ASTM D6278-02
(Test Method)Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus
Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus
SIGNIFICANCE AND USE
This test method evaluates the percent viscosity loss for polymer-containing fluids resulting from polymer degradation in the high shear nozzle device. Thermal or oxidative effects are minimized.
This test method is used for quality control purposes by manufacturers of polymeric lubricant additives and their customers.
This test method is not intended to predict viscosity loss in field service in different field equipment under widely varying operating conditions, which may cause lubricant viscosity to change due to thermal and oxidative changes as well as by the mechanical shearing of polymer. However, when the field service conditions, primarily or exclusively, result in the degradation of polymer by mechanical shearing, there may be a correlation between the results from this test method and results from the field.
SCOPE
1.1 This test method covers the evaluation of the shear stability of polymer-containing fluids. The test method measures the percent viscosity loss at 100ºC of polymer-containing fluids when evaluated by a diesel injector apparatus procedure that uses European diesel injector test equipment. The viscosity loss reflects polymer degradation due to shear at the nozzle.
Note 1-Test Method D 2603 has been used for similar evaluation of shear stability; limitations are as indicated in the significance statement. No detailed attempt has been undertaken to correlate the results of this test method with those of the sonic shear test method.
Note 2-This test method uses test apparatus as defined in CEC L-14-A-93. This test method differs from CEC-L-14-A-93 in the period of time required for calibration.
Note 3-Test Method D5275 also shears oils in a diesel injector apparatus but may give different results.
Note 4-This test method has different calibration and operational requirements than Test Method D 3945.
1.2 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 precautionary statements are given in Section 8.
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An American National Standard
Designation:D6278–02
Standard Test Method for
Shear Stability of Polymer Containing Fluids Using a
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European Diesel Injector Apparatus
This standard is issued under the fixed designation D 6278; 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 D 6299 Practice for Applying Statistical Quality Assurance
Techniques to Evaluate Analytical Measurement System
1.1 This test method covers the evaluation of the shear
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Performance
stability of polymer-containing fluids. The test method mea-
2.2 Coordination European Council (CEC) Standard:
suresthepercentviscositylossat100°Cofpolymer-containing
CEC L-14-A-93 Evaluation of the Mechanical Shear Sta-
fluids when evaluated by a diesel injector apparatus procedure
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bility of Lubricating Oils Containing Polymers
thatusesEuropeandieselinjectortestequipment.Theviscosity
loss reflects polymer degradation due to shear at the nozzle.
3. Terminology
NOTE 1—Test Method D 2603 has been used for similar evaluation of
3.1 Definitions:
shear stability; limitations are as indicated in the significance statement.
3.1.1 kinematic viscosity, n—a measure of the resistance to
Nodetailedattempthasbeenundertakentocorrelatetheresultsofthistest
flow of a fluid under gravity.
method with those of the sonic shear test method.
3.2 Definitions of Terms Specific to This Standard:
NOTE 2—This test method uses test apparatus as defined in CEC
3.2.1 calibration pressure, n—the recorded gage pressure
L-14-A-93.This test method differs from CEC-L-14-A-93 in the period of
time required for calibration.
when calibration fluid RL34 undergoes a viscosity loss of 2.75
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NOTE 3—Test Method D 5275 also shears oils in a diesel injector
to 2.85 mm /s when the recorded gage pressure is within the
apparatus but may give different results.
range of 13.0 to 18.0 MPa.
NOTE 4—This test method has different calibration and operational
3.2.2 viscosity loss, n—the loss in viscosity determined
requirements than Test Method D 3945.
from the difference in kinematic viscosity at 100°C of pre-
1.2 This standard does not purport to address all of the
sheared and post-sheared fluid.
safety concerns, if any, associated with its use. It is the
3.2.3 percent viscosity loss, n—viscosity loss, as defined in
responsibility of the user of this standard to establish appro-
3.2.2, divided by the pre-sheared viscosity, and reported as a
priate safety and health practices and determine the applica-
percent.
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Section 8. 4. Summary of Test Method
4.1 A polymer-containing fluid is passed through a diesel
2. Referenced Documents
injector nozzle at a shear rate that causes polymer molecules to
2.1 ASTM Standards:
degrade. The resultant degradation reduces the kinematic
D 445 Test Method for Kinematic Viscosity of Transparent
viscosity of the fluid under test. The percent viscosity loss is a
and Opaque Liquids (and the Calculation of Dynamic
measure of the mechanical shear stability of the polymer-
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Viscosity)
containing fluid.
D 2603 Test Method for Sonic Shear Stability of Polymer-
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5. Significance and Use
Containing Oils
D 3945 Test Method for Shear Stability of Polymer-
5.1 This test method evaluates the percent viscosity loss for
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Containing Fluids Using a Diesel Injector Nozzle
polymer-containing fluids resulting from polymer degradation
D 5275 Test Method for Fuel Injector Shear Stability Test
in the high shear nozzle device. Thermal or oxidative effects
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(FISST) for Polymer Containing Fluids
are minimized.
5.2 This test method is used for quality control purposes by
manufacturers of polymeric lubricant additives and their cus-
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This test method is under the jurisdiction of ASTM Committee D02 on tomers.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved April 10, 2002. Published June 2002. Originally
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published as D 6278–98. Last previous edition D 6278–98. Annual Book of ASTM Standards, Vol 05.03.
2 5 th
Annual Book of ASTM Standards, Vol 05.01. Available from CEC Secretariat, Madou Plaza, 25 floor, Place Madou 1,
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Annual Book of ASTM Standards, Vol 05.02. B-1210 Brussels, Belgium.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6278–02
NOTE 5—Take great care to avoid damage to the precision parts of the
5.3 This test method is not intended to predict viscosity loss
fuel injection equipment (the p
...
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