ASTM International - ASTM D7528-17
Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus
|Publication Date:||1 May 2017|
|ICS Code (Lubricants, industrial oils and related products):||75.100|
significance And Use:
5.1 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... View More
5.1 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.
5.2 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 D7320) engine tests, respectively.
5.3 This bench test procedure has potential use in specifications and classifications of engine lubricating oils, such as Specification D4485.View Less
1.1 This test method describes a bench procedure to simulate the oil aging encountered in Test Method D7320, 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 D7320.
1.2 Units-The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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:
|Summary of Test Method||4|
|Significance and Use||5|
|Reagents and Materials||7|
|Reference Oil Testing and Test Stand Calibration||9|
|Calculations and Determination of Test Results||12|
|Precision and Bias||14|
|Reaction Vessel||Annex A1|
|Reaction Vessel Head||Annex A2|
|Reaction Vessel-to-Head Seal||Annex A3|
|Agitator Turbine Blade||Annex A4|
|Agitator Packing Gland||Annex A5|
|Nitrogen Dioxide Graduated Tube||Annex A6|
|Vacuum System Plumbing||Annex A7|
|Vacuum Trap Condensers||Annex A8|
|Setting the Vacuum Control Valve||Annex A9|
|Sample Preparation and Addition||Appendix X1|
|Charging the Liquid Nitrogen Dioxide||Appendix X2|
|Nitrogen Dioxide Precision Needle Valve||Appendix X3|
|Example of an Assembled ROBO Apparatus||Appendix X4|
|Information Package to Aid Setting Up a New Robo Apparatus||Appendix X5|
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.