ASTM_D_4141_-_D_4141M_-_22.pdf

Designation:D4141/D4141M22Standard Practice forConducting Black Box and Solar Concentrating Exposuresof Coatings1This standard is issued under the fixed designation D4141/D4141M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers two accelerated outdoor exposureprocedures for evaluating the exterior weather resistance ofcoatings applied to substrates.1.2 The two procedures are as follows:1.2.1 Procedure ABlack Box Exposure.1.2.2 Procedure CFresnel Reflector Rack Exposure.NOTE1Procedure B described a Heated Black Box procedure that isno longer in common use and has been removed as of the 2014 revisionof this standard.1.3 This standard does not cover all the procedures that areavailable to the user for accelerating the outdoor exposure ofcoatings.Other procedures have been used in order to providea particular effect;however,the two procedures described hereare widely used.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.5 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-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D523 Test Method for Specular GlossD660 Test Method for Evaluating Degree of Checking ofExterior PaintsD661 Test Method for Evaluating Degree of Cracking ofExterior PaintsD662 Test Method for Evaluating Degree of Erosion ofExterior PaintsD714 Test Method for Evaluating Degree of Blistering ofPaintsD772 Test Method for Evaluating Degree of Flaking(Scal-ing)of Exterior PaintsD823 Practices for Producing Films of Uniform Thicknessof Paint,Coatings and Related Products on Test PanelsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD4214 Test Methods for Evaluating the Degree of Chalkingof Exterior Paint FilmsD7091 Practice for Nondestructive Measurement of DryFilm Thickness of Nonmagnetic Coatings Applied toFerrous Metals and Nonmagnetic,Nonconductive Coat-ings Applied to Non-Ferrous MetalsE772 Terminology of Solar Energy ConversionG7 Practice for Natural Weathering of MaterialsG90 Practice for Performing Accelerated Outdoor Weather-ing of Materials Using Concentrated Natural SunlightG113 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 for Natural and Artificial Weathering TestsG169 Guide for Application of Basic Statistical Methods toWeathering Tests1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.27 on Accelerated Testing.Current edition approved Jan.1,2022.Published January 2022.Originallyapproved in 1982.Last previous edition approved in 2014 as D4141/D4141M 14.DOI:10.1520/D4141_D4141M-22.2For 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 Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.Terminology3.1 The definitions given in Terminologies G113 and E772are applicable to this practice.4.Summary of Practice4.1 Two procedures are described that provide accelerationof the degradation that coatings evidence during naturalweathering when exposed on an open rack at a fixed angle.Theprocedures appear in the following order:4.1.1