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1、Corrosionofsteelstructuresinsea-bedsedimentXIUTONGWANG?,?,JIZHOUDUAN*,?,YANLI?,JIEZHANG?,?,SHIDEMA?andBAORONGHOU?OceanUniversityofChina,Qingdao266003,China?InstituteofOceanology,ChineseAcademyofSciences,Qingdao266071,China?GraduateSchooloftheChineseAcadem
2、yofSciences,Beijing100039,ChinaMSreceived20September2004;revised28January2005Abstract.Seabedsediment(SBS)isaspecialsoilthatiscoveredbyseawater.Withthedevelopmentsinmarineoilexploitationandengineering,moreandmoresteelstructureshavebeenburiedinSBS.SBScorros
3、ionhasnowbecomeaseriousprobleminmarineenvironmentandanimportantissueincorrosionscience.Inthispaper,approachinthefieldofSBScorrosionisreviewed.Electrochemicalandmicrobialcorrosionfactors,corrosionmechanism,measurementofmetalcorrosionrate,corrosionevaluatio
4、nandpredictionofcorrosionarealsodiscussedhere.Keywords.Seabedsediment;corrosionfactor;corrosionmechanism;corrosionevaluation.1.IntroductionSeabedsediment(SBS)corrosionisanimportanttopicinmarineenvironmentcorrosionscience.Intermsofcorrosionlocality,marinee
5、nvironmentcanbedividedintoatmosphericzone,splashzone,tidalzone,immersedzone,andseabedsedimentzone.Generally,itisconsideredthattheseabedsedimentzonehastheleastcorrosiveness(Hou1998).However,somestudieshavevoicedindifferenttoneduetothecomplexityofthecorrosi
6、on.Forexample,thesteelcorrosionvariesinten-timedifferenceindifferentzoneshavingdifferentcorrosionenvironment(Schmide1980).Corrosionunderanaerobicenvironmentcanmakemarinepipesperforated.Developmentinmarineoilexploitationandengineeringincludingmarinecables,
7、steelrigs,pipelinesandothermarinefacilities,isincreasingquicklydemandingdiligentandintegratedinvestigationandresearchoncorrosion.Therefore,scientificsolutionandreferencetocorrosioninmarineoilexploitationflatandseabedpipelinescanbeprovided.Sincethe1980s,ma
8、nysystematicinvestigationshavebeenperformedbysomeresearchers(King1980;Lietal1997).AbriefsummaryoftheadvancementmadeinSBScorrosionstudyispresentedinthispaper.2.SBScorrosionfactorSBSisaspecialsoilbeneathseawater.Itiss
