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【船级社】 DNV-CG-0288.pdf
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【船级社】 DNV-CG-0288.pdf
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CLASS GUIDELINE
DNV-CG-0288 EditionOctober2021
Corrosionprotectionofships
ThecontentofthisservicedocumentisthesubjectofintellectualpropertyrightsreservedbyDNVAS(“DNV”).Theuser
acceptsthatitisprohibitedbyanyoneelsebutDNVand/oritslicenseestoofferand/orperformclassification,certification
and/orverificationservices,includingtheissuanceofcertificatesand/ordeclarationsofconformity,whollyorpartly,onthe
basisofand/orpursuanttothisdocumentwhetherfreeofchargeorchargeable,withoutDNV’spriorwrittenconsent.DNV
isnotresponsiblefortheconsequencesarisingfromanyuseofthisdocumentbyothers.
ThePDFelectronicversionofthisdocumentavailableattheDNVwebsitednv.comistheofficialversion.Ifthere
areanyinconsistenciesbetweenthePDFversionandanyotheravailableversion,thePDFversionshallprevail.
DNVAS
FOREWORD
DNVclassguidelinescontainmethods,technicalrequirements,principlesandacceptancecriteria
relatedtoclassedobjectsasreferredtofromtherules.
©
DNVASOctober2021
Anycommentsmaybesentbye-mailtorules@dnv.com
Thisservicedocumenthasbeenpreparedbasedonavailableknowledge,technologyand/orinformationatthetimeofissuanceofthis
document.TheuseofthisdocumentbyotherpartiesthanDNVisattheuser'ssolerisk.Unlessotherwisestatedinanapplicablecontract,
orfollowingfrommandatorylaw,theliabilityofDNVAS,itsparentcompaniesandsubsidiariesaswellastheirofficers,directorsand
employees(“DNV”)forprovedlossordamagearisingfromorinconnectionwithanyactoromissionofDNV,whetherincontractorintort
(includingnegligence),shallbelimitedtodirectlossesandunderanycircumstancebelimitedto300,000USD.
CHANGES–CURRENT
ThisdocumentsupersedestheMay2017editionofDNVGL-CG-0288.
Thenumberingand/ortitleofitemscontainingchangesishighlightedinred.
ChangesOctober2021
Topic Reference Description
RebrandingtoDNV All ThisdocumenthasbeenrevisedduetotherebrandingofDNV
GLtoDNV.Thefollowinghavebeenupdated:thecompany
name,materialandcertificatedesignations,andreferencesto
otherdocumentsintheDNVportfolio.Someofthedocuments
referredtomaynotyethavebeenrebranded.Ifso,pleasesee
therelevantDNVGLdocument.Notechnicalcontenthasbeen
changed.
Editorialcorrections
Inadditiontotheabovestatedchanges,editorialcorrectionsmayhavebeenmade.
Changes-current
Classguideline—DNV-CG-0288.EditionOctober2021 Page3
Corrosionprotectionofships
DNVAS
CONTENTS
Changes–current.................................................................................................. 3
Section1General....................................................................................................7
1Introduction.........................................................................................7
2Limitations........................................................................................... 7
3Definitions........................................................................................... 8
4Abbreviations.....................................................................................11
Section2Newbuildings–corrosionprotectionofships........................................12
1General.............................................................................................. 12
2Structuraldesign............................................................................... 12
3Planning.............................................................................................12
4Surfacepreparationofunalloyedandlow-alloysteel........................ 13
5Surfacepreparationofcastiron........................................................16
6Surfacepreparationofstainlesssteel............................................... 16
7Surfacepreparationofcopperalloysandofmaterialswithmetallic
coatingsofzincoraluminiummaterials...............................................16
8Protectivecoatings–general............................................................ 17
9Coatingsystemsforballasttanks......................................................18
10Protectivecoatingsystemsforcargooilandsloptanks.................. 20
11Coatingspecificationinvoidspaces................................................ 21
12CoatingspecificationforholdsinbulkcarriersorOBOs...................22
13Coatingformiscellaneousareas...................................................... 22
14Coatingforexternalhull..................................................................23
Section3Maintenanceofcorrosionprotectionsystems....................................... 26
1General.............................................................................................. 26
2Ballasttanksandhullinternals......................................................... 26
3Externalhull...................................................................................... 30
4Assessmentofcoatingcondition(GOOD,FAIR,POOR)......................30
Section4Metalcoatings....................................................................................... 32
1Hotdipgalvanizing............................................................................32
2Thermallysprayedcoatings...............................................................32
Section5Assessmentofcoatingwork................................................................. 34
1General.............................................................................................. 34
2Assessmentprocedure.......................................................................34
Contents
Classguideline—DNV-CG-0288.EditionOctober2021 Page4
Corrosionprotectionofships
DNVAS
3Elementsoftheassessment.............................................................. 34
4Trials,repair...................................................................................... 35
Section6Cathodicprotection............................................................................... 36
1General.............................................................................................. 36
2Cathodicprotectionsystemdesignbasis–internaltanks..................36
3Sacrificialanodes–ballasttanks...................................................... 37
4Sacrificialanodes–cargooiltanks................................................... 38
5Impressedcurrentcathodicprotectionsystems................................ 38
6Cathodicprotectionofexternalhull.................................................. 38
Section7Propertiesandteststandardsforcoatings............................................40
1General.............................................................................................. 40
2Qualitycontroltestsforsteelsurfacetreatmentandcoating
application............................................................................................ 40
3Coatingmaterials'testing–thermal,mechanicalandphysical
properties............................................................................................. 41
Section8Coatinginspector'sduties–checklist................................................... 44
1General.............................................................................................. 44
2Practicalinspectionwork...................................................................44
3Paperwork........................................................................................ 44
4Inspectionequipment........................................................................45
Section9Corrosivityandcorrosionresistantmaterials–abriefreview...............46
1Themarineenvironment–corrosivity...............................................46
2Corrosionmechanismsonsteelsurfacesinships.............................. 46
3Factorsinfluencingsteelcorrosionratesinships.............................. 47
4Stainlesssteels..................................................................................48
5Aluminiumalloys............................................................................... 48
6Copperalloys..................................................................................... 49
7Galvanicseriesofmetalsandalloys..................................................50
8Cargoandballasthandling–designagainstcorrosion...................... 52
Section10Surfaces–preparation,coatingandcorrosion.................................... 53
1General.............................................................................................. 53
Section11References...........................................................................................60
1IMO/IACSdocuments........................................................................ 60
2Standards...........................................................................................61
3DNVdocuments................................................................................. 63
Contents
Classguideline—DNV-CG-0288.EditionOctober2021 Page5
Corrosionprotectionofships
DNVAS
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