1、Designation:D789313Standard 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 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.1.Scope1.1 This guide has been written specifically for coil-coatedmetal building products.1.2 This guide applies to preparation
3、,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 t
4、o 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 and health practices and de
5、termine the applica-bility of regulatory limitations prior to use.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 Pra
6、ctice 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
7、 in100%Relative HumidityD2803 Guide for Testing Filiform Corrosion Resistance ofOrganic Coatings on MetalD3359 Test Methods for Measuring Adhesion by Tape TestD4138 Practices for Measurement of Dry Film Thickness ofProtective Coating Systems by Destructive,Cross-Sectioning MeansD4585 Practice for Te
8、sting 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 a
9、nd 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
10、 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 metals
11、ubstrate,coated with a coating system for evaluation,andprepared 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
12、 laboratory-prepared.1This 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 Nov.1,2013.Published November 2013.DOI:10.1520/D7893-13.2For r
13、eferenced 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,P
14、A 15096-0001,http:/www.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 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
15、 in accor-dance with standard practices and methods.4.4 After testing,corrosion is measured in a way that relatesto building performance and allows performance rankingamong samples,for example,by the corrosion creep distancefrom test panel edges.5.Significance and Use5.1 Coil-coated metals are subje
16、cted to a wide range ofenvironmental stresses.Corrosion at cut edges,damage points,and fabricated areas can occur and lead to premature failure.Proper preparation and rating of test panels produces meaning-ful test results that allows comparisons between metal sub-strates and their pretreatments as well as between coatingsystems.5.2 Laboratory-prepared test panels give a relative compari-son of the substrates and coating systems under test,but maynot duplicate all of the stresses imposed on manu