1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 11408:1999 ICS 25.
2、220.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Chemical conversion coatings Black oxide coating on iron and steel Specification and test methodsThis British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was publ
3、ished under the authority of the Standards Committee and comes into effect on 15 November 1999 BSI 11-1999 ISBN 0 580 32995 X BS ISO 11408:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 11408:1999 and implements it as t
4、he UK national standard. The UK participation in its preparation was entrusted to Technical Committee STI/38, Chemical conversion coatings, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpre
5、tation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which
6、implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not
7、purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside fro
8、nt cover, the ISO title page, page ii and iii, a blank page, pages 1 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.A Referencenumbe r ISO11408:1999 (E) INTERNATIONAL STANDARD ISO 11408 Firstedition 19990801 Chemicalconversionco
9、atingsBlack oxidecoatingonironandsteel Specificationandtestmethods CouchesdeconversionchimiqueFinitionnoiredelafonteetdelacier SpcificationsetmthodesdessaiISO11408:1999(E) ii Contents Page 1Scop e1 2Normativereference s1 3Termanddefinitio n.1 4Informationtobesuppliedbythepurchasertothesupplie r2 4.1
10、Essentialinformatio n.2 4.2Additionalinformatio n.2 5Substrat e2 6Heattreatmentofsteel s2 6.1Genera l.2 6.2Heattreatmentbeforeblackoxidizin g3 6.3Heattreatmentafterblackoxidizin g.3 7Requirement s.3 7.1Appearanceandsurfacequalit y.3 7.2Oxalicacidtestresistanc e.3 7.3Resistanceofausteniticstainlessst
11、eelstoneutralsaltspra y3 8Samplin g.3 AnnexA (informative) Processingproceduresforironandstainlesssteels. .6 AnnexB (informative) Methodsoftestforneutralsurfacereactionandforporosityandcontinuit y7 ISO11408:1999(E) iii Foreword ISO (the InternationalOrganizationforStandardization)isaworldwidefederat
12、ionofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentala
13、ndnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsado
14、ptedbythetechnicalcommitteesarecirculatedtoth ememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO11408waspreparedbyTechnica lCommitteeISO/TC107,Metallicandotherinorganic coatings,subcommitteeSC8, Chemicalconv
15、ersioncoatings . AnnexesAandBofthisInternationalStandardareforinformationonly.INTERNATIONALSTANDARD ISO11408:1999(E) 1 ChemicalconversioncoatingsBlackoxidecoatingon ironandsteelSpecificationandtestmethods 1Scope ThisInternationalStandardspecifiesrequirementsforblackoxidecoatingsonironandsteel(includ
16、ingcast and wroughtiron,carbonsteel,lowalloyedsteelandstainlesssteel).Blackoxidecoatingscanbeusedtodiminish frictionbetweenslidingorbearingsurfacesorfordecorativ epurposesortoreducelightreflection.Suchcoatings, withorwithoutsupplementarypreservativetreatment,maybeusedwhereablacksurfaceis required.On
17、lyvery limitedcorrosionprotectionisobtainedundermildlycorrosiveconditionsevenwithpreservativetreatment. ThisInternationalStandarddoesnotspecifyrequirementsforthecondition,finishorsurfac eroughnessofthe substratepriortoblackoxidizing. 2Normativereferences The following normativedocumentscontainprovis
18、ionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentamendmentsto,orrevisionsof ,anyofthese publications do not apply. However, partiestoagreementsbasedonthisInternationalStandardareencouragedto investigatethepossibilityofapplyingthemostr
19、ecenteditionsofthenormativedocumentslistedbelow.Forundated references,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIE Cmaintain registersofcurrentlyvalidInternationalStandards. ISO2064:1996, MetallicandotherinorganiccoatingsDefinitionsandconventionsconcerningthemeasurement
20、ofthickness . ISO4519, MetallicandotherinorganiccoatingsSamplingproceduresforinspectionbyattributes . ISO9227, CorrosiontestsinartificialatmospheresSaltspraytests . ISO9587, MetallicandotherinorganiccoatingsPretreatmentsofironandsteeltoreducetheriskofhydrogen embrittlement. ISO9588, Metallicandother
21、inorganiccoatings Postcoatingtreatmentsofironandsteelforreducingtheriskof hydrogenembrittlement . 3Termanddefinition ForthepurposesofthisInternationalStandard,thefollowingtermanddefinitionapply. 3.1 significantsurface partofthearticlecoveredortobecoveredbythecoatingandforwhichthecoatingisessentialfo
22、rserviceability and/orappearanceandwherethecoatinghastomeetallofthespecifiedrequirements ISO2064:1996,definition3.1ISO11408:1999(E) 2 4Informationtobesuppliedbythepurchasertothesupplier 4.1Essentialinformation When ordering articles to beblackoxidecoatedinaccordancewiththisInternationalStandard,thep
23、urchasershall providethesupplierwiththefollowinginformation: a) thenumberofthisInternationalStandard,i.e.ISO11408; b) thesignificantsurfaceofthearticletobecoated,indicated,for example,onadrawingorbytheprovisionof suitablymarkedsamples; c) thenatureandsurfacecondition(seeclause5)ofthesubstrate; d) th
24、esamplingproceduretobeadopted(seeclause8); e) theappearanceofthecoating,e.g.bytheprovisionofasuitablymarkedsample(see7.1). 4.2Additionalinformation Thefollowingadditionalinformationmaybeprovidedbythepurchaserasappropriate: a) whethertheneutralsurfacereactionhastobetested(seeB.1); b) whetherporositya
25、ndcontinuity(grossdefect)oftheblackoxidecoatinghastobetested(seeB.2); c) anyrequirementsforsupplementarypreservativetreatment(e.g.oil,wax or lacquer films) and humidity testing aftersuchtreatment; d) anyrequirementsforheattreatmentbeforeand/orafterblackoxidizing(seeclause6); e) anyrequirementsforoxa
26、licacidresistancetesting(see7.2); f) anyrequirementsforwearresistanceanditsmeasurement; g) anyrequirementsforcoefficientoffrictionanditsmeasurement; h) anyrequirementsforresistancetoneutralsaltspray(see7.3); i) anyrequirementsforadhesionwiththickerblackoxidecoatings. 5Substrate Thesurfaceroughnessof
27、thecoatingwillbedependentontheinitia lroughnessofthesubstrateandthisshall thereforenotbecauseforrejectionoftheblackoxidecoating. 6Heattreatmentofsteels 6.1General Heat treatment may be required for certain steelgradestoreducetheriskofcrackingbyhydrogenembrittlementor causticbrittleness. CAUTION High
28、strengthsteel,oftensil estrengthR m 1 000MPa,maybesubjectedtocausticembrittlement thatcouldleadtospontaneouscrackingunderinternalorappliedstressduringtheblackoxidizingprocess. ISO11408:1999(E) 3 6.2Heattreatmentbeforeblackoxidizing PretreatmentshallbecarriedoutinaccordancewithISO 9587.Theheattreatme
29、n tshallbecarriedoutbeforethe commencementofanypreparationorcleaningtreatmentusingaqueoussolutions. 6.3Heattreatmentafterblackoxidizing Postcoatingtreatmentshallbecarriedoutinaccordancewit hISO9588.Surfacehardenedpartsshallbeheat treatedatatemperaturebetween190Cand220 Cfornotlessthan2h. 7Requirement
30、s 7.1Appearanceandsurfacequality Thecoatingshallbefreeofspotsofredoxideandshallnotbeanoverallreddishbrowncolour.Whenapartis wipedwithacleanWhatman40filterpaper(orotherfilterpaperofequivalentquality)priortoapplicationofany supplementarypreservativetreatment,itshallproducenoreddishbrownorgreensmut. NO
31、TE Nonuniformityofcolourandhazeisper missibleonpartsthatarelocallyhardened,welded,ce mented,rivetedor submittedtootherkindsofmechanicaltreatment. 7.2Oxalicacidtestresistance 7.2.1 Whentestedinaccordancewith7.2.2priortotheapplicationofanysupplementarypreservativetreatment, theblackoxidecoatingonapart
32、shallconformtoFigure3. 7.2.2 Dissolve 50 g oxalic acidin 1 lofdistilledordeionizedwater.Placethre e drops( ;0,2ml) of the solution on a flat spot of the black oxidecoatedsurfaceatambienttemperature.Thereactionshouldoccurafter3 0 sandwithin 8min.After8minrinseanddrythesurfaceandcompareittoFigures1to3
33、. 7.3Resistanceofausteniticstainlesssteelstoneutralsaltspray Whentestedusingthesaltspraytest(NSStest)inaccordancewithISO9227,thesignificantsurface,withoutany supplementarypreservativecoating,shallwithstand96hwithoutdisplayingtracesofcorrosion(rust). 8Sampling ArandomsampleofthesizerequiredbyISO 4519
34、shallbeselectedfromtheinspectionlot.Thearticlesinthe sampleshallbeinspectedforconformancetothisInternationalStandardandthelotshal lbeclassifiedas conformingornotconformingtoeachrequirementaccordingtothecriteriaofthesamplingplansinISO4519.ISO11408:1999(E) 4 Figure1Poorqualitycoating Figure2Borderline
35、qualitycoating ISO11408:1999(E) 5 Figure3GoodqualitycoatingISO11408:1999(E) 6 AnnexA (informative) Processingproceduresforironandstainlesssteels TableA.1Typicalprocessingproceduresforsteelsandstainlesssteels Ironandsteel grades Processand suitablechemicals Processing temperature Immersiontime C min
36、Carbonsteels,low alloysteels,wrought irons,castirons Alkalineoxidizing: NaOH,NaNO 3 ,water Processingtank a boilingat130to150 15to60 Martensiticstainless steeltemperedat lessthan480 C Alkalinechromate: NaOH,NaNO 3 , Na 2 Cr 2 O 7 115to125 30to45 Martensiticstainless steeltemperedat 480 Corhigher Fus
37、edsalt;oxidizing: Na 2 Cr 2 O 7 and/or K 2 Cr 2 O 7 Moltensaltbath400 to455 30 Stainless b steels (ferriticand austenitic) Alkalineoxidizing a Subsequenttanks,ifused,are madefro mth e same chemicals at increased concentrations relative totheprevioustank. b Lessthan8%nickel. TableA.2Differentgradesof
38、stainlesssteels Stainlesssteelgrades Nickelcontent % Hardenability Ferritic Nonhardenable Martensitic 2,5 Hardenable Ferriticaustenitic 4,5to7 Nonhardenable Austenitic 7to26 Nonhardenable ISO11408:1999(E) 7 AnnexB (informative) Methodsoftestforneutralsurfacereactionandforporosityandcontinuity B.1Neu
39、tralsurfacereaction Thetestshallbecarriedoutafterthelastrinsinganddrying,butbefor etheoiling.Phenolphthaleintestsolutionor phenolphthaleinindicatorpapershallbeusedasfollows. a) Preparephenolphthaleintestsolutionbydissolving 2 gofphenolphthaleinin10 0 mlofethanolandkeepthe solutioninaglassdroppingbot
40、tle.Place1to2dropsofthetest solutiononthesurfacetobetested(joints, cavities). b) Moistenthephenolphthaleinindicatorpaperwithdistilledwaterandplacethispaper onthesurfacetobe tested. Residualalkalisshallbedeemedtobepresentifthephenolphthalei n drops or indicator paper (as appropriate) turn arosecolour
41、. B.2Porosityandcontinuityoftheblackoxidecoating Thetestshallbeconductedbyimmersion(a)orusingdroplets(b). Ensure that eachtestusesafreshtestsolutionpreparedfromlaboratoryreagentgradeCuSO 4 atamassfraction of3%. a) Immerse the specimen in the test solution (ina glass or plastic bottle) at a temperatu
42、re of 15 C to 20 C.After 30sremovethespecimen,rinseitusingcoldwateranddryitusingfilterpaper. b) Placethree dropsofthetestsolutiononthesurfacetobetested.After3 0 sremovethedropsusingfilter paper. Examinethesurfaceundernormalcorrectedvision.Redpointsorspotsshallbedeemedtoindicateth epresence ofporesor
43、thatthecoatingisdamaged.BS ISO 11408:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
44、 | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest
