Standard Test Method for Corrosion-Preventive Properties of Lubricating Greases in Presence of Dilute Synthetic Sea Water Environments

SIGNIFICANCE AND USE
5.1 This test method differentiates the relative corrosion-preventive capabilities of lubricating greases under the test conditions.
SCOPE
1.1 This test method covers the determination of the corrosion-preventive properties of greases using grease-lubricated tapered roller bearings exposed to various concentrations of dilute synthetic sea water stored under wet conditions. It is based on Test Method D1743, which is practiced using a similar procedure and distilled water. The reported result is a pass or fail rating as determined by at least two of three bearings.  
1.2 Apparatus Dimensions—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 All Other Values—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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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Publication Date
30-Apr-2011
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ASTM D5969-11e1 - Standard Test Method for Corrosion-Preventive Properties of Lubricating Greases in Presence of Dilute Synthetic Sea Water Environments
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Designation: D5969 − 11
StandardTest Method for
Corrosion-Preventive Properties of Lubricating Greases in
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Presence of Dilute Synthetic Sea Water Environments
This standard is issued under the fixed designation D5969; 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.
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ε NOTE—Fig. 6 was editorially reinstated in January 2013.
1. Scope* 3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1.1 This test method covers the determination of the
corrosion-preventive properties of greases using grease-
3.1.1 corrosion—the chemical or electrochemical reaction
lubricated tapered roller bearings exposed to various concen-
between a material, usually a metal, and its environment that
trations of dilute synthetic sea water stored under wet condi-
produces a deterioration of the material and its properties.
tions. It is based on Test Method D1743, which is practiced
3.1.1.1 Discussion—In this test method, corrosion is mani-
using a similar procedure and distilled water. The reported
fested by red rust or black stains on the bearing race. Stains,
result is a pass or fail rating as determined by at least two of
through which the underlying metal surface is still visible, are
three bearings.
not considered corrosion in Test Method D5969 and shall be
1.2 Apparatus Dimensions—The values stated in inch- ignored. D1743
pound units are to be regarded as standard.The values given in
parentheses are mathematical conversions to SI units that are 4. Summary of Test Method
provided for information only and are not considered standard.
4.1 New, cleaned, and lubricated bearings are run under a
1.3 All Other Values—The values stated in SI units are to be
light thrust load for 60 6 3 s to distribute the lubricant in a
regarded as standard. No other units of measurement are
pattern that might be found in service. The bearings are
included in this standard.
exposedtoasolutionofsyntheticseawateratsomepercentage
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in distilled water, then stored for 24 6 ⁄2hat52 6 1°C and
1.4 This standard does not purport to address all of the
100 % relative humidity. After cleaning, the bearing cups are
safety concerns, if any, associated with its use. It is the
examined for evidence of corrosion.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use.
5.1 This test method differentiates the relative corrosion-
2. Referenced Documents
preventive capabilities of lubricating greases under the test
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2.1 ASTM Standards: conditions.
D665 Test Method for Rust-Preventing Characteristics of
Inhibited Mineral Oil in the Presence of Water 6. Apparatus
D1193 Specification for Reagent Water
6.1 Bearings, Timken bearing cone and roller assembly
D1743 Test Method for Determining Corrosion Preventive
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LM11949 and cup LM11910.
Properties of Lubricating Greases
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6.2 Motor, 1750-rpm (approximate) speed, ⁄15 hp (min).
6.3 Bearing Holder, (see Fig. 1) consists of a 1 6 0.01-kg
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This test method is under the jurisdiction of ASTM Committee D02 on
mass, upper and lower plastic collars for the bearing cone
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
(PartsAand B), a metal screw, and a plastic collar for the cup
D02.G0.06 on Functional Tests - Contamination.
(Part C).
Current edition approved May 1, 2011. Published May 2011. Originally
approved in 1996. Last previous edition approved in 2008 as D5969–08. DOI:
6.4 Plastic Test Jar, as shown in Fig. 2.
10.1520/D5969-11.
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
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the ASTM website. Manufactured by the Timken Co., Canton, OH 44706.
*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
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D5969 − 11
KEY DESCRIPTION QUANTITY
1 PISTON 1
2 O RING 1
3 WEIGHT 1
4 UPPER FLANGE 1
5 LOWER FLANGE 1
1 1
6 ⁄4−20×1- ⁄4 FILLISTER HD. MACH. SCREW S.S. 1
7 O RING 1
8 BEARING HOLDER 1
9 PLASTIC JAR 1
10 O RING 1
FIG. 1 Test Method D1743 Bearing Holder Assembly
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D5969 − 11
sufficiently high purity to permit its use without lessening the
accuracy of the determination.
7.2 Purity of Water—Unless otherwise indicated, referenc
...

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