Normativa De Astm

Designation: D 1120 – 94 (Reapproved 2004)

Standard Test Method for

Boiling Point of Engine Coolants1
This standard is issued under the fixed designation D 1120; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of 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. This standard has been approved for use by agencies of the Department of Defense.

1. Scope 1.1 This test method covers the determination of the equilibrium boiling point of engine coolants. The equilibrium boiling point indicates the temperature at which the sample will start to boil in a cooling system under equilibriumconditions at atmospheric pressure.
NOTE 1—Engine coolants may also be marketed in a ready-to-use form (prediluted). This test procedure is applicable to diluted solutions as well as to concentrates. NOTE 2—The procedure for obtaining a representative test sample of a coolant solution that contains an antileak additive is found in Test Method D 1176.

1.2 The values stated in SI units are to beregarded as standard. The values given in parentheses are for information only. 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. 2. Referenced Documents 2.1 ASTMStandards: 2 D 1176 Test Method for Sampling and Preparing Aqueous Solutions of Engine Coolants or Antirusts for Testing Purposes E 1 Specification for ASTM Thermometers 3. Summary of Test Method 3.1 Sixty millilitres (two ounces) of the sample are boiled under equilibrium conditions at atmospheric pressure in a 100-mL flask. The temperature of the liquid corrected for barometric pressure is theboiling point.

4. Apparatus (Fig. 1) 4.1 Flask—A 100-mL round-bottom, short-neck, heatresistant 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.3 The flask is shown in Fig. 2. 4.2Condenser—The condenser shall be of the watercooled, 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,4 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 inSection 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 testrequirement. 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

1 This test method is under the jurisdiction of ASTM Committee D15 on Engine Coolants and is the direct responsibility of Subcommittee D15.03 on Physical Properties. Current edition approved May 1, 2004....