ASTM D2711-01a
(Test Method)Standard Test Method for Demulsibility Characteristics of Lubricating Oils
Standard Test Method for Demulsibility Characteristics of Lubricating Oils
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.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation:D2711–01a
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 (e) 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
2.1 ASTM Standards: capable of maintaining a temperature of 82 6 1°C (180 6 2°F)
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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
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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
water are stirred together for 5 min at 82 °C (180 °F) in a irritant. High concentration can cause unconsciousness or
special graduated separatory funnel.After a 5-h settling period death.)
following the stirring, percentage of water in the oil and the
NOTE 1—In cases in which the use of 1,1,1 trichloroethane is unac-
volumes of water and emulsion separating from the oil are
ceptable, some laboratories are using heptane or mineral spirits as
measured and recorded.
alternative solvents. The effect on the precision of this test method when
using an alternate solvent has not been determined.
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This test method is under the jurisdiction of ASTM Committee D02 on 6.2 Water—Type II reagent grade water conforming to
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
Specification D 1193.
D02.L0 on Industrial Lubricants.
Current edition approved Nov. 10, 2001. Published November 2001. Originally
published as D 2711 – 68 T. Last previous edition D 2711 – 01.
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Annual Book of ASTM Standards, Vol 11.01. Available from Research Appliance Co., Moose Lodge Rd., Dept. T, Cam-
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Annual Book of ASTM Standards, Vol 05.01. bridge, MD 21613.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2711–01a
FIG. 1 Stirrer
7. Preparation of Apparatus total of 5 min, including the start-up time. Then withdraw the
stirrer from the oil-water mixture but not entirely out of the
7.1 Clean the graduated separatory funnel by removing any
separatory funnel. Allow the stirrer to drain for 5 min, then
film of oil with cleaning solvent followed by a wash first with
remove from the sepa
...
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