ASTM D7356-2007 用氙弧光曝光装置加速汽车透明涂层酸侵蚀的标准试验方法

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【英文标准名称】:StandardTestMethodforAcceleratedAcidEtchWeatheringofAutomotiveClearcoatsUsingaXenon-ArcExposureDevice
【原文标准名称】:用氙弧光曝光装置加速汽车透明涂层酸侵蚀的标准试验方法
【标准号】:ASTMD7356-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D01.27
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:加速的;酸;小客车车身;汽车;蚀刻;曝光;道路车辆;测试;风化
【英文主题词】:acceleratedweathering;acidetch;acidrain;automotive;clearcoats;Jacksonville;xenon-arc
【摘要】:Acidetchdamageisanimportantwarrantyclaimitemforautomotivecompanies.Asaresult,acidetchresistanceisanimportantparameterforautomotiveexteriorcoatings.ThemethoddescribedinthistestmethodhasbeenshowntosimulateacidetchdamageofautomotiveclearcoatsthatoccurswhensuchcoatingsareexposedfromMaythroughmid-AugustinJacksonville,FL.3,5Theacceleratedtestdescribedinthisstandardallowsyear-roundtestingasopposedtothelimitedoutdoorexposuretimeavailablefortheJacksonville,FLexposures.1.1ThistestmethodcoversanacceleratedexposuretestintendedtosimulatedefectsinautomotiveclearcoatscausedbyacidrainthatoccurattheJacksonville,Floridaexposuresite.ExteriorexposuresatanacidraintestlocationinJacksonville,Floridaproduceetchdefectsthatrangefromsmallpitsto12.7mm(0.5in.)indiameterorlargeracid-etchedspots.Thelattertypeofdefectisnotproducedinotheracid-etchteststhatonlyproducepitsthataresmallerthan6.35mm(0.25in.)indiameter.Note1Digitalimagesoftheacidetchdefectsproducedinoutdooracid-rainexposuresandintheacceleratedtestdescribedinthistestmethodarefoundinAppendixX1.1.2Theacceleratedtestdescribedinthistestmethodusesaxenon-arclightsourcewithdaylightfilterconformingtotherequirementsofPracticeG155.Specimensaresprayedwithasimulatedacidrainsolutionandrequirestheuseofahorizontal,flatspecimenarrayinordertoallowtheacidrainsolutiontoremainonthetestspecimensforanextendedperiodoftime.1.3ThereisnoknownISOequivalenttothistestmethod.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:T26
【国际标准分类号】:43_040_60
【页数】:9P.;A4
【正文语种】: