ASTM D6138-03
(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)
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 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 6138 – 03
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 D 6138; 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* 3.1.1.1 Discussion—Thedispersionofthethickenerformsa
two-phase system and immobilizes the liquid lubricant by
1.1 This test method covers the determination of corrosion-
surface tension and other physical forces. Other ingredients are
preventive properties of greases using grease- lubricated ball
commonly included to impart special properties. D217
bearings under dynamic wet conditions.
3.1.2 thickener, n—in lubricating grease, a substance com-
1.2 The values stated in SI units are to be regarded as the
posed of finely-divided particles dispersed in a liquid lubricant
standard. The values given in parentheses are for information
to form the product’s structure.
only.
3.1.2.1 Discussion—The thickeners can be fibers (such as
1.3 This standard does not purport to address all of the
various metallic soaps) or plates or spheres (such as certain
safety concerns, if any, associated with its use. It is the
non-soap thickener), which are insoluble or, at most, only very
responsibility of the user of this standard to establish appro-
slightly soluble in the liquid lubricant. The general require-
priate safety and health practices and determine the applica-
ments are that the solid particles be extremely small, uniformly
bility of regulatory limitations prior to use.
dispersed, and capable of forming a relatively stable, gel-like
2. Referenced Documents structure with the liquid lubricant. D217
3.2 Definitions of Terms Specific to This Standard:
2.1 ASTM Standards:
3.2.1 corrosion, n—red rust or black spots on the race.
D 217 Test Method for Cone Penetration of Lubricating
2
3.2.1.1 Discussion—anystainthroughwhichtheunderlying
Grease
metal surface is still visible shall be ignored.
D 665 Test Method for Rust-Preventing Characteristics of
2
Inhibited Mineral Oil in the Presence of Water
4. Summary of Test Method
3
D 1193 Specification for Reagent Water
4
4.1 New, cleaned, and lubricated bearings are tested par-
2.2 ISO Standards:
tially immersed in water (distilled, synthetic sea water, or
ISO 15 Rolling bearings - Radial bearings - Boundary
sodium chloride solution) under no applied load at a speed of
dimensions - General plan
83 6 5 rpm in a predetermined sequence of running and
ISO 3696 Water for analytical laboratory use - Specifica-
stopping for a period of approximately one week. After
tions and test methods
cleaning,thebearingringsareexaminedandratedaccordingto
ISO 7120 Petroleum products and lubricants - Petroleum
the degree of corrosion.
oils and other fluids - Determination of rust-preventing
characteristics in the presence of water
5. Significance and Use
3. Terminology 5.1 This test method is used to assess the ability of grease to
prevent corrosion in rolling bearings operated in the presence
3.1 Definitions:
of distilled water, sodium chloride solution, or synthetic sea
3.1.1 lubricating grease, n—a semifluid to solid product of
water. It is used for development and specification purposes.
a thickener in a liquid lubricant.
6. Apparatus
1
6.1 Test Bearings—Use a double row self-aligning ball
This test method is under the jurisdiction of ASTM Committee D02 on
PetroleumProductsandLubricants andisthedirectresponsibilityofSubcommittee
bearing(30by72by19mm),conformingto1306KofISO15,
5
D02.G0 on Lubricating Grease.
with a steel cage. In cases of dispute, the SKF bearing
Current edition approved June 10, 2003. Published July 2003. Originally
specified in Footnote 5 shall be used as the referee bearing.
approved in 1997. Last previous edition approved in 1997 as D 6138 – 97.
2
Annual Book of ASTM Standards, Vol 05.01.
3
Annual Book of ASTM Standards, Vol 11.01.
4 5
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., 1306 K steel caged bearing manufactured by NTN and DKF may be used;
4th Floor, New York, NY 10036. however, precision had only been evaluated using SKF 1306 K/236 725 bearings.
*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 ----------------------
D6138–03
6.2 SKF TMG/Emcor Test Machine, see Annex A1 for with tongs or protective gloves. Do not touch the bearings with
description. bare fingers at any time
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.