直流、单向脉冲和换向脉冲法制备镍-钴-碳化钨复合镀层的比较-论文.pdf

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1、VroI．32No．3ComparisonofNi-Co-WCcompositecoatingspreparedbydirect，pulseandpulsereversecurrentmethodsRanjithBose～．G．ParuthimalKalaignan2K．N．Srinivasan(1．R&DDepartment，ReemBatteries&PowerAppliancesCoSAOC，SultanateofOman；2．AdvancedNano—CompositeCoatingsLaboratory，Depa

2、rtmentofIndustrialChemistry，AlagappaUniversity，Karaikudi一630003，Tamilnadu，India；3．CentralElectrochemicalResearchInstitute，Karaikudi-630006，Tamilnadu，India)Abstract：Ni—Co_WCcompositecoatingswerepreparedbydirectcurrent(DC)，pulsecurrent(PC)andpulsereverseCompositeele

3、ctrOdepOsitiOntechniqueisoneofthecurent(PRC)methodsusinganacetatebath．Themethodsusedtofabricatemetalmatrixcompositecoatings．microstructureandcorosionresistanceofthecoatingswereTheprocessinvolvesembeddingofinsolublemetalmicro—characterizedbySEMandelectrochemicalimp

4、edancepowderssuspendedinasolutionbyperforminganyonespectroscopy(EIS)．TheresultsshowedthattheoftheelectrodepositiontechniquessuchasdirectcurrentmicrostructureandperformancesofthecoatingsweregreatlyaffectedbyWCcontentinthedeposits．Themicrohardness(DC)，pulsecurrent(P

5、C)andpulsereversecurent(PRC)andcorosionresistancewereenhancedintheoptimalelectrOdepOsitiOntechniques．PulseelectrodepositionpercentageofWCincompositecoatings．ThePRCtechniqueismoreeffectiveinthefabricationofmetalcompositecoatingsexhibitmorecompactsurfaces，highercoat

6、ingswhichcontainuniquecompositionsandmicro-microhardnessandbettercorrosionresistanceascomparedstructureswhencomparedtoDCelectrodepositionsincewiththePCandDCcompositecoatings．Keywords：nickel-cobaltalloy；tungstencarbide；compositepulseelectrOdepositiOnoffersmoreproce

7、sscontrollablecoating；microhardness；electrochemistry；surfacemorphologyparameterswhichcanbeadjustedindependentlyandcanCLCnumber：TQ153．2Documentcode：Awithstandmuchhigherinstantaneouscurrentdensities．ArticleID：1004—227X(2013、03—0009—05PulseelectrOdepOsitiOniseitherdo

8、nebypulsecurrent直流、单向脉冲和换向脉冲法制备镍_毫i化钨复合镀层的比较(PC)orpulsereversecurrent(PRC)technique．／／B0SER．KALAIGNANGP．SRrNIVASANKN摘要：在醋酸盐镀液体系中采用直流(DC)、单向脉冲电流(pc)Tungs