ASTM D1881 & D7840

 ASTM D1881 covers the determination of the foaming characteristics of engine coolants under laboratorycontrolled-conditions of aeration and temperature. The test method generally will distinguish coolants that have a tendency to foam excessively from those that are suitable for further evaluation to determine performance in actual service. ASTM D7840 is the test method for foaming tendencies of non-aqueous engine coolants in glassware.