689HVBymeansofthermaltreatment．thehardnessofthecoatingwaspromotedfurtheron．Especiallywhenthetemperaturewas300。C，itcouldbereachedto13
7、0HV．Thewear—resistingperformanceofthecoatingcouldbepromotedthroughthehardness．Moreover，thefrictioncoefficientisdecreaseslightly．5、Thecorrosionresistanceofmagnesiumalloycouldbereducedbynanocrystalline，butitonNi—Pcoatingwasincreased．Thecorrosionresistanceofcoatingdepressedaftert
8、hermaltreatment．Meanwhile，itgotworseandworseinthewakeoftemper
