ASTM_D_7038_-_15.pdf

Designation:D703815Standard Test Method forEvaluation of Moisture Corrosion Resistance of AutomotiveGear Lubricants1This standard is issued under the fixed designation D7038;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.INTRODUCTIONThis test method is written for use by laboratories that use the portions of the test method that refertoASTM Test Monitoring Center(TMC)services(see AnnexA1).Laboratories that choose not to usethe TMC services may simply disregard these portions.The TMC provides reference oils,and engineering and statistical services to laboratories that desireto produce test results that are statistically similar to those produced by laboratories previouslycalibrated by the TMC.In general,the Test Purchaser decides if a calibrated test stand is to be used.Organizations such asthe American Chemistry Council require that a laboratory use the TMC services as part of their testregistration process.In addition,the American Petroleum Institute and the Gear Lubricant ReviewCommittee of the Lubricant Review Institute(SAE International)require that a laboratory use theTMC services in seeking qualification of oils against their specifications.NOTE1The advantage of using the TMC services to calibrate test stands is that the test laboratory(and hence theTest Purchaser)has an assurance that the test stand was operating at the proper level of test severity.It should also beborne in mind that results obtained in a non calibrated test stand may not be the same as those obtained in a test standparticipating in the ASTM TMC services process.1.Scope*1.1 This test method covers a test procedure for evaluatingthe rust and corrosion inhibiting properties of a gear lubricantwhile subjected to water contamination and elevated tempera-ture in a bench-mounted hypoid differential housing assembly.2This test method is commonly referred to as the L-33-1 test.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 Exceptions(1)where there is no direct SI equivalentsuch as screw threads and national pipe threads/diameters,and(2)the values stated in SI units are to be regarded as standardfor the definitions in 12.2,and for SI units where there are nodirect inch-pounds equivalent units.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:3D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 ASTM Standard:2.3 Society of Automotive Engineers Standards:4J308 Information Report on Axle and Manual TransmissionLubricants1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0 on Automotive Lubricants.Current edition approved April 1,2015.Published May 2015.Originallyapproved in 2004.Last previous edition approved in 2014 as D7038 14.DOI:10.1520/D7038-15.2Until the next revision of this test method,the ASTM Test Monitoring Center(TMC)will update changes in this test method by means of Information Letters.This edition includes all Information Letters through 142.Information Letters maybe obtained from the ASTM TMC,6555 Penn Ave.,Pittsburgh,PA 15206-4489,Attention:Administrator.The TMC is also the source of reference oils.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 Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001.*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 States1 J2360 Lubricating Oil,Gear Multipurpose(Metric)MilitaryUse2.4 U.S.Military Specifications:5MIL-PRF-2105E Lubricating Oil,Gear,General Multipur-poseMIL-P-3420F NOX-RUST Paper3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 corrosion,nan alteration of a finished metal surfaceby discoloration,accompanied by roughening not attributableto mechanical action.3.1.2 downtime,nan interruption of power to the test unitfor a period greater than ten seconds.3.1.3 rust,na special case of corrosion,