新型銅鎳合金海水微生物腐蝕的電化學研究.pdf

1、哈爾濱理工大學碩士學位論文新型銅鎳合金海水微生物腐蝕的電化學研究姓名：王濤申請學位級別：碩士專業(yè)：材料加工工程指導教師：康福偉20090301哈爾濱理丁大學T學碩十學位論文ElectrochemicalStudyofMicrobiologicallyInfluencedCorrosiononCopperNickelAlloyinMarineEnvironmentAbstractMicrobiologicallyinfluencedcor

2、rosion(MIC)isaseriousproblemformarineengineeringstructuresMICischaracterizedbythatmicroorganismsattachtothesurfacesofmetaloralloyandformbiofilmswhichchangecorrosiveconditionssuchasdissolvedoxygen，pHandchemicalspeciescont

3、entswithinthebiofilm，thenacceleratecorrosionCopper—basedalloysareamongthemostimportantcommercialmetalsinthemarineenvironmentduetotheirexcellentelectricalandthermalconductivities，goodcorrosionresistanceandeaseofmanufactur

4、eHoweverCuNialloyarefoundtobesusceptibletoMICTheMICofcoppernickelalloyhasreceivedconsiderableattentionintheliteratureduetoitswidespreaduseinseawaterandsalineenvironmentsTostudytheeffectsandcorrosionmechanismsonCuNialloyv

5、ariouselectrochemicalmethodsforMICstudyarecarriedoutinthispaper，includingcorrosionpotential，electrochemicalimpedancespectroscopy(ElS)，polarizationcurve，electrochemicalsurfaceimagingandSOonScanningelectronmicroscopy(SEM)a

6、ndenergydispersivespectrometer(EDS)arealsousedtoobservethecorrosionmorphologyOpencircuitpotential，plarizationCUWCSandimpedancespectracurvesofCu—Nialloyinculturemediumwithandwithoutmicrobewerestudiedinlab，andthecorrosionb

7、ehaviorandmechanismofCu—NialloyinfluencedbyoceanicmicrobewerealsoinvestigatedTheopencircuitpotentialofCu—Nialloyexposedinculturemediumwithbacteriawashigherthanwithoutbacteriabutmovedtowardsnegativequicklyaftertransientar