ASTM D1120 standard test method for boiling point of engine coolants
4. Apparatus (Fig. 1)
4.1 Flask - A 100-mL round-bottom, short-neck, heat-resistant glass flask having a neck with a 19/38 standard-taper, female ground-glass joint and a 10-mm (0.4-in) outside diameter side-entering tube, so located as to permit the end of the thermometer bulb to be directly centered in the flask 6.5 mm (0.26 in.) from the bottom. The flask is shown in Fig. 2.
4.2 Condenser - The condenser shall be of the water-cooled, reflux, glass-tube type, having a condenser jacket 200 mm (7.9 in.) in length. The bottom end of the condenser shall have a 19/38 standard-taper, drip-tip, male ground-glass joint.
4.3 Boiling Stones - Three or four silicon carbide grains, grit No. 8 or other suitable inert chips, shall be used for each determination. For samples exhibiting heavy foam, more boiling chips may be added.
4.4 Thermometer - An ASTM Partial Immersion Thermometer, having a range from - 5 to + 300°C (20 to 580°F) and conforming to the requirements for Thermometer 2C or 2F, as prescribed in Specification E 1.
4.5 Heat Source - A suitable electric heating mantle shall be used, such that sufficient heat can be obtained to comply with the heating and refluxing rates specified in Section 7.
5. Sample
5.1 To obtain a sample of unused concentrated coolant for boiling point determination, the following procedure is suggested:
5.1.1 Allow material as received in the original container to come to room temperature (20°C (68° F) but not below 20°C minimum).
5.1.2 Shake the container to mix any material that may have separated.
5.1.3 Immediately remove desired sample for test requirement.
5.2 To prepare a dilute solution of any mixture, thoroughly mix the sample, pipet the required volume into a calibrated volumetric flask, and add distilled water to bring the mixed contents of the flask to the proper volume while maintaining the calibration temperature.
5.3 The procedure for obtaining a representative test sample of a coolant solution that contains an antileak additive is found in Test Method D1176.
