ASTM D6138-19
(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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Designation: D6138 − 19
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* ISO 3696 Water for analytical laboratory use—
Specifications and test methods
1.1 This test method covers the determination of corrosion-
ISO 7120 Petroleum products and lubricants—Petroleum
preventive properties of greases using grease-lubricated ball
oils and other fluids—Determination of rust-preventing
bearings under dynamic wet conditions.
characteristics in the presence of water
1.2 The values stated in SI units are to be regarded as
4
2.3 EI Standards:
standard. No other units of measurement are included in this
IP 530 Determination of the density of grease—Density cup
standard.
method
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions:
priate safety, health, and environmental practices and deter-
3.1.1 lubricating grease, n—a semifluid to solid product of
mine the applicability of regulatory limitations prior to use.
a thickener in a liquid lubricant.
1.4 This international standard was developed in accor-
3.1.1.1 Discussion—The dispersion of the thickener forms a
dance with internationally recognized principles on standard-
two-phase system and immobilizes the liquid lubricant by
ization established in the Decision on Principles for the
surface tension and other physical forces. Other ingredients are
Development of International Standards, Guides and Recom-
commonly included to impart special properties. D217
mendations issued by the World Trade Organization Technical
3.1.2 thickener, n—in lubricating grease, a substance com-
Barriers to Trade (TBT) Committee.
posed of finely-divided particles dispersed in a liquid lubricant
to form the product’s structure.
2. Referenced Documents
3.1.2.1 Discussion—The thickeners can be fibers (such as
2
2.1 ASTM Standards:
various metallic soaps) or plates or spheres (such as certain
D217 Test Methods for Cone Penetration of Lubricating
non-soap thickener), which are insoluble or, at most, only very
Grease
slightly soluble in the liquid lubricant. The general require-
D665 Test Method for Rust-Preventing Characteristics of
ments are that the solid particles be extremely small, uniformly
Inhibited Mineral Oil in the Presence of Water
dispersed, and capable of forming a relatively stable, gel-like
D1193 Specification for Reagent Water
structure with the liquid lubricant. D217
3
2.2 ISO Standards:
3.2 Definitions of Terms Specific to This Standard:
ISO 15 Rolling bearings—Radial bearings—Boundary
3.2.1 corrosion, n—reddish rust or black spots on the race.
dimensions—General plan
3.2.1.1 Discussion—Any stain through which the underly-
ing metal surface is still visible shall be ignored.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of 4. Summary of Test Method
Subcommittee D02.G0.06 on Functional Tests - Contamination.
4.1 New, cleaned, and lubricated bearings are tested par-
Current edition approved Dec. 1, 2019. Published December 2019. Originally
approved in 1997. Last previous edition approved in 2018 as D6138 – 18. DOI: tially immersed in water (distilled, synthetic sea water, or
10.1520/D6138-19.
sodium chloride solution) under no applied load at a speed of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
83 r ⁄min 6 5 r ⁄min in a predetermined sequence of running
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 4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., Available from Energy Institute, 61 New Cavendish St., London, W1G 7AR,
4th Floor, New York, NY 10036, http://www.ansi.org. U.K., http://www.energyinst.org.
*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 − 19
and stopping for a period of approximately one week. After 7.5 Isopropyl Alcohol—(Warning—Flammable. Poison.
cleaning, the bearing rings are examined and rated according to Caus
...
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 − 18 D6138 − 19
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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
4
2.3 EI Standards:
IP 530 Determination of the density of grease—Density cup method
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, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.G0.06 on Functional Tests - Contamination.
Current edition approved April 1, 2018Dec. 1, 2019. Published April 2018December 2019. Originally approved in 1997. Last previous edition approved in 20162018 as
D6138 – 16.D6138 – 18. DOI: 10.1520/D6138-18. 10.1520/D6138-19.
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.
4
Available from Energy Institute, 61 New Cavendish St., London, W1G 7AR, U.K., http://www.energyinst.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
*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 − 19
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
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, synt
...
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