ASTM D2595 Test Method for Evaporation Loss of Lubricating Greases
ASTM D2595 Standard Test Method for Evaporation Loss of Lubricating Greases Over Wide-Temperature Range
1. Scope
1.1 This test method covers the determination of evaporation loss of lubricating greases at temperatures between 93 and 316°C (200 and 600°F). This test method is intended to augment Test Method D 972, which is limited to 149°C (300°F).
1.2 The values stated in SI units are to be regarded as the standard.
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. For specific safety information, see 5.2.
2. Referenced Documents
2.1 ASTM Standards:
A 240 Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels
D217 Test Methods for Cone Penetration of Lubricating Grease
D972 Test Method for Evaporation Loss of Lubricating Greases and Oils
E 1 Specification for ASTM Thermometers
3. Terminology
3.1 Definitions:
3.1.1 lubricating grease, n - a semi-fluid to solid product of a thickener in a liquid lubricant.
3.1.1.1 Discussion - The dispersion of the thickener forms a two-phase system and immobilizes the liquid lubricant by surface tension and other physical forces. Other ingredients are commonly included to impart special properties.
3.1.2 thickener, n - a substance composed of finely-divided particles dispersed in a liquid to form the product's structure.
3.1.2.1 Discussion - Thickeners can be fibers (such as various metallic soaps) or plates or spheres (such as certain non-soap thickeners), which are insoluble or, at most, only very slightly soluble in the liquid lubricant. The general requirements are that the solid particles are extremely small, uniformly dispersed, and capable of forming a relatively stable, gel-like structure with the liquid lubricant.
