Standard Test Method for Demulsibility Characteristics of Lubricating Oils

SIGNIFICANCE AND USE
This test provides a guide for determining the demulsibility characteristic of lubricating oils that are prone to water contamination and may encounter the turbulence of pumping and circulation capable of producing water-in-oil emulsions.
SCOPE
1.1 This test method covers the measurement of the ability of oil and water to separate from each other. It is intended for use in testing medium and high-viscosity lubricating oils.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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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Historical
Publication Date
14-Jul-2007
Current Stage
Ref Project

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ASTM D2711-01a(2007) - Standard Test Method for Demulsibility Characteristics of Lubricating Oils
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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An American National Standard
Designation:D2711–01a (Reapproved 2007)
Standard Test Method for
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Demulsibility Characteristics of Lubricating Oils
This standard is issued under the fixed designation D 2711; 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 4. Significance and Use
1.1 This test method covers the measurement of the ability 4.1 This test provides a guide for determining the demulsi-
of oil and water to separate from each other. It is intended for bility characteristic of lubricating oils that are prone to water
use in testing medium and high-viscosity lubricating oils. contamination and may encounter the turbulence of pumping
1.2 The values stated in SI units are to be regarded as the and circulation capable of producing water-in-oil emulsions.
standard. The values given in parentheses are for information
5. Apparatus
only.
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1.3 This standard does not purport to address all of the 5.1 Stirrer, constructedfrompartsshowninFig.1andFig.
2.
safety concerns, if any, associated with its use. It is the
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responsibility of the user of this standard to establish appro- 5.2 Special Graduated Separatory Funnel, as shown in
Fig. 3.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 5.3 Heating Bath, sufficiently large and deep to permit the
immersion of at least two test separatory funnels in the bath
2. Referenced Documents
liquid up to their 500-mL graduation mark. The bath shall be
2
2.1 ASTM Standards: capable of maintaining a temperature of 82 6 1°C (180 6 2°F)
D 1193 Specification for Reagent Water and shall be so equipped to hold the separatory funnels
D 1796 TestMethodforWaterandSedimentinFuelOilsby securely in a position so that the vertical axis of the stirrer
the Centrifuge Method (Laboratory Procedure) corresponds to the center line of the separatory funnel during
the mixing of the oil and water.
3. Summary of Test Method
5.4 Centrifuge, as described in Test Method D 1796.
3.1 For Oils That Do Not Contain Extreme Pressure (EP) 5.5 Centrifuge Tubes, long-form, 195 to 203 mm (8 in.) as
Additives—A405-mL sample of the oil and 45 mL of distilled described in Fig. 1 of Test Method D 1796.
waterarestirredtogetherfor5minat82°C(180°F)inaspecial
6. Materials
graduated separatory funnel.After a 5-h settling period follow-
ing the stirring, a percentage of the water in the oil and the 6.1 Cleaning Solvent—Any suitable solvent capable of
volumes of water and emulsion separating from the oil are cleaning and effectively removing any oil or fluid from the
measured and recorded. stirrer and graduated cylinder. 1,1,1-Trichloroethane has been
3.2 For Oils That Contain Extreme Pressure (EP) found suitable for use in this test method. (Warning—
Additives—A360-mL sample of the oil and 90 mL of distilled 1,1,1–Trichloroethane, Harmful if inhaled or swallowed. Eye
waterarestirredtogetherfor5minat82°C(180°F)inaspecial irritant. High concentration can cause unconsciousness or
graduated separatory funnel.After a 5-h settling period follow- death.)
ing the stirring, percentage of water in the oil and the volumes
NOTE 1—In cases in which the use of 1,1,1 trichloroethane is unac-
ofwaterandemulsionseparatingfromtheoilaremeasuredand
ceptable, some laboratories are using heptane or mineral spirits as
recorded.
alternative solvents. The effect on the precision of this test method when
using an alternate solvent has not been determined.
1 6.2 Water—Type II reagent grade water conforming to
This test method is under the jurisdiction of ASTM Committee D02 on
Specification D 1193.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.L0.01 on Metal Removal Fluids and Lubricants.
Current edition approved July 15, 2007. Published September 2007. Originally
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approved in 1968. Last previous edition approved in 2001 as D 2711–01a. The sole source of supply of the apparatus known to the committee at this time
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