This practice addresses the evaluation of the foaming tendency of metal working fluids including persistence over time and foam knockdown tendency using recirculation.
foam; foaming; metal working; recirculation; foam knockdown
Many foam test methods provide insight into either foam knockdown or initial foaming behavior of a system. These methods do not always simulate the field application for metal working fluids as they are used over extended periods of time. There is a need for a standard test method in which foam control persistence and knockdown are tested with the ability to alter temperature, water hardness, speed, pressure and filtration depending on the application.
The title and scope are in draft form and are under development within this ASTM Committee.
Developed by Subcommittee: E34.50
Staff Manager: Travis Murdock
Date Initiated: 02-07-2022
Technical Contact: Stefanie Velez