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儀器網(wǎng)> 資料庫(kù)>ISO 11507 色漆和清漆 涂層暴露于人工風(fēng)化暴露于熒光紫外燈和水

ISO 11507 色漆和清漆 涂層暴露于人工風(fēng)化暴露于熒光紫外燈和水

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2024-09-30 09:06 2684閱讀次數(shù)

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ISO11507色漆和清漆涂層暴露于人工風(fēng)化暴露于熒光紫外燈和水INTERNATIONALSTANDARDPaintsandvarnishes--Exposureofcoatingstoartificialweathering--ExposuretofluorescentUVlampsandwaterPeinturesetvernis--Expositiondesrevetementsauvieillissementartificiel--ExpositionauraynonnementdelampesafluorescenceUVetaleauForewordISO(theinternationalOrganizatforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part2.ThemaintaskoftechnicalcommitteesistoprepareInternationalStandards.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesorvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastionavote.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ISO11507waspreparedbyTechnicalCommitteeISO/TC35,Paintsandvarnishes,SubcommitteeSC9,Generaltestmethodsforpaintsandvarnishes.Thissecondeditioncancelsandreplacesthefirstedition(ISO11507:1997),whichhasbeentechnicallyrevised.Themainchangesare:--thedataonthelamps(tablesin5.1.2)havebeenharmonizedwiththedatagiveninISO4892-3;--thepurityofthewaterforwettingthetestpanelshasbeenchangedfromgrade2tograde3--conditioningofthecoatedtestpanelspriortotestinghasbeendeleted.IntroductionCoatingsfrompaints,varnishesandsimilarmaterialsareweatheredinthelaboratory,inordertosimulateageingprocessesoccurringduringnaturalweathering.Generally,validcorrelationsbetweenageingduringartificialandnaturalweatheringcannotbeexpectedbecauseofthelargenumberofinfluencingfactors.Certainrelationshipscanonlybeexpectediftheeffectoftheimportantparameters(spectraldistributionoftheirradianceintheirphotochemicallyrelevantrange,temperatureofthespecimen,typeofwetting,wettingcyclerelativehumidity)onthecoatingisknown.However,unlikenaturalweathering,testinginthelaboratoryiscarriedouttakingintoconsiderationalimitednumberofvariableswhichcanbecontrolledandthereforetheresultsaremorereproducible.

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