ASTM D6138-13
(Test Method)Standard Test Method for Determination of Corrosion-Preventive Properties of Lubricating Greases Under Dynamic Wet Conditions (Emcor Test)
Standard Test Method for Determination of Corrosion-Preventive Properties of Lubricating Greases Under Dynamic Wet Conditions (Emcor Test)
SIGNIFICANCE AND USE
5.1 This test method is used to assess the ability of grease to prevent corrosion in rolling bearings operated in the presence of distilled water, sodium chloride solution, or synthetic sea water. It is used for development and specification purposes.
SCOPE
1.1 This test method covers the determination of corrosion- preventive properties of greases using grease- lubricated ball bearings under dynamic wet conditions.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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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Designation: D6138 − 13
StandardTest Method for
Determination of Corrosion-Preventive Properties of
Lubricating Greases Under Dynamic Wet Conditions (Emcor
1
Test)
This standard is issued under the fixed designation D6138; 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* 3. Terminology
1.1 This test method covers the determination of corrosion- 3.1 Definitions:
preventive properties of greases using grease- lubricated ball 3.1.1 lubricating grease, n—a semifluid to solid product of
bearings under dynamic wet conditions. a thickener in a liquid lubricant.
3.1.1.1 Discussion—The dispersion of the thickener forms a
1.2 The values stated in SI units are to be regarded as
two-phase system and immobilizes the liquid lubricant by
standard. No other units of measurement are included in this
surface tension and other physical forces. Other ingredients are
standard.
commonly included to impart special properties. D217
1.3 This standard does not purport to address all of the
3.1.2 thickener, n—in lubricating grease, a substance com-
safety concerns, if any, associated with its use. It is the
posed of finely-divided particles dispersed in a liquid lubricant
responsibility of the user of this standard to establish appro-
to form the product’s structure.
priate safety and health practices and determine the applica-
3.1.2.1 Discussion—The thickeners can be fibers (such as
bility of regulatory limitations prior to use.
various metallic soaps) or plates or spheres (such as certain
non-soap thickener), which are insoluble or, at most, only very
2. Referenced Documents
slightly soluble in the liquid lubricant. The general require-
2
2.1 ASTM Standards:
ments are that the solid particles be extremely small, uniformly
D217 Test Methods for Cone Penetration of Lubricating
dispersed, and capable of forming a relatively stable, gel-like
Grease
structure with the liquid lubricant. D217
D665 Test Method for Rust-Preventing Characteristics of
3.2 Definitions of Terms Specific to This Standard:
Inhibited Mineral Oil in the Presence of Water
3.2.1 corrosion, n—reddish rust or black spots on the race.
D1193 Specification for Reagent Water
3.2.1.1 Discussion—any stain through which the underlying
3
2.2 ISO Standards:
metal surface is still visible shall be ignored.
ISO 15 Rolling bearings - Radial bearings - Boundary di-
4. Summary of Test Method
mensions - General plan
ISO 3696 Waterforanalyticallaboratoryuse-Specifications
4.1 New, cleaned, and lubricated bearings are tested par-
and test methods
tially immersed in water (distilled, synthetic sea water, or
ISO 7120 Petroleum products and lubricants - Petroleum
sodium chloride solution) under no applied load at a speed of
oils and other fluids - Determination of rust-preventing
83 6 5 rpm in a predetermined sequence of running and
characteristics in the presence of water
stopping for a period of approximately one week. After
cleaning,thebearingringsareexaminedandratedaccordingto
the degree of corrosion.
1
This test method is under the jurisdiction of ASTM Committee D02 on
5. Significance and Use
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.G0.06 on Functional Tests - Contamination.
5.1 This test method is used to assess the ability of grease to
Current edition approved May 1, 2013. Published May 2013. Originally
prevent corrosion in rolling bearings operated in the presence
approved in 1997. Last previous edition approved in 2011 as D6138 – 11. DOI:
of distilled water, sodium chloride solution, or synthetic sea
10.1520/D6138-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
water. It is used for development and specification purposes.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 6. Apparatus
the ASTM website.
3
6.1 Test Bearings—Use a double row self-aligning ball
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. bearing (30 by 72 by 19 mm), conforming to 1306 K of
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6138 − 13
4
ISO 15,withasteelcage. Incasesofdispute,theSKFbearing
specified in Footnote 5 shall be used as the referee bearing.
6.2 SKF TMG/Emcor Test Machine, see Annex A1 for
description.
6.3 Dentist’s Mirror, non-magnifying.
6
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6138 − 11 D6138 − 13
Standard Test Method for
Determination of Corrosion-Preventive Properties of
Lubricating Greases Under Dynamic Wet Conditions (Emcor
1
Test)
This standard is issued under the fixed designation D6138; 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*
1.1 This test method covers the determination of corrosion- preventive properties of greases using grease- lubricated ball
bearings under dynamic wet conditions.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D217 Test Methods for Cone Penetration of Lubricating Grease
D665 Test Method for Rust-Preventing Characteristics of Inhibited Mineral Oil in the Presence of Water
D1193 Specification for Reagent Water
3
2.2 ISO Standards:
ISO 15 Rolling bearings - Radial bearings - Boundary dimensions - General plan
ISO 3696 Water for analytical laboratory use - Specifications and test methods
ISO 7120 Petroleum products and lubricants - Petroleum oils and other fluids - Determination of rust-preventing characteristics
in the presence of water
3. Terminology
3.1 Definitions:
3.1.1 lubricating grease, n—a semifluid to solid product of a thickener in a liquid lubricant.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.G0.06
on Functional Tests - Contamination.
Current edition approved May 1, 2011May 1, 2013. Published May 2011 May 2013. Originally approved in 1997. Last previous edition approved in 20072011 as
D6138D6138 – 11.–07. DOI: 10.1520/D6138-11.10.1520/D6138-13.
2
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
3.1.1.1 Discussion—
The dispersion of the thickener forms a two-phase system and immobilizes the liquid lubricant by surface tension and other
physical forces. Other ingredients are commonly included to impart special properties. D217
3.1.2 thickener, n—in lubricating grease, a substance composed of finely-divided particles dispersed in a liquid lubricant to form
the product’s structure.
3.1.2.1 Discussion—
The thickeners can be fibers (such as various metallic soaps) or plates or spheres (such as certain non-soap thickener), which are
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6138 − 13
insoluble or, at most, only very slightly soluble in the liquid lubricant. The general requirements are that the solid particles be
extremely small, uniformly dispersed, and capable of forming a relatively stable, gel-like structure with the liquid lubricant. D217
3.2 Definitions of Terms Specific to This Standard:
3.2.1 corrosion, n—reddish rust or black spots on the race.
3.2.1.1 Discussion—
any stain through which the underlying metal surface is still visible shall be ignored.
4. Summary of Test Method
4.1 New, cleaned, and lubricated bearings are tested partially immersed in water (distilled, synthetic sea water, or sodium
chloride solution) under no applied load at a speed of 83 6 5 rpm in a predetermined sequence of running and stopping for a period
of approximately one week. After cleaning, the bearing rings are examined and rated according to the degree of corrosion.
5. Significance and Use
5.1 This test method is used to assess the ability of grease to prevent corrosion in rolling bearings operated in the presence of
distilled water, sodium chloride solution, or synthetic sea water. It is used for development and specification
...
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