ASTM_D_4585_-_D_4585M_-_13.pdf

Designation:D4585/D4585M13Standard Practice forTesting Water Resistance of Coatings Using ControlledCondensation1This standard is issued under the fixed designation D4585/D4585M;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 basic principles and operatingprocedures for testing water resistance of coatings usingcontrolled condensation.Condensation is produced by expos-ing one surface of a coated specimen to a heated,saturatedmixture of air and water vapor,while the reverse side of thespecimen is exposed to the cooling effect of room temperatureair.This practice is derived from research of the ClevelandSociety for Coatings Technology.21.2 This practice is limited to the methods of obtaining,measuring,and controlling conditions and procedures of con-trolled condensation tests.It does not specify specimenpreparation,specific test conditions,or evaluation of results.NOTE1Alternative practices for testing water resistance of coatingsinclude Practices D870,D1735,and D2247.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 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 determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D609 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint,Varnish,Conversion Coatings,andRelated Coating ProductsD610 Practice for Evaluating Degree of Rusting on PaintedSteel SurfacesD714 Test Method for Evaluating Degree of Blistering ofPaintsD823 Practices for Producing Films of Uniform Thicknessof Paint,Varnish,and Related Products on Test PanelsD870 Practice for Testing Water Resistance of CoatingsUsing Water ImmersionD1654 Test Method for Evaluation of Painted or CoatedSpecimens Subjected to Corrosive EnvironmentsD1730 PracticesforPreparationof AluminumandAluminum-Alloy Surfaces for PaintingD1735 Practice for Testing Water Resistance of CoatingsUsing Water Fog ApparatusD2247 Practice for Testing Water Resistance of Coatings in100%Relative HumidityD2616 Test Method for Evaluation of Visual Color Differ-ence With a Gray ScaleD3359 Test Methods for Measuring Adhesion by Tape TestD3363 Test Method for Film Hardness by Pencil TestD4541 Test Method for Pull-Off Strength of Coatings UsingPortable Adhesion TestersG154 Practice for Operating Fluorescent Ultraviolet(UV)Lamp Apparatus for Exposure of Nonmetallic Materials3.Summary of Practice3.1 Water vapor is generated by heating a pan of water at thebottom of the test chamber.The specimens form the roof orwalls of the test chamber so that the back sides of thespecimens are exposed to the cooling effects of room tempera-ture air.The resulting heat transfer causes vapor to condense onthe test specimens as liquid water saturated with air.1This 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 June 1,2013.Published September 2013.Originallyapproved in 1986.Last previous edition approved in 2007 as D4585 07.DOI:10.1520/D4585_D4585M-13.2Foecking,N.J.,“Cleveland Condensing Type Humidity Cabinet,”OffcialDigest,December 1963,Vol 35,No.467,pp.13181327;and Higgins,W.A.,“Cleveland Condensing Type Humidity Cabinet:II,”Offcial Digest,November1965,Vol 37,No.490,pp.13921404.3For 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 States1 3.2 The temperature and amount of condensate forming onthe specimens is controlled by the test temperature and theroom temperature.The test specimens are inclined so thatcondensate runs off the test surface by gravity and is replacedby fresh condensate in a continuous process during thecondensate cycle.3.3 Exposure conditions are varied by selecting:(a)thetemperature of the test,(b)the duration of the test,and(c)periodic drying of the specimens.Testing may be conducted attemperatures from 38 to 82C 100 to 180F.Any effects suchas color change,blistering,loss of adhesion,s