ASTM D6185-97
(Practice)Standard Practice for Evaluating Compatibility of Binary Mixtures of Lubricating Greases
Standard Practice for Evaluating Compatibility of Binary Mixtures of Lubricating Greases
SCOPE
1.1 This practice covers a protocol for evaluating the compatibility of one or three binary mixtures of lubricating greases by comparing their properties or performance relative to those of the neat greases comprising the mixture.
1.2 Three properties are evaluated in a primary testing protocol using standard test methods: (1) dropping point by Test Method D 566 (or Test Method D 2265); (2) shear stability by Test Methods D 217, 100 000-stroke worked penetration; and (3) storage stability at elevated-temperature by change in 60-stroke penetration (Test Method D 217). For compatible mixtures (those passing all primary testing), a secondary (nonmandatory) testing scheme is suggested when circumstances indicate the need for additional testing.
1.3 Sequential or concurrent testing is continued until the first failure. If any mixture fails any of the primary tests, the greases are incompatible. If all mixtures pass the three primary tests, the greases are considered compatible.
1.4 This practice applies only to lubricating greases having characteristics suitable for evaluation by the suggested test methods. If the scope of a specific test method limits testing to those greases within a specified range of properties, greases outside that range cannot be tested for compatibility by that test method. An exception to this would be when the tested property of the neat, constituent greases is within the specified range, but the tested property of a mixture is outside the range because of incompatibility.
1.5 This practice does not purport to cover all test methods that could be employed.
1.6 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and practices and determine the applicability of regulatory limitations prior to use. For specific safety information, see 7.2.3.
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Designation: D 6185 – 97
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Evaluating Compatibility of Binary Mixtures of Lubricating
1
Greases
This standard is issued under the fixed designation D 6185; 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 D 217 Test Methods for Cone Penetration of Lubricating
2
Grease
1.1 This practice covers a protocol for evaluating the
D 566 Test Method for Dropping Point of Lubricating
compatibility of one or three binary mixtures of lubricating
2
Grease
greases by comparing their properties or performance relative
D 972 Test Method for Evaporation Loss of Lubricating
to those of the neat greases comprising the mixture.
2
Greases and Oils
1.2 Three properties are evaluated in a primary testing
D 1092 Test Method for Measuring Apparent Viscosity of
protocol using standard test methods: (1) dropping point by
2
Lubricating Greases
Test Method D 566 (or Test Method D 2265); (2) shear
D 1263 Test Method for Leakage Tendencies of Automotive
stability by Test Methods D 217, 100 000–stroke worked
2
Wheel Bearing Greases
penetration; and (3) storage stability at elevated-temperature by
D 1264 Test Method for Determining Water Washout Char-
change in 60-stroke penetration (Test Method D 217). For
2
acteristics of Lubricating Greases
compatible mixtures (those passing all primary testing), a
D 1403 Test Method for Cone Penetration of Lubricating
secondary (nonmandatory) testing scheme is suggested when
Grease Using One-Quarter and One-Half Scale Cone
circumstances indicate the need for additional testing.
2
Equipment
1.3 Sequential or concurrent testing is continued until the
D 1478 Test Method for Low-Temperature Torque of Ball
first failure. If any mixture fails any of the primary tests, the 2
Bearing Greases
greases are incompatible. If all mixtures pass the three primary
D 1742 Test Method for Oil Separation from Lubricating
tests, the greases are considered compatible. 2
Grease During Storage
1.4 This practice applies only to lubricating greases having
D 1743 Test Method for Determining Corrosion Preventive
2
characteristics suitable for evaluation by the suggested test
Properties of Lubricating Greases
methods. If the scope of a specific test method limits testing to
D 1831 Test Method for Roll Stability of Lubricating
2
those greases within a specified range of properties, greases
Grease
outside that range cannot be tested for compatibility by that test
D 2265 Test Method for Dropping Point of Lubricating
2
method. An exception to this would be when the tested
Grease Over Wide Temperature Range
property of the neat, constituent greases is within the specified
D 2266 Test Method for Wear Preventive Characteristics of
2
range, but the tested property of a mixture is outside the range
Lubricating Grease (Four-Ball Method)
because of incompatibility.
D 2509 Test Method for Measurement of Load-Carrying
2
1.5 This practice does not purport to cover all test methods Capacity of Lubricating Greases (Timken Method)
that could be employed.
D 2595 Test Method for Evaporation Loss of Lubricating
2
Greases over WideTemperature Range
1.6 This standard does not purport to address all the safety
D 2596 Test Method for Measurement of Extreme-Pressure
concerns, if any, associated with its use. It is the responsibility
2
Properties of Lubricating Grease (Four-Ball Method)
of the user of this standard to establish appropriate safety and
D 3336 Test Method for Life of Lubricating Greases in Ball
practices and determine the applicability of regulatory limita-
3
Bearings at Elevated Temperatures
tions prior to use.
D 3337 Test Method for Determining Life and Torque of
3
Lubricating Greases in Small Ball Bearings
2. Referenced Documents
D 3527 Test Method for Life Performance of Automotive
2.1 ASTM Standards:
3
Wheel Bearing Grease
D 4049 Test Method for Determining the Resistance of
3
Lubricating Grease to Water Spray
1
This practice is under the jurisdiction of ASTM Committee D-2 on Petroleum
Products and Lubricants and is the direct responsibility of Subcommittee D02.G on
2
Lubricating Grease. Annual Book of ASTM Standards, Vol 05.01.
3
Current edition approved Nov. 10, 1997. Published January 1998. Annual Book of ASTM Standards, Vol 05.02.
1
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D 6185
D 4170 Test Method for Fretting Wear Protection by Lubri- ments are that the solid particles be extremely small, uniformly
3
cating Grease dispersed, an
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