ASTM D6082 High Temperature Foaming Characteristics of Lubricating Oils
Lubricants in high speed gears, high volume pumping and splash lubricating systems may be exposed to high temperatures and rapid agitation, potentially incorporating air and resulting in foam formation. This test determines the amount of foam that forms when a fluid, especially a motor oil or transmission fluid, is exposed to high temperature.
The sample is measured into a large graduated cylinder, brought to the test temperature and air is bubbled through the sample for the test time. The amount of static foam and kinetic foam that forms, total and percent volume increase and the foam collapse time are reported.