BT-30 Navistar Foam Test With Water
Lubricants used in transportation and other applications reduce friction to ensure a smooth ride. If the lubricant foams due to excessive aeration, fluid contamination or additive depletion, it may reduce lubricating properties. Severe foaming can lessen thermal conductivity and increase oxidation as well as result in cavitation and starvation of lubrication in critical areas. Foaming tendencies may be increased in the presence of water such as that which arises from environmental exposure or condensation. This test determines foaming tendencies in lubricants in the presence of small amounts of water.
Water is added to the sample, the mixture is agitated and the foaming is tested as per ASTM D892. Results are reported as per ASTM D892