ASTM_D_2511_-_20.pdf

Designation:D251120Standard Test Method forThermal Shock Sensitivity of Solid Film Lubricants1This standard is issued under the fixed designation D2511;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 U.S.Department of Defense.1.Scope*1.1 This test method covers the measurement of the resis-tance of dry solid film lubricants to deterioration when sub-jected to temperature extremes.1.2 The values stated in SI units are to be regarded as thestandard.The inch-pound units given in parentheses are forinformation only.1.3 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.1.4 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 TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate,Sheet,and Strip(With-drawn 2014)3D2510 Test Method for Adhesion of Solid Film Lubricants2.2 U.S.Federal Specification:P-D-680 Dry Cleaning Solvent43.Terminology3.1 Definitions:3.1.1 lubricant,nany material interposed between twosurfaces that reduces the friction or wear,or both,betweenthem.3.2 Definitions of Terms Specific to This Standard:3.2.1 dry solid film lubricant,non a steel surface,oneconsisting of friction-reducing powders bonded in tight matrixto the surface of the metal.4.Summary of Test Method4.1 A steel panel having the solid film lubricant depositedon one surface is subjected to 260 C(500 F)heat followed byimmediate exposure to 54 C(65 F).The solid film is thenexamined for cracking,flaking,blistering,or other evidence ofthermal instability.5.Significance and Use5.1 Solid lubricant coatings are applied to surfaces that areexposed to heat and cold to such a degree that in many casesliquid lubricants are not practical.Adherence under theseconditions is mandatory to preserve the bearing surfaces duringsliding motion.6.Apparatus6.1 Oven,capable of maintaining a temperature at260 C 6 5.5 C(500 F 6 10 F)and 149 C 6 5.5 C(300 F 6 10 F)(forced circulation).6.2 Sub-Zero Cabinet,capable of maintaining a constanttemperature of 54 C 6 0.5 C(65 F 6 1 F).6.3 Micrometer,reading 0 mm to 25 mm 6 0.0025 mm,(0 in.to 1 in.6 0.0001 in.)with a 1-ball anvil.7.Reagents and Materials7.1 Test Panels,of corrosion-resistant steel,76 mm by152 mm by 0.914 mm(3 in.by 6 in.by 0.036 in.),conformingto Specification A167,No.2D finish,condition annealed.Type321 has proved satisfactory and is generally available.7.2 Dry Cleaning Solvent,conforming to U.S.FederalSpecification P-D-680.8.Sampling,Test Specimens,and Test Units8.1 Have a sufficient quantity of solid film mixture toperform test.Prepare the test panels as follows:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.L0.05 on Solid Lubricants.Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 1966.Last previous edition approved in 2019 as D2511 93(2019).DOI:10.1520/D2511-20.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5098.*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 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.18.1.1 Liquid-degrease the test panels in P-D-680 dry clean-ing solvent and dry them.8.1.2 Apply solid film lubricant to one surface of the testpanel by spraying,or an equivalent technique,to produce a dryfilm thickness of 0.005 mm to 0.013 mm(0.0002 in.to0.0005 in.).8.1.3 In most cases,curing shall be carried out according t