ASTM D5621-07
(Test Method)Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
SIGNIFICANCE AND USE
This test method was developed using Test Method D 2603–91.
This test method permits the evaluation of shear stability with minimum interference from thermal and oxidative factors that may be present in some applications. It has been found applicable to fluids containing both readily sheared and shear-resistant polymers. Correlation with performance in the case of hydraulic applications has been established.
SCOPE
1.1 This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator.
1.2 Evidence has been presented that a good correlation exists between the shear degradation that results from sonic oscillation and that obtained in a vane pump test procedure.
1.3 This test method uses millimetres squared per second (mm2/s), an SI unit, as the unit of viscosity. For information, the equivalent unit, cSt, is shown in parentheses.
1.4 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.
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Designation: D5621 − 07
StandardTest Method for
1
Sonic Shear Stability of Hydraulic Fluids
This standard is issued under the fixed designation D5621; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* and after irradiation are determined by Test Method D445.A
standardreferencefluidcontainingareadilyshearedpolymeris
1.1 This test method covers the evaluation of the shear
run frequently to ensure that the equipment imparts a con-
stability of hydraulic fluids in terms of the final viscosity that
trolled amount of sonic energy to the sample.
results from irradiating a sample of the hydraulic fluid in a
sonic oscillator.
3.2 The conditions to obtain the data for the precision
statement were: 30 mL sample, 12.5 min calibration, and 40
1.2 Evidence has been presented that a good correlation
min sample irradiation at 0°C jacket temperature.
exists between the shear degradation that results from sonic
2
oscillation and that obtained in a vane pump test procedure.
4. Significance and Use
1.3 This test method uses millimetres squared per second
2
(mm /s), an SI unit, as the unit of viscosity. For information, 4.1 This test method was developed using Test Method
D2603–91.
the equivalent unit, cSt, is shown in parentheses.
1.4 This standard does not purport to address all of the
4.2 Thistestmethodpermitstheevaluationofshearstability
safety concerns, if any, associated with its use. It is the
with minimum interference from thermal and oxidative factors
responsibility of the user of this standard to establish appro-
that may be present in some applications. It has been found
priate safety and health practices and determine the applica-
applicable to fluids containing both readily sheared and shear-
bility of regulatory limitations prior to use.
resistant polymers. Correlation with performance in the case of
hydraulic applications has been established.
2. Referenced Documents
3
2.1 ASTM Standards:
5. Apparatus
D445 Test Method for Kinematic Viscosity of Transparent
5.1 Sonic Shear Unit, fixed frequency oscillator and sonic
and Opaque Liquids (and Calculation of Dynamic Viscos-
4
horn.
ity)
D2603 Test Method for Sonic Shear Stability of Polymer-
5.2 Auxiliary Equipment—To facilitate uniform
Containing Oils
performance, the following auxiliary equipment is recom-
D6022 Practice for Calculation of Permanent Shear Stability
mended:
Index
5.2.1 Cooling Bath or Ice Bath, to maintain a jacket
temperature of 0°C.
3. Summary of Test Method
5.2.2 Griffın 50–mL Beaker , borosilicate glass.
3.1 Aconvenient volume of hydraulic fluid is irradiated in a
5.2.3 Sonic-Insulated Box, to enclose the sonic horn to
sonic oscillator for a period of time and the viscosities before
reduce the ambient noise level produced by the sonic shear
unit.
1
This test method is under the jurisdiction of ASTM Committee D02 on
5.3 Viscometer, any viscometer and bath meeting the re-
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
quirements of Test Method D445.
D02.07 on Flow Properties.
Current edition approved Dec. 1, 2007. Published January 2008. Originally
approved in 1994. Last previous edition approved in 2001 as D5621–01. DOI:
10.1520/D5621-07.
2
Stambaugh, R. L., Kopko, R. J., and Roland, T. F., “Hydraulic Pump
Performance—A Basis for Fluid Viscosity Classification”, SAE Paper No. 901633.
Available from Society of Automotive Engineers, 400 Commonwealth Dr.,
Warrendale, PA 15096.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM In the round robin program, equipment from Sonic Systems, Inc., 109 Pheasant
Standards volume information, refer to the standard’s Document Summary page on Run, Newtown, PA 18040 and Heat Systems Ultrasonic, Inc., 1938 New Highway,
the ASTM website. Farmingdale, NY 11735, were found to be satisfactory.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D5621 − 07
6. Reference Fluids
5
6.1 The reference fluid is ASTM Reference Fluid B, a
petroleum oil containing a polymer capable of being broken
5
The sole source of supply of the fluid known to the committee at this time is
RohMax USA, 723 Electronic Drive, Horsham, PA 19044–2228. If you are aware
of alternative suppliers, please provide this information to ASTM International
Headquarters.Your comments will receive careful consideration at a meeting of
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D5621–01 Designation:D5621–07
Standard Test Method for
1
Sonic Shear Stability of Hydraulic Fluids
This standard is issued under the fixed designation D 5621; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results
from irradiating a sample of the hydraulic fluid in a sonic oscillator.
1.2 Evidence has been presented that a good correlation exists between the shear degradation that results from sonic oscillation
2
and that obtained in a vane pump test procedure.
1.3This 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.
1.4This test method uses millimetres squared per second (mm
2
1.3 This test method uses millimetres squared per second (mm /s), an SI unit, as the unit of viscosity. For information, the
equivalent unit, cSt, is shown in parentheses.
1.4 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.
2. Referenced Documents
3
2.1 ASTM Standards:
D 445Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
D2603Test Method for Sonic Shear Stability of Polymer-Containing Oils Test Method for Kinematic Viscosity of Transparent
and Opaque Liquids (and Calculation of Dynamic Viscosity)
D 2603 Test Method for Sonic Shear Stability of Polymer-Containing Oils
D 6022 Practice for Calculation of Permanent Shear Stability Index
3. Summary of Test Method
3.1 A convenient volume of hydraulic fluid is irradiated in a sonic oscillator for a period of time and the change in viscosity
isviscosities before and after irradiation are determined by Test Method D 445. A standard reference fluid containing a readily
sheared polymer is run frequently to ensure that the equipment imparts a controlled amount of sonic energy to the sample.
3.2 The conditions to obtain the data for the precision statement were: 30 mLsample, 12.5 min calibration, and 40 min sample
irradiation at 0°C jacket temperature.
4. Significance and Use
4.1 This test method was developed using Test Method D2603–91. D 2603–91.
4.2 Thistestmethodpermitstheevaluationofshearstabilitywithminimuminterferencefromthermalandoxidativefactorsthat
may be present in some applications. It has been found applicable to fluids containing both readily sheared and shear-resistant
polymers. Correlation with performance in the case of hydraulic applications has been established.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.07 on
Flow Properties.
Current edition approved Aug. 10, 2001. Published September 2001. Originally published as D5621-94. Last previous edition D5621-94.
Current edition approved Dec. 1, 2007. Published January 2008. Originally approved in 1994. Last previous edition approved in 2001 as D 5621–01.
2
Stambaugh, R. L., Kopko, R. J., and Roland, T. F., “Hydraulic Pump Performance—ABasis for Fluid Viscosity Classification”, SAE Paper No. 901633.Available from
Society of Automotive Engineers, 400 Commonwealth Dr., Warrendale, PA 15096.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 05.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5621–07
5. Apparatus
4
5.1 Sonic Shear Unit, fixed frequency oscillator and sonic horn.
5.2 Auxiliary Equipment—To facilitate uniform performance, the following auxiliary equipment is recomm
...
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