Standard Test Method for Foaming Tendencies of Engine Coolants in Glassware

This test method covers a simple glassware test for evaluating the tendency of engine coolants to foam under laboratory-controlled conditions of aeration and temperature.

ASTM D1881 measures the foaming tendency and foam stability of:

• Engine coolants
• Antifreeze concentrates
• Engine coolant mixtures

And determines both Foam volume immediately after aeration and Foam volume after a specified settling time.

Foaming in cooling systems can cause:

• Air pockets
• Reduced heat transfer
• Cavitation
• Pump inefficiency
• Engine overheating

A good coolant should produce minimal foam and allow foam to collapse quickly.

A measured volume of coolant is placed in a graduated glass cylinder and this sample is maintained at a specified temperature. Air than is introduced at a controlled flow rate for a defined time. Than the foam height is both measured immediately after aeration and after a settling period (usually seconds).

Foam volume (mL) at end of aeration and Foam volume (mL) after settling time is reported Uses glassware apparatus

The setup includes a controlled airflow system with a filter set for the used air. Both the diffusers (Stone or MOTT type) and the flow tubes are calibrated and provided with a work certificate. The measured values ​​are traceable to the national standard.

The difference between ASTM D1881, D8740 and D892

• Tamson Foaming Dual Bath 230V/50-60Hz (P/N: 00T0330)
• Tamson Foaming Dual Bath 115V/60Hz (P/N: 00T0331)

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