ASTM D2603-20
Standard Test Method for Sonic Shear Stability of Polymer-Containing Oils

Standard No.

ASTM D2603-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D2603-20

Scope

1.1 This test method covers the evaluation of the shear stability of an oil containing polymer in terms of the permanent loss in viscosity that results from irradiating a sample of the oil in a sonic oscillator. This test method can be useful in predicting the continuity of this property in an oil where no change is made in the base stock or the polymer. It is not intended that this test method serve to predict the performance of polymer-containing oils in service. 1.2 Evidence has been presented that correlation between the shear degradation results obtained by means of sonic oscillation and those obtained in mechanical devices can be poor. This is especially true in the case of automotive engines. Further evidence indicates that the sonic technique may rate different families of polymers in a different order than mechanical devices.2,3 1.3 Because of these limitations, the committee under whose jurisdiction this test method falls has developed alternative shear test methods using a diesel injector nozzle, Test Methods D5275, D6278, and D7109. While those test methods have found some utility in the evaluation of crankcase oils, the stress imparted to the sample has been found to be insufficient to shear polymers of the shear-resistant type found in aircraft hydraulic fluids. 1.4 This test method is used for polymeric additive specifications, especially in the hydraulic fluid market. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 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.

ASTM D2603-20 Referenced Document

• ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
• ASTM D5275 Standard Test Method for Fuel Injector Shear Stability Test (FISST) for Polymer Containing Fluids
• ASTM D6022 Standard Practice for Calculation of Permanent Shear Stability Index
• ASTM D6278 Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus
• ASTM D7042 Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)*， 2021-11-01 Update
• ASTM D7109 Standard Test Method for Shear Stability of Polymer-Containing Fluids Using a European Diesel Injector Apparatus at 30 Cycles and 90 Cycles*， 2022-05-01 Update

ASTM D2603-20 history

• 2020 ASTM D2603-20 Standard Test Method for Sonic Shear Stability of Polymer-Containing Oils
• 2019 ASTM D2603-19 Standard Test Method for Sonic Shear Stability of Polymer-Containing Oils
• 2001 ASTM D2603-01(2013) Standard Test Method for Sonic Shear Stability of Polymer-Containing Oils
• 2001 ASTM D2603-01(2007) Test Method for Sonic Shear Stability of Polymer-Containing Oils
• 2001 ASTM D2603-01 Test Method for Sonic Shear Stability of Polymer-Containing Oils
• 1998 ASTM D2603-98 Test Method for Sonic Shear Stability of Polymer-Containing Oils