ASTM_D_2649_-_04_2014.pdf

Designation:D264904(Reapproved 2014)Standard 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.Scope1.1 This test method2covers the evaluation of the corrosioncharacteristics of dry solid film lubricants under conditions ofhigh 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 and health practices and determine the applica-bility of regulatory limitations prior to use.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 CabinetD4175 Terminology Relating to Petroleum,PetroleumProducts,and Lubricants2.2 U.S.Military Specifications:4Mil-PRF-3043 Resin-Coating,Permanent(for Internal En-gine Parts)2.3 Government Standard:5P-D-680 Dry Cleaning and Degreasing Solvent3.Terminology3.1 Definitions:3.1.1 lubricant,nany material interposed between twosurfaces that reduces the friction or wear between them(seeTest Method D4175).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 49C(120F)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,minimum19-mm(34-in.)long and finished hex nut,38-24.Bolt and nutshall be made of corrosion-resistant aluminum or stainlesssteel.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 are required.6.3 Humidity Environmental Test Chamber,capable of pro-ducing 95 6 3%relative humidity,49 6 1C(120 6 2F),andconforming to Test Method D1748,Annex A1 on HumidityCabinet Apparatus.1This 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 May 1,2014.Published July 2014.Originally approvedin 1967.Last previous edition approved in 2009 as D264904(2009).DOI:10.1520/D2649-04R14.2Reference 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 Superintendent of Documents,U.S.Government PrintingOffice,Washington,DC 20402.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.4 Torque Wrench,with capacity of 2.8 Nm(25 lbin.).6.5 Micrometer,reading 0 to 25 6 0.002 mm(0 to1 6 0.0001 in.)with a spherical anvil.6.6 Forced-Circulation Oven,capable of maintaining atemperature of 66 6 3C(150 6 5F)and 149 6 5.5C(300 6 10F).7.Reagents and Materials7.1 Panels,made of aluminum alloy 2024,conforming toSpecification B209,76 by 152 by 0.5 mm(3 by 6 by 0.020 in.)thick,anodized in accordance with Practices D1730,Type C,Method 2.NOTE1Other metals and alloys,with other methods of surfacepretreatment,may be used in this test method for special purpose.Suchdeviations shall become a part of the report,10.1.7.2 Dry Cleaning Solvent,conforming to