ASTM D6895-06

Standard Test Method for Rotational Viscosity of Heavy Duty Diesel Drain Oils at 100°C

SIGNIFICANCE AND USE
Rotational viscosity measurements allow the determination of the non-Newtonian, shear thinning property of drain oil. Rotational viscosity values can be compared at a shear rate of 100 s-1 by this test method.2 ,3
SCOPE
1.1 This test method covers the determination of the rotational viscosity and the shear thinning properties of heavy duty diesel engine drain oils at 100C, in the shear rate range of approximately 10 to 300 s-1, in the shear stress range of approximately 0.1 to 10 Pa and the viscosity range of approximately 12 to 35 mPas. Rotational viscosity values can be compared at a shear rate of 100 s-1 by this test method.,
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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2006
• ICS: 75.080 - Petroleum products in general
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.07 - Flow Properties

Relations

• Replaces: ASTM D6895-03e1 - Standard Test Method for Rotational Viscosity of Heavy Duty Diesel Drain Oils at 100°C
• Effective Date: 01-Nov-2006
• Replaced By: ASTM D6895-06(2012) - Standard Test Method for Rotational Viscosity of Heavy Duty Diesel Drain Oils at 100°C
• Effective Date: 01-Nov-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: D6895 − 06
StandardTest Method for
Rotational Viscosity of Heavy Duty Diesel Drain Oils at
1
100°C
This standard is issued under the fixed designation D6895; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 maximum point time—instrument setting that limits
the amount of time the instrument will maintain a constant
1.1 This test method covers the determination of the rota-
shear stress or shear rate before accepting the value as the
tionalviscosityandtheshearthinningpropertiesofheavyduty
equilibrium value.
diesel engine drain oils at 100°C, in the shear rate range of
-1 3.1.2 rate index—the exponent, c, in these expressions
approximately 10 to 300 s , in the shear stress range of
relating shear rate and shear stress:
approximately 0.1 to 10 Pa and the viscosity range of approxi-
c
shearstress 5 b~shearrate! (1)
mately 12 to 35 mPa·s. Rotational viscosity values can be
-1 2,3
compared at a shear rate of 100 s by this test method.
ln shearstress 5lnb1cln shearrate (2)
~ ! ~ !
3.1.2.1 Discussion—A rate index of c = 1 signifies Newto-
1.2 This standard does not purport to address all of the
nian fluid behavior. Values less than one indicate increasing
safety concerns, if any, associated with its use. It is the
3
non-Newtonian, shear thinning behavior.
responsibility of the user of this standard to establish appro-
3.1.3 rotational viscosity—the viscosity obtained by use of
priate safety and health practices and determine the applica-
this test method.
bility of regulatory limitations prior to use.
3.1.4 VIS100 DEC—rotational viscosity at shear rate of 100
-1
s , decreasing shear stress or shear rate sweep.
2. Referenced Documents
4
3.1.5 VIS100 INC—rotational viscosity at shear rate of 100
2.1 ASTM Standards:
-1
s , increasing shear stress or shear rate sweep.
D4057Practice for Manual Sampling of Petroleum and
Petroleum Products
4. Summary of Test Method
D5967Test Method for Evaluation of Diesel Engine Oils in
4.1 The sample is placed in a controlled stress or controlled
T-8 Diesel Engine
shear rate rheometer/viscometer at 100°C. The sample is
D6299Practice for Applying Statistical Quality Assurance
-1
presheared at 10 s for 30 s followed by heating at 100°C for
and Control Charting Techniques to Evaluate Analytical
-1
10 min.An increasing shear rate (approximately 10 to 300 s )
Measurement System Performance
or shear stress (0.1 to 10 Pa) sweep is run followed by a
decreasing sweep. The rotational viscosity for each step
3. Terminology
-1
(increasing and decreasing) at 100 s shear rate is interpolated
3.1 Definitions of Terms Specific to This Standard:
from the viscosity versus shear rate data table. The rate index,
as a measure of shear thinning, is calculated from a plot of ln
(shear stress) versus ln (shear rate).
1
This test method is under the jurisdiction of ASTM Committee D02 on
5. Significance and Use
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
D02.07 on Flow Properties.
5.1 Rotationalviscositymeasurementsallowthedetermina-
Current edition approved Nov. 1, 2006. Published December 2006. Originally
´1 tionofthenon-Newtonian,shearthinningpropertyofdrainoil.
approved in 2003. Last previous edition approved in 2003 as D6895–03 . DOI:
10.1520/D6895-06. Rotational viscosity values can be compared at a shear rate of
2 -1 2,3
Selby, K., “Rheology of Soot–thickened Diesel Engine Oils,” SAE 981369,
100 s by this test method.
May 1998.
3
George, H. F., Bardasz, E.A., and Soukup, B., “Understanding SMOTthrough
6. Apparatus
Designed Experimentation Part 3: An Improved approach to Drain Oil Viscosity
Measurements—Rotational Rheology,” SAE 97692, May 1997.
6.1 This test method uses rheometers/viscometers of the
4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
controlled stress or controlled rate mode of operation.The test
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
method requires the use of concentric cylinder measuring
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. geometry or cone and plate measuring geometries, with a
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D6895 − 06
-1
minimumconediameterof50mm,capableofoperatinginthe between 0.98 to 1.02 and a viscosity value at 100 s , mPa·s,
range of approximately 0.1 to 10 Pa for shear stress and 10 to VIS100. Control chart the values of VIS100 and rate index.
-1
300 s for shear ra
...