Standard Test Method for Coolant Compatibility of Way Lubricants

SIGNIFICANCE AND USE
In the normal use of a way lubricant in a machine tool, the way lubricant eventually becomes a contaminant that may emulsify into the coolant. It is generally desirable to remove this contaminant by skimming; otherwise, the coolant lifetime may be significantly shortened. This test method provides a guide for determining the separability characteristics of way lubricants that are expected to get into aqueous alkaline metalworking coolants. It is used for specification of new oils and might be useful in monitoring of in-service oils.
SCOPE
1.1 This test method measures the ability of single-use way lubricants to separate from metalworking coolants (synthetic coolants, semisynthetic coolants, and soluble oils) or other alkaline aqueous fluids.
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. For specific precautionary statements, see Section 7 .

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Publication Date
31-May-2005
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ASTM D6553-00(2005) - Standard Test Method for Coolant Compatibility of Way Lubricants
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:D6553–00 (Reapproved 2005)
Standard Test Method for
Coolant Compatibility of Way Lubricants
This standard is issued under the fixed designation D6553; 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 sample and 40 mL of either actual coolant or a pH 9.0 buffer
solution (see Note 1) are stirred for 5 min at 54°C (see Note 2)
1.1 This test method measures the ability of single-use way
in a graduated cylinder. The time required for the separation of
lubricants to separate from metalworking coolants (synthetic
theemulsionthusformedisrecorded.Ifcompleteseparationor
coolants, semisynthetic coolants, and soluble oils) or other
emulsion reduction to 3 mL or less does not occur after
alkaline aqueous fluids.
standing for 30 min, the volumes of oil (or fluid), water, and
1.2 The values stated in SI units are to be regarded as the
emulsion remaining at the time are reported.
standard. The values given in parentheses are for information
only.
NOTE 1—Distilled water is not a satisfactory aqueous phase for testing
1.3 This standard does not purport to address all of the the ability of way lubricants to separate from coolants because distilled
watergivesdifferentresultsfromcoolants.Thebestprocedureistousethe
safety concerns, if any, associated with its use. It is the
actual coolant that the way lubricant will contaminate.Abuffer solution of
responsibility of the user of this standard to establish appro-
pH 9.0 may be used in place of a specific coolant to predict the
priate safety and health practices and determine the applica-
separability from alkaline coolants in general.
bility of regulatory limitations prior to use. For specific
NOTE 2—It is recommended, however, that the test temperature be
warning statements, see Section 7.
raised to 82 6 1°C when testing way lubricants more viscous than 90 cSt
(mm 2/s) at 40°C.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
D1193 Specification for Reagent Water
In the normal use of a way lubricant in a machine tool, the
D1401 Test Method for Water Separability of Petroleum
way lubricant eventually becomes a contaminant that may
Oils and Synthetic Fluids
emulsify into the coolant. It is generally desirable to remove
D4057 Practice for Manual Sampling of Petroleum and
this contaminant by skimming; otherwise, the coolant lifetime
Petroleum Products
may be significantly shortened. This test method provides a
guide for determining the separability characteristics of way
3. Terminology
lubricants that are expected to get into aqueous alkaline
3.1 Definitions:
metalworking coolants. It is used for specification of new oils
3.1.1 cuff—alayerbetweenthewayoillayerandthecoolant
and might be useful in monitoring of in-service oils.
or buffer layer that contains significant amounts of both. In
6. Apparatus
describing this intermediate layer, cuff is preferred to emulsion
since many of the coolants are themselves emulsions.
6.1 Cylinder, 100 mL, graduated from 5 to 100 mL in
1.0-mL divisions, made of glass, heat-resistant glass, or a
4. Summary of Test Method
chemical equivalent. The inside diameter shall be no less than
4.1 This test procedure is essentially identical to Test
27 mm and no more than 30 mm throughout its length,
Method D1401, with the actual coolant or an alkaline buffer
measured from the top to a point 6 mm from the bottom of the
replacing the distilled water of that test method. A 40-mL
cylinder. The overall length of the cylinder shall be 225 to 260
mm. The graduation shall not be in error by more than 1 mLat
any point on the scale.
This test method is under the jurisdiction of ASTM Committee D02 on
6.2 Heating Bath, sufficiently large and deep enough to
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.L0.02 on Machinery Lubricants.
permit the immersion of at least two test cylinders in the bath
Current edition approved June 1, 2005. Published August 2005. Originally
liquid up to their 85-mLgraduations.The bath shall be capable
approved in 2000. Last previous edition approved in 2000 as D6553–00. DOI:
of being maintained at a temperature of 54 6 1°C (see Note 2),
10.1520/D6553-00R05.
and shall be fitted with clamps, which hold the cylinder in a
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
position so that the longitudinal axis of the paddle corresponds
Standards volume information, refer to the standard’s Document Summary page on
to the vertical center line of the cylinder during the stirring
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6553–00 (2005)
operation.The clamps shall hold the cylinder securely while its oughly with tap water and then with reagent water. Inspect the
contents are being stirred. cylinders for any residue or water droplets adhering to the
6.3 Stirring Paddle, made of chromium-plated or stainless inside walls. Both conditions indicate a need for additional
steel and conforming to the following dimensions: length, 120 cleaning.
3 1 3 1
6 1.5 mm (4 ⁄4 6 ⁄16 in.); width, 19 6 0.5 mm ( ⁄4 6 ⁄64 in.); 9.2 Cleanthestirringpaddleandshaftwithabsorbentcotton
thickness, 1.5 mm ( ⁄16 in.). It is mounted on a vertical shaft of or tissue wet with cleaning solvent and air dry. Care must be
similar metal, approximately 6 mm ( ⁄4 in.) in diameter, taken not to bend or misalign the paddle assembly during the
connected to a drive mechanism that rotates the paddle on its cleaning operation.
longitudinal axis at 1500 6 15 rpm. The apparatus is of such
design that, when the cylinder is clamped in position and the 10. Procedure
paddle assembly is lowered into the cylinder, a positive stop
10.1 Heat the bath liquid to 54 6 1°C (see Note 2) and
engages and holds the assembly when the lower edge of the
maintain it at that temperature throughout the test.Add coolant
paddle is 6 mm from the bottom of the cylinder. During the
orbuffer(seeNote3)tothegraduatedcylinderuptothe40-mL
operation of the stirrer, the center of the bottom edge of the
mark, and then add to the same cylinder a representative
paddle shall not deviate more than 1 mm from the axis of
sample of the oil (or fluid) under test until the top level of the
rotation. When not in operation, the paddle assembly can be
oil reaches the 80-mL mark on the cylinder. Place the cylinder
lifted vertically to clear the top of the graduated cylinder.
in the bath, and allow the contents to reach bath temperature.
Normally this will require about 10 min.
7. Reagents and Materials
NOTE 3—Ifinitialvolumetricmeasurementsaremadeatroomtempera-
7.1 Purity of Reagents—Reagent grade chemicals shall be
ture, expansion occurring at the elevated test temperature will have to be
used in all tests. Unless otherwise indicated, it is intended that
considered. For example, there will be a total volumetric expansion of
all reagents shall conform to the specifications of the Commit-
about 2 to 3 mL at 82°C. Corre
...

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