无铬钝化工艺

,,(,411104):,,XZ203B,,:,,,,,,:;;;:TQ153.1+5:A:10052748X(2007)0920467203NON2CHROMIUMPASSIVATINGTECHNOLOGYFORZINCPLATEDCOATINGXIAOXin,ZHONGPing,YIXiang(Dept.ofChemistryandChemicalEngineering,HunanInstituteofEngineering,Xiangtan411104,China)Abstract:Inordertoimprovethecorrosionresistanceofzincplatedcoating,anewtechnologyofnon2chromiumpassivatingforzincplatedcoatingwasdevelopedbyaddingmolybdate,sodiumphosphateandadditiveXZ203B.Theeffectsofpassivatingbathcompositionandoperatingconditiononthepropertiesofpassivatedcoatingwerestudied,andthepropertiesofpassivatedcoatingweretested.Thepassivatedcoatingobtainedisiridescent.Thepropertiesofnon2chromiumpassivatedcoatingaresimilartothoseofchromatepassivatedcoating.Keywords:Zincplatedcoating;Non2chromiumpassivating;Molybdate;Corrosionresistance0,,,,,,,,,[1-5]:,,[6],,[7-9],,:2006210212,,,,,,1:()()XZ203B():()DJS2292()ZDA220A/12V()YWR/Q2250():125%Na2CO3(4050,58s)(3%HNO3)(4050)22.176428920079CORROSION&PROTECTIONVol.28No.9September2007©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:15g/L2g/L2g/LXZ203BOP210pH45,20502min2.22.2.1,(1)1,g/L5,,,8,,,10,,,20,,,25,,,,1020g/L;,,,;,,,,,2.2.2,,,Zn,,,,,,2,1.02.0g/L;2,g/L0.5,,,1.0,,,2.0,,,2.5,,,,,;,,,2.2.3XZ203B,,22.5g/L;,,,;,,,,2.2.4OP210OP210,,/,H2,,0.080.15g/L2.32.3.1pHpH(3)3pHpH2,,,3,,,4,,,4.5,,,5,,,5.5,,,3,pH34.5,,E2pHE2pH,pH35,,pH5,Zn(OH)2,,864:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:4555,2.3.3,,,;,,,,,6090s2.42.4.155,,[6]8090121268h72hGB6458-19865%NaCl168h192hGB6807-19862.4.25%,1cm2,(1cm2),,10min,,1min,,11,,,,,,13,:1020g/L,1.02.0g/L,XZ203B2.02.5g/L,pH34.5,4555,6090s,,,,,,,:[1],,,.[J].,2002,35(12):35-36.[2],,,.[J].,2000,20(1):21-23.[3],,,.Zn[J].,2001,13(1):46-48.[4],,,.[J].,2003,32(2):6-8.[5],,,.2[J].,2005,17(5):184-186.[6]BruceRW,Hinton.CorrosionPreventionandChro2mates,TheendofanEra[J].MetalFinishing,1991,89(9):55.[7],,,.2[J].,2000,33(2):39-40.[8],,,.[J].,2001,34(11):7-9.[9],,,.[J].,2002,22(6):17-19.964:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.