1、Designation:D256599(Reapproved 2008)Standard Practice forXenon-Arc Exposure of Plastics Intended for OutdoorApplications1This standard is issued under the fixed designation D2565;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the ye
2、ar of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice covers specific pr
3、ocedures and test condi-tions that are applicable for xenon-arc exposure of plasticsconducted in accordance with Practices G151 and G155.Thispractice also covers the preparation of test specimens,the testconditions best suited for plastics,and the evaluation of testresults.NOTE1Previous versions of
4、this practice referenced xenon-arcdevices described in Practice G26,which described very specific equip-ment designs.Practice G26 is being replaced by Practice G151,whichdescribes performance criteria for all exposure devices that use laboratorylight sources and by Practice G155,which gives requirem
5、ents forexposing nonmetallic materials in xenon-arc devices.Practice G26 will beballoted for withdrawal before December 2000.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-
6、priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE2This practice is technically equivalent to ISO 4892-2.2.Referenced Documents2.1 ASTM Standards:2D1293 Test Methods for pH of WaterD3980 Practice for Interlaboratory Testing of Paint andRel
7、ated Materials(Withdrawn 1998)3D5870 Practice for Calculating Property Retention Index ofPlasticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG26 Practice for Operating Light-Exposure Apparatus(Xenon-Arc Type)With and Without Water for Exposureof No
8、nmetallic Materials(Discontinued 2001)(With-drawn 2000)3G113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic MaterialsG141 Guide for Addressing Variability in Exposure Testingof Nonmetallic MaterialsG147 Practice for Conditioning and Handling of Nonmetal-lic Materials
9、 for Natural and Artificial Weathering TestsG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use Laboratory Light SourcesG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 ISO Standard:4ISO 4892-2 PlasticsMethods of Exposur
10、e to LaboratoryLight Sources Part 2,Xenon Arc Lamp3.Terminology3.1 The definitions in Terminology G113 are applicable tothis practice.4.Significance and Use4.1 The ability of a plastic material to resist deterioration ofits electrical,mechanical,and optical properties caused byexposure to light,heat
11、,and water can be very significant formany applications.This practice is intended to induce propertychanges associated with end-use conditions,including theeffects of daylight,moisture,and heat.The exposure used inthis practice is not intended to simulate the deterioration causedby localized weather
12、 phenomena,such as,atmosphericpollution,biological attack,and saltwater exposure.4.2 CautionVariations in results may be expected whenoperating conditions are varied within the accepted limits ofthis practice.Therefore,all references to the use of this practicemust be accompanied by a report prepare
13、d in accordance withSection 9 that describes the specific operating conditions used.1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.50 on Durability of Plastics.Current edition approved March 1,2008.Published April 2008.Or
14、iginallyapproved in 1966.Last previous edition approved in 1999 as D2565-99.DOI:10.1520/D2565-99R08.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Documen
15、t Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C70
16、0,West Conshohocken,PA 19428-2959.United States1 Refer to Practice G151 for detailed information on the caveatsapplicable to use of results obtained in accordance with thispractice.NOTE3Additional information on sources of variability and onstrategies for addressing variability in the design,execution,and dataanalysis of laboratory-accelerated exposure tests is found in Guide G141.4.3 Reproducibility of test results between laboratories hasbeen shown to be good when the stability of materials is