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ASTM D7528-09

Historical Revision

Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus

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1.1 This test method describes a bench procedure to simulate the oil aging encountered in Test Method D 7320, the Sequence IIIG engine test method. These aged oils are then tested for kinematic viscosity and for low-temperature pumpability properties as described in the Sequence IIIGA engine test, Appendix X1 of Test Method D 7320.

1.2 UnitsThe values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.2.1 ExceptionsThere are no SI equivalents for some apparatus in Section 6, and there are some figures where inch units are to be regarded as standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given in Sections 7 and 8.

1.4 This test method is arranged as follows:

Section
Scope1
Reference Documents2
Terminology3
Summary of Test Method4
Significance and Use5
Apparatus6
Reagents and Materials7
Hazards8
Reference Oil Testing and Test Stand Calibration9
Procedure10
Cleaning11
Calculations and Determination of Test Results12
Report13
Precision and Bias14
Keywords15
Annexes
Reaction VesselAnnex A1
Reaction Vessel HeadAnnex A2
Reaction Vessel-to-Head SealAnnex A3
Agitator Turbine BladeAnnex A4
Agitator Packing GlandAnnex A5
Nitrogen Dioxide Graduated TubeAnnex A6
Vacuum System PlumbingAnnex A7
Vacuum Trap CondensersAnnex A8
Setting the Vacuum Control ValveAnnex A9
Appendixes
Sample Preparation and AdditionAppendix X1
Charging the Liquid Nitrogen DioxideAppendix X2
Nitrogen Dioxide Precision Needle ValveAppendix X3
Example of an Assembled ROBO ApparatusAppendix X4
Information Package to Aid Setting Up a New Robo ApparatusAppendix X5

This bench test method is intended to produce comparable oil aging characteristics to those obtained with ASTM TMC Sequence IIIGA matrix reference oils 434, 435 and 438 after aging in the Sequence IIIG engine test.

To the extent that the method generates aged oils comparable to those from the Sequence IIIG engine test, the measured increases in kinematic and MRV viscosity indicate the tendency of an oil to thicken because of volatilization and oxidation, as in the Sequence IIIG and IIIGA (see Appendix X1 in Test Method D 7320) engine tests, respectively.

This bench test procedure has potential use in specifications and classifications of engine lubricating oils, such as Specification D 4485.

SDO ASTM: ASTM International
Document Number D7528
Publication Date April 15, 2009
Language en - English
Page Count 20
Revision Level 09
Supercedes
Committee D02.B0.07
Publish Date Document Id Type View
April 1, 2022 D7528-22 Revision
Jan. 1, 2021 D7528-21 Revision
Oct. 1, 2017 D7528-17A Revision
May 1, 2017 D7528-17 Revision
May 1, 2013 D7528-13 Revision
April 15, 2009 D7528-09 Revision