Standard Test Method for
Foam in Aqueous Media (Blender Test)1
This standard is issued under the fixed designation D 3519; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1.1 This test method covers the measurement of the increase
in the volume of a low-viscosity aqueous liquid (less than 3 CST at
40°C) due to its tendency to foam under high shear conditions.
NOTE 1—Foam under low shear is covered by Test Method D 3601.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific safety
information, see 7.16.
2. Referenced Documents
2.1 ASTM Standards:
D 1126 Test Method for Hardness in Water2
D 3601 Test Method for Foam In Aqueous Media (Bottle
3. Summary of Test Method
3.1 The increase in volume is determined by the increase in
total height of test fluid including foam after blending for 30 s
using a commercial-type blender with glass jar (see Note 2) at
25 6 1°C (77 6 1.8°F) agitating between 4000 and 13 000
rpm. The preferred range would be 8000 6 1000 rpm.
4. Significance and Use
4.1 The results obtained by the test method described are
useful as guides in determining the tendency of a water-based
metalworking coolant to produce foam under high shear
conditions. No correlation with changes in heat transfer,
pumpability, or other factors affected by foam is intended. The
foam produced by any given industrial process depends on the
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