ASTM D7038-15
(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,8 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.
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Designation: D7038 − 15
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
This test method is written for use by laboratories that use the portions of the test method that refer
toASTMTestMonitoringCenter(TMC)services(seeAnnexA1).Laboratoriesthatchoosenottouse
the TMC services may simply disregard these portions.
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.
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.
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
as standard. The values given in parentheses are mathematical
2. Referenced Documents
conversions to SI units that are provided for information only
3
2.1 ASTM Standards:
and are not considered standard.
D235Specification for Mineral Spirits (Petroleum Spirits)
1.2.1 Exceptions—(1) where there is no direct SI equivalent
(Hydrocarbon Dry Cleaning Solvent)
such as screw threads and national pipe threads/diameters, and
E29Practice for Using Significant Digits in Test Data to
(2) the values stated in SI units are to be regarded as standard
Determine Conformance with Specifications
2.2 ASTM Standard:
4
2.3 Society of Automotive Engineers Standards:
1
This test method is under the jurisdiction of ASTM Committee D02 on
J308Information Report on Axle and Manual Transmission
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Lubricants
Subcommittee D02.B0 on Automotive Lubricants.
Current edition approved April 1, 2015. Published May 2015. Originally
approved in 2004. Last previous edition approved in 2014 as D7038–14. DOI:
3
10.1520/D7038-15. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
2
Until the next revision of this test method, the ASTM Test Monitoring Center contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
(TMC) will update changes in this test method by means of Information Letters. Standards volume information, refer to the standard’s Document Summary page on
ThiseditionincludesallInformationLettersthrough14–2.InformationLettersmay the ASTM website.
4
be obtained from the ASTM TMC, 6555 Penn Ave., Pittsburgh, PA 15206-4489, Available from Society of Automotive Engineers (SAE), 400 Commonwealth
Attention: Administrator. The TMC is also the source of reference oils. Dr., Warrendale, PA 15096-0001.
*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 ----------------------
D7038 − 15
J2360Lubricating Oil, Gear Multipurpose (Metric) Military 4.4 Storage Phase—Stop the motor at the completion of the
Use motoring phase. Remove the test unit from the motoring rig
5
...
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 − 14 D7038 − 15
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 test method is written for use by laboratories that use the portions of the test method that refer
to ASTM Test Monitoring Center (TMC) services (see Annex A1). 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.
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.
2. Referenced Documents
3
2.1 ASTM Standards:
D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
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 Oct. 1, 2014April 1, 2015. Published October 2014May 2015. Originally approved in 2004. Last previous edition approved in 20132014 as
D7038 – 13.D7038 – 14. DOI: 10.1520/D7038-14.10.1520/D7038-15.
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 14–01.14–2. 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.
3
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.
*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 ----------------------
D7038 − 15
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
2.2 ASTM Standard:
D2
...
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