ASTM D3601 Standard Test Method for Foam In Aqueous Media (Bottle Test)
3. Summary of Test Method
3.1 The increase in volume is determined by the increase in total height of the test fluid, including foam, after vigorous shaking of the emulsion at 25 +/- 1°C (77 +/- 1.8°F).
NOTE 2 - Water that is normally used to reduce the concentrate to a working consistency can be used. However, if this type of water is not desirable or available, two other types ofwater may be used to prepare the test liquid: (1) distilled water or (2) distilled water with a subsequent seeding of the test liquid with synthetic hard water.
4. Significance and Use
4.1 The results obtained by this test method are useful as guides in determining the tendency of a water-based metal-working coolant to produce foam under low shear conditions. No correlation with changes in heat transfer, pumpability, or other factors affected by foam is intended. The foam generated by any given industrial process depends on the method by which the foam is generated and may not be directly proportional to that produced by this controlled laboratory test method. Further, the foam generated at the specified test temperature will not necessarily predict the foaming tendency of the liquid (that is, metalworking coolant) at some other use temperature.
