1、Designation:D248518Standard Test Methods forEvaluating Coatings For High Temperature Service1This standard is issued under the fixed designation D2485;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 These test methods cover the evaluation of the heat-resistant properties of coatings designed to protect steel sur-faces exposed to elevated tem
3、peratures during their servicelife.Two test methods are described as follows:Method AInterior Service CoatingsMethod BExterior Service Coatings1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purpor
4、t to address the safetyconcerns,if any,associated with its use.It is the responsibilityof whoever uses this standard to consult and establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazard statements are
5、given in Section 5.1.4 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 Te
6、chnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A36/A36M Specification for Carbon Structural SteelA283/A283M Specification for Low and Intermediate Ten-sile Strength Carbon Steel PlatesA285/A285M Specification for Pressure Vessel Plates,Car-bon Steel,Low-and Intermed
7、iate-Tensile StrengthB117 Practice for Operating Salt Spray(Fog)ApparatusD522 Test Methods for Mandrel Bend Test of AttachedOrganic CoatingsD609 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint,Varnish,Conversion Coatings,andRelated Coating ProductsD823 Practices for Producing F
8、ilms of Uniform Thicknessof Paint,Varnish,and Related Products on Test PanelsD1186 Test Methods for Nondestructive Measurement ofDry Film Thickness of Nonmagnetic Coatings Applied toa Ferrous Base(Withdrawn 2006)3D2200 Practice for Use of Pictorial Surface PreparationStandards and Guides for Paintin
9、g Steel SurfacesG7 Practice for Atmospheric Environmental Exposure Test-ing of Nonmetallic Materials3.Summary of Test Methods3.1 Panels suitably coated with the material under test areevaluated under one or both of two test methods depending onthe intended usage.3.1.1 Test Method A,Interior Service
10、CoatingsCoatedpanels are heated for 24 h in a muffle furnace at a temperatureagreed upon between the purchaser and the seller.One panel isplunged into water and the other cooled and then subjected toa bend test.3.1.2 Test Method B,Exterior Service CoatingsCoatedpanels are subjected to temperatures t
11、hat increase in steps from205 to 425C(400 to 800F).One panel is subjected to saltspray for 24 h,and one is exposed outdoors for 12 months.3.2 When tests are completed,the panels are examined forevidence of film degradation including rust formation,blistering,loss of adhesion,dulling,and chalking.4.S
12、ignificance and Use4.1 Some coating systems are developed for use over steelthat is exposed to high temperatures during service life.Thismethod provides an accelerated means of determining theperformance of these coating systems.Testing of coatingsdesigned for interior service,and of coatings design
13、ed forexterior(weather-exposed)service is included.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.27 on Accelerated Testing.Current edition approved March 1,2018.Publish
14、ed March 2018.Originallyapproved in 1966.Last previous edition approved in 2013 as D2485 91(2013).DOI:10.1520/D2485-18.2For 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 th
15、e standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*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.Uni
16、ted 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 5.Apparatus5.1 Automatic spray equipment as described in PracticesD823(Method A)or any other suitable method that will givethe required uniformity of film and film thickness.
