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ASTM D128-98

Historical Revision

Standard Test Methods for Analysis of Lubricating Grease

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1.1 These test methods for analysis cover greases of the conventional type which consist essentially of petroleum oil and soap. The constituents which can be determined are soap, unsaponifiable matter (petroleum oil, etc.), water, free alkalinity, free fatty acid, fat, glycerin, and insolubles.

Note 1-Any of the test methods described herein are best used by an experienced grease analyst who may also be able to make appropriate adaptations of the techniques as occasion requires.

1.2 A supplementary test method is provided in the Appendix. This test method is intended primarily for application to greases containing thickeners which are essentially insoluble in -hexane, and to greases which cannot be analyzed by conventional methods because of the presence of such constituents as nonpetroleum fluids or nonsoap-type thickeners, or both. In some cases, these constituents can react with strong acid or alkaline solutions.

1.3 These test methods appear in the following order:

Sections Ash Determination 7 to 11 Insolubles, Soap, Fat, Petroleum Oil, 12 to 20 and Unisponifiable Matter Free Alkali and Free Acid 21 to 23 Water 24 Glycerin (Quantitative) 25 to 29

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. For hazard statements, see Notes 3 through 22.

1.5 The values stated in SI units are to be considered the standard.


SDO ASTM: ASTM International
Document Number D128
Publication Date Nov. 10, 1998
Language en - English
Page Count 11
Revision Level 98
Supercedes
Committee D02.G0.01
Publish Date Document Id Type View
July 1, 2024 D0128-24A Revision
June 1, 2024 D0128-24 Revision
Oct. 1, 2014 D0128-98R14E01 Revision
Nov. 10, 1998 D0128-98 Revision
July 1, 2019 D0128-98R19 Reaffirmation
Oct. 1, 2014 D0128-98R14 Reaffirmation
May 1, 2008 D0128-98R08 Reaffirmation
May 10, 2003 D0128-98R03E01 Reaffirmation