脉冲换向电刷镀镍基纳米SiO_2复合镀层的耐腐蚀性能研究

:2005212208:(50235030)(51489020104JS9102):,,1961,,,SiO2(100072):Ni/n-SiO2,SEM,,,.:,Ni/n-SiO2.::TQ153.2:A:100524537(2006)04201932041.,,.,SiO2,,Ni/n-SiO2Ni[13]...[48],,,,,,,.,(DC)(PR)NiNi/n-SiO2,,.2:134g/L,30g/L,(11)15mL/L,(11)30mL/L,SiO220g/L..SiO220nm50nm,9919%..DSD-75MD-100.45#(10cm215cm012cm).:,()100m5m,1.Quanta200(SEM),PMG3AS-1.,TG-328A(011mg,200mg).,,712cm2(118cm4cm).27g/LNaCl,6g/LMgCl2,1g/LCaCl2,1g/LKCl.M273M352.,,315%NaCl.,012mV/s.3311,Ni(1a),.,26420068JournalofChineseSocietyforCorrosionandProtectionVol126No14Aug12006©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(-5)frequency1000Hz;dutycircle50%(every2negativepulsesafterevery8positivepulses)Fig.1Surfacemorpholgiesofcoatingsbybrushplating(a)Nicoating(DC),(b)Ni/n-SiO2coating(DC),(c)Ni/n-SiO2coating(PR)Fig.2Thecomparisonofporositiesofcoatingsbybrushplating(a)Nicoating(DC),(b)Ni/n-SiO2coating(DC),(c)Ni/n-SiO2coating(PR)Table2Porositiesofcoatingsbybrushplatingcoatingsporosities/%NicoatingbyDC9114Ni/n-SiO2coatingbyDC3167Ni/n-SiO2coatingbyPR0168,.Ni/n-SiO2(1b),,.[9],.Ni/n-SiO2(1c).:,,,,,,,.SiO2,,[8].312..2.2(70m80m).:P=ShSP,Sh,S.2,NiNi/n-SiO249126©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)Nicoating(DC),(b)Ni/n-SiO2coating(DC),(c)Ni/n-SiO2coating(PR)314.,Ni(4a),,,,,;Ni/n-SiO2,,,,,(4b);Ni/n-SiO2,,,(4c)..315%NaCl(5),Ni/SiO2,.(3),Ni/n-SiO2Ni1/4,Ni/n-SiO2Fig.5Polarizationcurvesofcoatingsin3.5%NaClsolution(1)Ni/n-SiO2coatingbyDC,(2)NicoatingbyDC,(3)Ni/n-SiO2coatingbyPRTable3Corrosioncurrentdensitiesofcoatingsbybrushplatingcoatingsi/Acm-2NicoatingbyDC41185Ni/n-SiO2coatingbyDC11108Ni/n-SiO2coatingbyPR116245914:SiO2©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:[1]TanJ,YaoQ,XuBS.MorphologyandtribologicalbehaviorofNi/n-SiO2compositecoatingpreparedbypulsecurrentbrushplating[J].Mater.Prot.,2005,38(2):1-3(,,.[J].,2005,38(2):1-3)[2]WangHM,JiangB,XuBS,etal.MicrostructureandfrettingwearbehaviorofNibasedcompositecoatingsreinforcedbySiO2nanopar2ticles[J].Tribology,2005,25(4):289-293(,,.SiO2[J].,2005,25(4):289-293)[3]ZhouXP,WangPF,YanHY.MicrostructureandwearresistanceofbrushplatedNi/nano-SiO2compositecoating[J].JournalofHubeiPolytechnicUniversity,2004,19(1):27-29(,,.SiO2[J].,2004,19(1):27-29)[4]StojakJL,TalbotJB.Investigationofelectro-codepositionusingarotatingcylinderelectrode[J].J.Electrochem.Soc.,1999,146(12):4504-4513[5]VanekD.Anupdateonbrushplating[J].MetalFinishing,2000(7):18-20[6]PodlahaEJ,LandoltD.Pulse-reverseplatingofnanocompositethinfilms[J].J.Electrochem.Soc.,1997,144(7):200-202[7]MuraliKR,SwaminathanV.Effectofpulsereversalontheproper2tiesofpulseplatedCdSexTe1-xthinfilms[J].JournalofAppliedElectrochemistry,2002,32(10):1151-1156[8]ZhuRA,GuoZC.PulsePlating[M].Beijing:ElectronIndustryPress,1986:256-264(,.[M].:,1986:256-264)[9]XuBS.NanoSurfaceEngineering[M].Beijing:ChemicalIndustryPress,2004:210-212(.[M].:,2004:210-212)CORROSIONRESISTANCEOFNi/n-SiO2COMPOSITECOATINGSBYPULSE-REVERSEBRUSHPLATINGTANJun,GUOWencai,XUBinshi,YANGHongjun(NationalKeyLaboratoryforRemanufacturing,AcademyofArmoredForceEngineering,Beijing100072)Abstract:TheNi/n-SiO2coatingwasdepositedbypulse-reversebrushplating.ThesurfacemorphologyofthecoatingwasanalyzedbySEM,theporosityofthecoatingwasevaluatedandthecorrosionresistanceofthecoat2ingwasmeasuredinthesolutionofseawater.Thecorrosionmechanismofthecoatingwasalsodiscussed.Theresultshowsthat,comparedwithNiandNi/n-SiO2coatingsdepositedbydirectcurrent,theNi/n-SiO2coat2ingbypulse-reversecurrenthasmuchcompactandfinersurfacemorphology,lowerporosityandbettercorro2sionresistance.Keywords:directcurrent(DC),pulse-reversecurrent(PR),brushplating,nano-compositecoating69126©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.