ASTM_D_7528_-_13.pdf

Designation:D752813Standard Test Method forBench Oxidation of Engine Oils by ROBO Apparatus1This standard is issued under the fixed designation D7528;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.INTRODUCTIONAny properly equipped laboratory,without outside assistance,can use the procedure described inthis test method.However,the ASTM Test Monitoring Center2(TMC)provides reference oils and anassessment of the test results obtained on those oils by the laboratory.By these means,the laboratorywill know whether its use of the test method gives results statistically similar to those obtained byother laboratories.Furthermore,various agencies require that a laboratory utilize the TMC services inseeking qualification of oils against specifications.For example,the U.S.Army imposes such arequirement in connection with several Army engine lubricating oil specifications.Accordingly,this test method is written for use by laboratories that utilize the portions of the testmethod that refer to the TMC services.Laboratories that choose not to use the TMC services maysimply ignore these portions.This test method may be modified by means of information letters issued by the TMC.In addition,the TMC may issue supplementary memoranda related to the method.1.Scope*1.1 This test method describes a bench procedure to simu-late the oil aging encountered in Test Method D7320,theSequence IIIG engine test method.These aged oils are thentested for kinematic viscosity and for low-temperature pump-ability properties as described in the Sequence IIIGA enginetest,Appendix X1 of Test Method D7320.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.2.1 ExceptionsThere are no SI equivalents for someapparatus in Section 6,and there are some figures where inchunits are to be regarded as standard.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.Specific warningstatements are given in Sections 7 and 8.1.4 This test method is arranged as follows:SectionScope1Reference Documents2Terminology3Summary of Test Method4Significance and Use5Apparatus6Reagents and Materials7Hazards8Reference Oil Testing and Test Stand Calibration9Procedure10Cleaning11Calculations and Determination of Test Results12Report13Precision and Bias14Keywords15AnnexesReaction VesselAnnex A1Reaction Vessel HeadAnnex A2Reaction Vessel-to-Head SealAnnex A3Agitator Turbine BladeAnnex A4Agitator Packing GlandAnnex A5Nitrogen Dioxide Graduated TubeAnnex A6Vacuum System PlumbingAnnex A7Vacuum Trap CondensersAnnex A8Setting the Vacuum Control ValveAnnex A9AppendixesSample Preparation and AdditionAppendix X1Charging the Liquid Nitrogen DioxideAppendix X2Nitrogen Dioxide Precision Needle ValveAppendix X3Example of an Assembled ROBO ApparatusAppendix X41This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0.07 on Development and Surveillance of Bench TestsMethods.Current edition approved May 1,2013.Published June 2013.Originallyapproved in 2009.Last previous edition approved in 2009 as D7528 09.DOI:10.1520/D7528-13.2ASTM Test Monitoring Center,6555 PennAvenue,Pittsburgh,PA15206-4489.www.astmtmc.cmu.edu.*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 SectionInformation Package to Aid Setting Up a New Robo ApparatusAppendix X52.Referenced Documents2.1 ASTM Standards:3D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D4175 Terminology Relating to Petroleum,PetroleumProducts,and LubricantsD4485 Specification for Performance of Active API ServiceCategory Engine OilsD4684 Test Method for Determination of Yield Stress andApparent Viscosity of Engine Oils at Low TemperatureD5293 Test Method for Apparent Viscosity of Engine Oilsand Base Stocks Between 5 C and 35 C UsingCold-Cranking SimulatorD7320 Test Method for Evaluation of Automotive EngineOils in the Sequence IIIG,Spark-Ignition Engine2.2 SAE Standard:4SAE J300 Engine Oil Viscosity Classification3.Terminology3.1 Definitions:3.1.1 candidate oil,nan oil that is intended to have theperformance characteristics necessary to satisfy a specificationand is to be tested against that specification.D41753.1.2 reference oil,nan oil of known performancecharacteristics,used as a basis for comparison.3.1.2.1 Discussio