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| EFFECT OF BIOFILM ON THE ELECTROCHEMICAL PASSIVITY OF STAINLESS STEEL |
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| 中船重工集团725所青岛分部 |
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Abstract The influence of microbes adhesion on the passive s
tate of high-Mo steel in natural seawater was studied.The conformation of biofi
lm on metal surface was studied by epifluorescence microscope.And analyzed the c
omposition of surface film with EDS.Results showed that the content of Cr in the
passive film of stainless steel increased a little due to the formation of biof
ilm.Polarization curves revealed that,in the earlier immersion time of high-Mo s
teel,the longer time immersed in natural seawater for high-Mo steel,the more pos
itive over-passivate potential and the less the passive current density will app
ear.In other words,the formation of biofilms added the passive film stability of
high-Mo stainless steels in natural seawater.
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Received: 15 June 2005
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[1]Dexter S C,Gao G Y.Effect of seawater biofilms on corrosion po-tential and oxygen reduction of stainless steel[J].Corrosion,1988,44(10):717-723
[2]Dexter S C,Lin S H.Calculation of seawater pH at polarized metalsurfaces in the presence of surface films[J].Corrosion,1992,48(1):50-60
[3]Zhang H J,Dexter S C.Effect of biofilms on crevice corrosion ofstainless steels in coastal seawater[J].Corrosion,1995,51(1):56-65
[4]Dexter S C,LaFontaine J P.Effect of natural marine biofilms ongalvanic corrosion[J].Corrosion,1998,54(11):851-861
[5]Li H R.Character of marine bacteria in micro-biofilm formed ondifferent artificial substrate[D].Qingdao:Ocean University of Chi-na,1998(李会荣.海洋细菌在不同基质表面形成微生物粘膜的变化特征[D].青岛:青岛海洋大学,1998)
[6]Mattila K,Carpen L,Hakkarainen T.Biofilm development duringennoblement of stainless steel in baltic seawater:a microscopic study[J].International Biodeterioration&Biodegradation,1997,40(1):1-10
[7]Wayne H Dickinson,Frank Caccavo J R,Lewandowski Z.Ennoble-ment of stainless steel by the manganese-depositing bacterium lep-tothrix discophora[J].Appl.Environ.Microbiol.,1997,63(7):2502-2506
[8]Paul W Baker,Kimio Ito,Kazuya Watanabe.Marine prosthecatebacteria involved in the ennoblement of stainless steel[J].Environ.Microbiol.,2003,5(10):925-932
[9]Washizu N,Katada Y,Kodama T.Role of H2O2in microbially in-fluenced ennoblement of open circuit potentials for type 316L stain-less steel in seawater[J].Corros.Sci.,2004,46(5):1291-1300
[10]Mansfeld F,Little B.A technical review of electrochemical tech-niques applied to microbiologically influenced corrosion[J].Corros.Sci.,1991,32(3):247-272
[11]Chandrasekaran P,Dexter S C.Mechanism of potential ennoble-ment on passive metals by seawater biofilms[A].Corrosion/93[C].International,Houston,TX,NACE,1993,493
[12]Roy Johnson,Einar Bardal.Cathodic properties of different stain-less steels in natural seawater[J].Corrosion,1985,41(5):296-302
[13]Dickinson W H,Lewandowski Z.Electrochemical concepts andtechniques in the study of stainless steel ennoblement[J].Biodegradation,1998,9:11-21
[14]Olesen B H,Avci R,Lewandowski Z.Manganese dioxide as a po-tential cathodic reactant in corrosion of stainless steels[J].Corros.Sci.,2000,42(2):211-227
[15]Scotto V,Lai M E.The ennoblement of stainless steels in seawa-ter:a likely explanation coming from the field[J].Corros.Sci.,1998,40(6):1007-1018
[16]Little B,Mansfeld F.“Passivity of Stainless Steels in Seawater”,The HH Uhlig Memorial Symposium-Corrosion Science:FromTheory to Practice,Published Proceeding Volumes 94-26,ISBN1-56677-085-5.The Electrochemical Society,Pennington,NJ,1994,p42
[17]Eashwar M,Maruthamutu S,et al.Ennoblement of stainless steelalloys by marine biofilms:an alternative mechanism[A].in Proc.12th Int.Corros.Cong[C].Houston,TX:NACE,1993,56:3708
[18]Chen G,Kagwade S V,French G E,et al.Metal ion and exopoly-mer interaction:a surface analytical study[J].Corrosion,1996,52(12):891-899P |
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