ASTM_D_7893_-_13_2018.pdf

Designation:D789313(Reapproved 2018)Standard Guide forCorrosion Test Panel Preparation,Testing,and Rating ofCoil-Coated Building Products1This standard is issued under the fixed designation D7893;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year 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.1.Scope1.1 This guide has been written specifically for coil-coatedmetal building products.1.2 This guide applies to preparation,testing,and rating ofline-coated and laboratory-coated test panels for the purpose ofcomparing and ranking the panels for corrosion resistance andother related properties.1.3 Testing may include accelerated laboratory corrosiontests and outdoor exposure tests.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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:2B117 Practice for Operating Salt Spray(Fog)ApparatusD610 Practice for Evaluating Degree of Rusting on PaintedSteel SurfacesD714 Test Method for Evaluating Degree of Blistering ofPaintsD870 Practice for Testing Water Resistance of CoatingsUsing Water ImmersionD1654 Test Method for Evaluation of Painted or CoatedSpecimens Subjected to Corrosive EnvironmentsD1735 Practice for Testing Water Resistance of CoatingsUsing Water Fog ApparatusD2247 Practice for Testing Water Resistance of Coatings in100%Relative HumidityD2803 Guide for Testing Filiform Corrosion Resistance ofOrganic Coatings on MetalD3359 Test Methods for Rating Adhesion by Tape TestD4138 Practices for Measurement of Dry Film Thickness ofProtective Coating Systems by Destructive,Cross-Sectioning MeansD4585 Practice for Testing Water Resistance of CoatingsUsing Controlled CondensationD5796 Test Method for Measurement of Dry Film Thicknessof Thin-Film Coil-Coated Systems by Destructive MeansUsing a Boring DeviceD5894 Practice for Cyclic Salt Fog/UV Exposure of PaintedMetal,(Alternating Exposures in a Fog/Dry Cabinet and aUV/Condensation Cabinet)D7091 Practice for Nondestructive Measurement of DryFilm Thickness of Nonmagnetic Coatings Applied toFerrous Metals and Nonmagnetic,Nonconductive Coat-ings Applied to Non-Ferrous MetalsG7 Practice for Atmospheric Environmental Exposure Test-ing of Nonmetallic MaterialsG85 Practice for Modified Salt Spray(Fog)TestingG87 Practice for Conducting Moist SO2TestsG169 Guide for Application of Basic Statistical Methods toWeathering Tests2.2 SAE Standards:3J2334 Laboratory Cyclic Corrosion Test3.Terminology3.1 Definitions:3.1.1 test panel,na representative specimen of metalsubstrate,coated with a coating system for evaluation,and1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.53 on Coil Coated Metal.Current edition approved June 1,2018.Published June 2018.Originallyapproved in 2013.Last previous edition approved in 2013 as D7893 13.DOI:10.1520/D7893-13R18.2For 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.3Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/www.sae.org.Copyright 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.1 prepared in a way that allows measurement of environmentaldegradation,especially corrosion,for system performancecomparisons and ranking.4.Summary of Guide4.1 Test panels may be collected from coil line clips andformed building panels,or may be laboratory-prepared.4.2 Test panels are prepared for testing in a specific con-figuration that simulates conditions on buildings.4.3 Test panels are exposed to specific conditions in accor-dance with standard practices and methods.4.4 Afte