ASTM_D_1654_-_08.pdf

Designation:D165408Standard Test Method forEvaluation of Painted or Coated Specimens Subjected toCorrosive Environments1This standard is issued under the fixed designation D1654;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This test method covers the treatment of previouslypainted or coated specimens for accelerated and atmosphericexposure tests and their subsequent evaluation in respect tocorrosion,blistering associated with corrosion,loss of adhesionat a scribe mark,or other film failure.1.2 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 purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of whoever uses this standard to consult andestablish appropriate safety and health practices and deter-mine the applicability 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 ofPaintsD822 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of Paint and Related CoatingsD870 Practice for Testing Water Resistance of CoatingsUsing Water ImmersionD1014 Practice for Conducting Exterior Exposure Tests ofPaints and Coatings on Metal SubstratesD1735 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 MetalD4141 Practice for Conducting Black Box and Solar Con-centrating Exposures of CoatingsD4585 Practice for Testing Water Resistance of CoatingsUsing Controlled CondensationD4587 Practice for Fluorescent UV-Condensation Expo-sures of Paint and Related CoatingsD5894 Practice for Cyclic Salt Fog/UV Exposure of PaintedMetal,(Alternating Exposures in a Fog/Dry Cabinet and aUV/Condensation Cabinet)D6695 Practice for Xenon-Arc Exposures of Paint andRelated CoatingsD7087 Test Method for An Imaging Technique to MeasureRust Creepage at Scribe on Coated Test Panels Subjectedto Corrosive EnvironmentsE3 Guide for Preparation of Metallographic SpecimensG85 Practice for Modified Salt Spray(Fog)TestingG87 Practice for Conducting Moist SO2Tests2.2 ANSI Standard:3B94.50 Single-Point Cutting Tools,Basic Nomenclature andDefinitions for3.Terminology3.1 paint removal material,na device or substance that isused to remove loose coating around a scribe.3.2 rust creepage or undercutting,ncorrosion of a sub-strate that occurs around a damaged area of a coated material.3.3 scribe,na linear,intentionally prepared damaged areaon a coated material that extends down to the substrate.3.4 scribing tool,na tool used to prepare a scribe on acoated material.3.5 zone of corrosion,narea of corrosion of a substrate.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.25 on Evaluation of Weathering Effects.Current edition approved Nov.1,2008.Published December 2008.Originallyapproved in 1959.Last previous edition approved in 2005 as D1654 05.DOI:10.1520/D1654-08.2For 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 American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 This method provides a means of evaluating and com-paring basic corrosion performance of the substrate,pretreat-ment,or coating system,or combination thereof,after exposureto corrosive environments.5.Apparatus5.1 Scribing Tools:5.1.1 Lathe Tool TypeHigh speed tool steel or tungstencarbide thread cutting lathe tool bit with a cutting tip having a60 included angle.ANSI B94.50,Style E has been found tomeet these requirements.(See Fig.1.)The tool bit is typicallymounted in a holder such as a wooden file handle to facilitatethe scribing operation.5.1.2 Pencil TypePencil shaped device,with a high speedtool steel or tungsten carbide scribing tip.Typically thegripping surface is knurled.The tip may be replaceable orpermanent.5.1.3 Motorized Circular BladeA motor fitted with a 1 to2 mm wide circular cutting device.5.1.4 Other TypesOther types of scribing instrum