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  • ASTM
    D7038-13 Standard Test Method for Evaluation of Moisture Corrosion Resistance of Automotive Gear Lubricants
    Edition: 2013
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Description of ASTM-D7038 2013

ASTM D7038 - 13

Standard Test Method for Evaluation of Moisture Corrosion Resistance of Automotive Gear Lubricants

Active Standard ASTM D7038 | Developed by Subcommittee: D02.B0

Book of Standards Volume: 05.04




ASTM D7038

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 test method described in this standard may be used by any properly equipped laboratory, without the assistance of anyone not associated with that laboratory. However, the ASTM Test Monitoring Center (TMC) provides reference oils and an assessment of the test results obtained on those oils by the laboratory (see Annex A7 ). By this means, the laboratory will know whether their use of the test method gives results statistically similar to those obtained by other laboratories. Furthermore, various agencies require that a laboratory utilize the TMC services in seeking qualification of oils against specifications. For example, the U.S. Army imposes such a requirement in connection with several Army lubricating oil specifications.

5.3 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 .

1. 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Society of Automotive Engineers Standards

J2360 Lubricating Oil, Gear Multipurpose (Metric) Military Use

U.S. Military Specifications

MIL-P-3420F NOX-RUST Paper

Keywords

corrosion; final drive axle; gear failure; gears; lubricants; L-33-1; moisture; rust;


ICS Code

ICS Number Code 75.100 (Lubricants, industrial oils and related products)


DOI: 10.1520/D7038-13

ASTM International is a member of CrossRef.

ASTM D7038

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.

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