【英文标准名称】:StandardTestMethodforEvaluatingDegreeofSurfaceDisfigurementofPaintFilmsbyFungalorAlgalGrowth,orSoilandDirtAccumulation
【原文标准名称】:用真菌(真菌类的或藻类的)生长或污物和污垢堆积来评定漆膜表面损坏程度的方法
【标准号】:ASTMD3274-2009e1
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D01.28
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:disfigurement;fungus;mildew;pictorialstandards;Algae;Biodeterioration;Dirtaccumulation/analysis;Fungalinfluence/resistance--paints/relatedcoatings;Microbiologicalexamination--paints/relatedcoatings;Pullulariapullulansspores/hyphae;
【摘要】:Thegrowthoffungiinandonthesurfaceofpaintfilmsrepresentsamajorcauseofdiscolorationordisfigurementofpaintedsurfaces.Becauseoftheirdarkpigmentation,itisfrequentlydifficulttodistinguishfungifromdirtorsoilparticles.UseofPictorialStandards:Thepictorialreferencesthatarepartofthistestmethodareforillustrationpurposesandmaybeusedforvisualcomparisons.Thediagramsrepresentanidealizedschematicofvariousgrowthlevelsonpaintfilms.theyareintendedasarepresentationonly,butwillserveasausefulguidelinetoestablishamountandtypeofgrowth.ThediagramsrepresentedinFig.1arenotderivedfromalinearscale.Thescaleisintendedtoprovideformorediscriminationattheearlierstagesoffungaloralgalgrowth.Itisattheselevelsthatgreaterdiscernmentisnecessary.Comparisonsmadeondarkcoloredsubstrateswillbemuchmoredifficult,andwillthereforerequiremuchmorecareandattention.Itmustbenotedthatbecauseitisdifficulttodistinguishmildfungaloralgalgrowthontheverydarksubstrates,theremaybeatendencytounder-ratethosespecimens.1.1Fungalgrowth,frequentlyreferredtoasmildewinthepaintindustry,causesdefacementofpaintfilmexposedoutdoors.Thevisualratingofpaintsurfacedisfigurementduetofungaloralgalattackisrequiredinordertocomparetheperformanceofdifferentcoatings.1.2Thismethodofratingmildewevaluationisintendedtobeusedonexteriorexposedpaintfilms.Thismethodmaybeusedtorateinteriorfungaloralgalgrowth,butitshouldbenotedthatthegrowthpatternsoninteriorsurfacesaredifferentthanexteriorduetothelackofweatheringinfluences.Itisprimarilyintendedfortestspecimens,butcanalsobesuedforratingmildewgrowthonlargerstructuressuchasentirehouses.Ifthisisusedforlargeareas,theprojectshouldbebrokendownintosmallersections.1.3Thismethodisintendedforfielduseforthemacroratingofsurfacedisfigurementonly.Thevisualscalesaremeanttobeusedbytheunaidedeyetoratealgal,fungal,ordirtdisfigurementonlargersurfaceareassuchastestpanels,sidingboards,orentirebuildings.Techniquesareincludedforthedifferentiationofsoilanddirt.1.4Fungiwillgrowonmostpaintfilmsexposedoutdoorsthatarelocatedinconditionsfavorabletogrowth.TestproceduressuchasPracticesD1006,D3456,andG7areavailabledescribingnaturalexposureteststhatcanbeusedtoexposepaintfilms,inordertocreatefungaloralgalgrowth.1.5Thepictorialreferencesavailableforusewiththistestmethodprovideanumericalbasisforratingthedegreeoffungaloralgalgrowthonpaintfilms.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G50
【国际标准分类号】:87_040
【页数】:8P.;A4
【正文语种】:英语