ASTM D7038-17
(Test Method)Standard Test Method for Evaluation of Moisture Corrosion Resistance of Automotive Gear Lubricants
Standard Test Method for Evaluation of Moisture Corrosion Resistance of Automotive Gear Lubricants
SIGNIFICANCE AND USE
5.1 This test simulates a type of severe field service in which corrosion-promoting moisture in the form of condensed water vapor accumulates in the axle assembly. This may happen as a result of volume expansion and contraction of the axle lubricant and the accompanied breathing in of moisture-laden air through the axle vent. The test screens lubricants for their ability to prevent the expected corrosion.
5.2 The L-33-1 test procedure is used or referred to in the following documents: ASTM Publication STP-512A,6 SAE J308, SAE J2360, and U.S. Military Specification MIL-PRF-2105E.
SCOPE
1.1 This test method covers a test procedure for evaluating the rust and corrosion inhibiting properties of a gear lubricant while subjected to water contamination and elevated temperature in a bench-mounted hypoid differential housing assembly.2 This test method is commonly referred to as the L-33-1 test.
1.2 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.
1.2.1 Exceptions—(1) where there is no direct SI equivalent such as screw threads and national pipe threads/diameters, and (2) the values stated in SI units are to be regarded as standard for the definitions in 12.2, and for SI units where there are no direct inch-pounds equivalent units.
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.
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.
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Designation: D7038 − 17
Standard Test Method for
Evaluation of Moisture Corrosion Resistance of Automotive
1
Gear Lubricants
This standard is issued under the fixed designation D7038; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Portions of this test method are written for use by laboratories that make use of ASTM Test
Monitoring Center (TMC) services (see Annex A1 – Annex A4).
TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesire
to produce test results that are statistically similar to those produced by laboratories previously
calibrated by the TMC.
In general, the Test Purchaser decides if a calibrated test stand is to be used. Organizations such as
the American Chemistry Council require that a laboratory use the TMC services as part of their test
registration process. In addition, the American Petroleum Institute and the Gear Lubricant Review
Committee of the Lubricant Review Institute (SAE International) require that a laboratory use the
TMC services in seeking qualification of oils against their specifications.
The advantage of using the TMC services to calibrate test stands is that the test laboratory (and
hence theTest Purchaser) has an assurance that the test stand was operating at the proper level of test
severity. It should also be borne in mind that results obtained in a non calibrated test stand may not
be the same as those obtained in a test stand participating in the ASTM TMC services process.
Laboratories that choose not to use the TMC services may simply disregard these portions.
1. Scope* for the definitions in 12.2, and for SI units where there are no
direct inch-pounds equivalent units.
1.1 This test method covers a test procedure for evaluating
1.3 This standard does not purport to address all of the
the rust and corrosion inhibiting properties of a gear lubricant
safety concerns, if any, associated with its use. It is the
while subjected to water contamination and elevated tempera-
2
responsibility of the user of this standard to establish appro-
tureinabench-mountedhypoiddifferentialhousingassembly.
priate safety and health practices and determine the applica-
This test method is commonly referred to as the L-33-1 test.
bility of regulatory limitations prior to use.
1.2 The values stated in inch-pound units are to be regarded
1.4 This international standard was developed in accor-
as standard. The values given in parentheses are mathematical
dance with internationally recognized principles on standard-
conversions to SI units that are provided for information only
ization established in the Decision on Principles for the
and are not considered standard.
Development of International Standards, Guides and Recom-
1.2.1 Exceptions—(1) where there is no direct SI equivalent
mendations issued by the World Trade Organization Technical
such as screw threads and national pipe threads/diameters, and
Barriers to Trade (TBT) Committee.
(2) the values stated in SI units are to be regarded as standard
2. Referenced Documents
3
2.1 ASTM Standards:
1
This test method is under the jurisdiction of ASTM Committee D02 on
D235Specification for Mineral Spirits (Petroleum Spirits)
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
(Hydrocarbon Dry Cleaning Solvent)
Subcommittee D02.B0 on Automotive Lubricants.
E29Practice for Using Significant Digits in Test Data to
Current edition approved May 1, 2017. Published May 2017. Originally
approved in 2004. Last previous edition approved in 2015 as D7038–15. DOI: Determine Conformance with Specifications
10.1520/D7038-17.
2
Until the next revision of this test method, the ASTM Test Monitoring Center
3
(TMC) will update changes in this test method by means of Information Letters. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
This edition includes all Information Letters through 16-2. Information Letters may contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
be obtained from the ASTM TMC, 6555 Penn Ave., Pittsburgh, PA 15206-4489, Standards volume information, refer to the standard’s Document Summary page on
Attention: Administrator. The TMC is also the source of reference oils. the ASTM website.
*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
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D7038 − 17
2.2 ASTM Standard: 5.2 The L-33-1 test procedure is used or referred to in the
6
4 follow
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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: D7038 − 15 D7038 − 17
Standard Test Method for
Evaluation of Moisture Corrosion Resistance of Automotive
1
Gear Lubricants
This standard is issued under the fixed designation D7038; 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.
INTRODUCTION
This Portions of this test method isare written for use by laboratories that make use the portions of
the test method that refer to of ASTM Test Monitoring Center (TMC) services (see Annex A1Annex
A1 – Annex A4). Laboratories that choose not to use the TMC services may simply disregard these
portions.
The TMC provides reference oils, and engineering and statistical services to laboratories that desire
to produce test results that are statistically similar to those produced by laboratories previously
calibrated by the TMC.
In general, the Test Purchaser decides if a calibrated test stand is to be used. Organizations such as
the American Chemistry Council require that a laboratory use the TMC services as part of their test
registration process. In addition, the American Petroleum Institute and the Gear Lubricant Review
Committee of the Lubricant Review Institute (SAE International) require that a laboratory use the
TMC services in seeking qualification of oils against their specifications.
NOTE 1—The advantage of using the TMC services to calibrate test stands is that the test laboratory (and hence the
Test Purchaser) has an assurance that the test stand was operating at the proper level of test severity. It should also be
borne in mind that results obtained in a non calibrated test stand may not be the same as those obtained in a test stand
participating in the ASTM TMC services process.
The advantage of using the TMC services to calibrate test stands is that the test laboratory (and
hence the Test Purchaser) has an assurance that the test stand was operating at the proper level of test
severity. It should also be borne in mind that results obtained in a non calibrated test stand may not
be the same as those obtained in a test stand participating in the ASTM TMC services process.
Laboratories that choose not to use the TMC services may simply disregard these portions.
1. Scope*
1.1 This test method covers a test procedure for evaluating the rust and corrosion inhibiting properties of a gear lubricant while
2
subjected to water contamination and elevated temperature in a bench-mounted hypoid differential housing assembly. This test
method is commonly referred to as the L-33-1 test.
1.2 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.
1.2.1 Exceptions—(1) where there is no direct SI equivalent such as screw threads and national pipe threads/diameters, and (2)
the values stated in SI units are to be regarded as standard for the definitions in 12.2, and for SI units where there are no direct
inch-pounds equivalent units.
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.
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.B0 on Automotive Lubricants.
Current edition approved April 1, 2015May 1, 2017. Published May 2015May 2017. Originally approved in 2004. Last previous edition approved in 20142015 as
D7038 – 14.D7038 – 15. DOI: 10.1520/D7038-15.10.1520/D7038-17.
2
Until the next revision of this test method, the ASTM Test Monitoring Center (TMC) will update changes in this test method by means of Information Letters. This edition
includes all Information Letters through 14–2.16-2. Information Letters may be obtained from the ASTM TMC, 6555 Penn Ave., Pittsburgh, PA 15206-4489, Attention:
Administrator. The TMC is also the source of reference oils.
*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 --------
...
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