ASTM_D_2649_-_20a.pdf

Designation:D264920aStandard Test Method forCorrosion Characteristics of Solid Film Lubricants1This standard is issued under the fixed designation D2649;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 method2covers the evaluation of the galvanicand environmental corrosion interaction characteristics of drysolid film lubricants when in contact with an aluminum surfaceunder conditions of high humidity.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:3B209 Specification for Aluminum and Aluminum-AlloySheet and PlateB308/B308M Specification for Aluminum-Alloy 6061-T6Standard Structural ProfilesD235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)D1730 PracticesforPreparationof AluminumandAluminum-Alloy Surfaces for PaintingD1748 Test Method for Rust Protection by Metal Preserva-tives in the Humidity CabinetD2247 Practice for Testing Water Resistance of Coatings in100%Relative Humidity2.2 U.S.Military Specifications:4MIL-PRF-680 Degreasing SolventMIL-PRF-3043 Resin-Coating,Permanent,for Engine Com-ponents and Metal Parts2.3 Other Standards:5SAE AS5272 Lubricant,Solid Film,Heat Cured,CorrosionInhibiting,Procurement Specification3.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 an aluminum surface,one consisting of friction-reducing powders bonded in tightmatrix to the surface of the metal.4.Summary of Test Method4.1 An aluminum panel having solid film deposited on onesurface is contacted under load with the surface of an unlubri-cated panel.The specimen is subjected to 95%6 3%relativehumidity at 49 C(120 F)for a period of 500 h.After thisperiod,the surface of the unlubricated panel is examined forevidence of corrosion.5.Significance and Use5.1 Surfaces are examined for signs of corrosion.Any signof corrosion is an indication of potential field failure.6.Apparatus6.1 Bolt and Nut,Finished hex bolt,38-24,minimum 19 mm(34in.)long and finished hex nut,38-24.Bolt and nut shall be1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricantsand is the direct responsibility ofSubcommittee D02.L0.05 on Solid Lubricants.Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 1967.Last previous edition approved in 2020 as D2649 20.DOI:10.1520/D2649-20A.2Reference may be made to Military Specification MIL-L-8937(ASG),Jan.22,1963,and Method 3814 of Federal Test Method Standard No.791.3For 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.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.5Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.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.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.made of corrosion-resistant aluminum or stainless steel.Two(2)nuts and two(2)bolts are required.6.2 Channel,made of aluminum alloy 6061T6,conform-ing to Specification B308/B308M,76 mm(3 in.)wide,36 mm(1.41 in.)high,cut to 178 mm(7 in.)long.Holes for the boltsto pass through are drilled on the centerline of the channel25 mm(1 in.)from each end.Two(2)channels