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ASTM D7038-07a

Historical Revision

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

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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. This test method is commonly referred to as the L-33-1 test.

1.2 The values for temperature stated as degrees Fahrenheit, for pressure stated as psi, and volume stated as fluid ounces are to be regarded as standard. The SI values given in the parentheses are provided for informational purposes 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.

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.

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.

The L-33-1 test procedure is used or referred to in the following documents: ASTM Publication STP-512A, SAE J308, SAE J2360, and U.S. Military Specification MIL-PRF-2105E.

SDO ASTM: ASTM International
Document Number D7038
Publication Date Nov. 1, 2007
Language en - English
Page Count 26
Revision Level 07a
Supercedes
Committee D02.B0
Publish Date Document Id Type View
Dec. 1, 2024 D7038-24A Revision
May 1, 2024 D7038-24 Revision
Nov. 1, 2023 D7038-23 Revision
July 1, 2022 D7038-22A Revision
April 1, 2022 D7038-22 Revision
July 1, 2021 D7038-21A Revision
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July 1, 2020 D7038-20 Revision
May 1, 2019 D7038-19 Revision
Oct. 1, 2018 D7038-18A Revision
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May 1, 2004 D7038-04 Revision