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ASTM D6278-12e1

(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
5.1 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.  
5.2 This test method is used for quality control purposes by manufacturers of polymeric lubricant additives and their customers.  
5.3 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 100°C 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 D2603 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but may give different results.Note 4—This test method has different calibration and operational requirements than withdrawn Test Method D3945.Note 5—Test Method D7109 is a similar procedure that measures shear stability at both 30 and 90 injection cycles. This test method uses 30 injection cycles only.  
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.

General Information

Status
Historical
Publication Date
31-Oct-2012
ICS
75.160.20 - Liquid fuels
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.07 - Flow Properties
Current Stage
Ref Project

Relations

Replaced By
ASTM D6278-17 - Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus
Effective Date
01-Jan-2017

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ASTM D6278-12e1 - Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector ApparatusASTM D6278-12e1 - Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus
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ASTM D6278-12e1 - Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: D6278 − 12
Standard Test Method for
Shear Stability of Polymer Containing Fluids Using a
1
European Diesel Injector Apparatus
This standard is issued under the fixed designation D6278; 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
ε NOTE—Editorial changes made to 3.2.1 and Section 10 in April 2013.
1. Scope* D2603 Test Method for Sonic Shear Stability of Polymer-
Containing Oils
1.1 This test method covers the evaluation of the shear
D5275 Test Method for Fuel Injector Shear Stability Test
stability of polymer-containing fluids. The test method mea-
(FISST) for Polymer Containing Fluids
suresthepercentviscositylossat100°Cofpolymer-containing
D6299 Practice for Applying Statistical Quality Assurance
fluids when evaluated by a diesel injector apparatus procedure
and Control Charting Techniques to Evaluate Analytical
thatusesEuropeandieselinjectortestequipment.Theviscosity
Measurement System Performance
loss reflects polymer degradation due to shear at the nozzle.
D7109 Test Method for Shear Stability of Polymer Contain-
NOTE 1—Test Method D2603 has been used for similar evaluation of
ing Fluids Using a European Diesel Injector Apparatus at
shear stability; limitations are as indicated in the significance statement.
30 and 90 Cycles
Nodetailedattempthasbeenundertakentocorrelatetheresultsofthistest
3
2.2 Coordination European Council (CEC) Standard:
method with those of the sonic shear test method.
CEC L-14-A-93 Evaluation of the Mechanical Shear Sta-
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
bility of Lubricating Oils Containing Polymers
time required for calibration.
NOTE 3—Test Method D5275 also shears oils in a diesel injector
3. Terminology
apparatus but may give different results.
3.1 Definitions:
NOTE 4—This test method has different calibration and operational
requirements than withdrawn Test Method D3945. 3.1.1 kinematic viscosity, n—a measure of the resistance to
NOTE5—TestMethodD7109isasimilarprocedurethatmeasuresshear
flow of a fluid under gravity.
stability at both 30 and 90 injection cycles. This test method uses 30
3.2 Definitions of Terms Specific to This Standard:
injection cycles only.
3.2.1 calibration pressure, n—the recorded gauge pressure
1.2 This standard does not purport to address all of the
when calibration fluid RL233 undergoes a viscosity loss of 2.7
safety concerns, if any, associated with its use. It is the
2
to 2.9 mm /s when the recorded gauge pressure is within the
responsibility of the user of this standard to establish appro-
range of 13.0 to 18.0 MPa.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific precau- 3.2.2 percent viscosity loss, n—viscosity loss, as defined in
tionary statements are given in Section 8. 3.2.3, divided by the pre-sheared viscosity, and reported as a
percent.
2. Referenced Documents
3.2.3 viscosityloss,n—thelossinviscositydeterminedfrom
2
2.1 ASTM Standards:
the difference in kinematic viscosity at 100°C of pre-sheared
D445 Test Method for Kinematic Viscosity of Transparent
and post-sheared fluid.
and Opaque Liquids (and Calculation of Dynamic Viscos-
4. Summary of Test Method
ity)
4.1 A polymer-containing fluid is passed through a diesel
1
injector nozzle at a shear rate that causes polymer molecules to
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
degrade. The resultant degradation reduces the kinematic
Subcommittee D02.07 on Flow Properties.
viscosity of the fluid under test. The percent viscosity loss is a
Current edition approved Nov. 1, 2012. Published February 2013. Originally
measure of the mechanical shear stability of the polymer-
approved in 1998. Last previous edition approved in 2007 as D6278–07. DOI:
10.1520/D6278-12. containing fluid.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from CEC Secretariat, InterlynkAdministrative Services, Ltd., Lynk
the ASTM website. House, 17 Peckleton Lane, Desford, Leicestershire, LE9 9JU, United Kingdom.
*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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5.1 The tendency of a fuel to vaporize in automotive engine fuel systems is indicated by the vapor-liquid ratio of the fuel.  
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5.1 The boiling range distribution of FAMES provides an insight into the composition of product related to the transesterification process. This gas chromatographic determination of boiling range can be used to replace conventional distillation methods for product specification testing with the mutual agreement of interested parties.  
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1.7 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.  
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5.1 This test method was developed to assess the performance of a heavy-duty engine oil in controlling engine wear under operating conditions selected to accelerate soot production and valve-train wear in a turbocharged and aftercooled four-cycle diesel engine with sliding tappet followers equipped with exhaust gas recirculation hardware.  
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1.2.2 See also A7.1 for clarification; it does not supersede 1.2 and 1.2.1.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A1 for general safety precautions.  
1.4 Table of Contents:    
Section  
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Summary of Test Method  
4  
Significance and Use  
5  
Apparatus  
6  
Engine Fluids and Cleaning Solvents  
7  
Preparation of Apparatus  
8  
Engine/Stand Calibration and Non-Reference Oil Tests  
9  
Test Procedure  
10  
Calculations, Ratings, and Test Validity  
11  
Report  
12  
Precision and Bias  
13  
Annexes  
Safety Precautions  
Annex A1  
Intake Air Aftercooler  
Annex A2  
The Cummins ISB Engine Build Parts Kit  
Annex A3  
Sensor Locations and Special Hardware  
Annex A4  
External Oil System  
Annex A5  
Cummins Service Publications  
Annex A6  
Specified Units and Formats  
Annex A7  
Oil Analyses  
Annex A8  
Alternate Fuel Approval Process  
Annex A9  
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.

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