1、Designation: D1120 111Standard Test Method forBoiling Point of Engine Coolants1This standard is issued under the fixed designation D1120; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parent
2、heses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1NOTEEditorial corrections were made in July 2011.1. Scope*1.1 This test method co
3、vers the determination of the equi-librium boiling point of engine coolants. The equilibriumboiling point indicates the temperature at which the sample willstart to boil in a cooling system under equilibrium conditions atatmospheric pressure.NOTE 1Engine coolants may also be marketed in a ready-to-u
4、se form(prediluted). This test procedure is applicable to diluted solutions as wellas to concentrates.NOTE 2The procedure for obtaining a representative test sample of acoolant solution that contains an antileak additive is found in Test MethodD1176.1.2 The values stated in SI units are to be regard
5、ed asstandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine th
6、e applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1176 Practice for Sampling and Preparing Aqueous Solu-tions of Engine Coolants or Antirusts for Testing PurposesE1 Specification for ASTM Liquid-in-Glass ThermometersE230 Specification and Temperature
7、-Electromotive Force(EMF) Tables for Standardized Thermocouples3. Summary of Test Method3.1 Sixty millilitres (two ounces) of the sample are boiledunder equilibrium conditions at atmospheric pressure in a100-mL flask. The temperature of the liquid corrected forbarometric pressure is the boiling poin
8、t.4. Apparatus (see Fig. 1)4.1 FlaskA 100-mL round-bottom, short-neck, heat-resistant glass flask having a neck with a1938 standard-taper,female ground-glass joint and a 10-mm (0.4-in) outside diam-eter side-entering tube, so located as to permit the end of thethermometer device to be directly cente
9、red in the flask 6.5 mm(0.26 in.) from the bottom. The flask is shown in Fig. 2.4.2 CondenserThe condenser shall be of the water-cooled, reflux, glass-tube type, having a condenser jacket 200mm (7.9 in.) in length. The bottom end of the condenser shallhave a1938 standard-taper, drip-tip, male ground
10、-glass joint.4.3 Boiling Stones Three or four silicon carbide grains,grit No. 8 or other suitable inert chips, shall be used for eachdetermination. For samples exhibiting heavy foam, moreboiling chips may be added.4.4 Temperature Measuring Instrument (EnvironmentallySafe Thermometer or Thermocouple)
11、An ASTM Partial Im-mersionThermometer, having a range from 5 to 300C (20 to580F) and conforming to the requirements for Thermometer2C or 2F, as prescribed in Specification E1, or some othersuitable non-mercury containing temperature measuring de-vice, such as a thermocouple, capable of operating in
12、the sametemperature range and having equal or better accuracy assummarized in Specification E230. See Section 10, Precisionand Bias. The data presented in this paragraph is derived usingmercury-in-glass thermometers only.4.5 Heat Source A suitable electric heating mantle shallbe used, such that suff
13、icient heat can be obtained to complywith the heating and refluxing rates specified in Section 7.5. Sample5.1 To obtain a sample of unused concentrated coolant forboiling point determination, the following procedure is sug-gested:5.1.1 Allow material as received in the original container tocome to r
14、oom temperature 20C (68F) but not below 20Cminimum).1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.03 on PhysicalProperties.Current edition approved March 1, 2011. Published March 2011. Originallyapproved in 19
15、50 as D1120 50 T. Last previous edition approved in 2008 asD1120 08. DOI: 10.1520/D1120-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Su
16、mmary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.2 Shake the container to mix any material that may haveseparated.5.1.3 Immediately re
17、move desired sample for test require-ment.5.2 To prepare a dilute solution of any mixture, thoroughlymix the sample, pipet the required volume into a calibratedvolumetric flask, and add distilled water to bring the mixedcontents of the flask to the proper volume while maintainingthe calibration temp
18、erature.5.3 The procedure for obtaining a representative test sampleof a coolant solution that contains an antileak additive is foundin Test Method D1176.6. Preparation of Apparatus6.1 Use a calibrated temperature measuring instrument(thermometer or thermocouple).6.2 Insert the calibrated temperatur
19、e measuring instrumentthrough the side tube until the tip of the bulb is 6.5 mm (0.26in.) from the bottom of the center of the flask. Make a sealaround the temperature measuring instrument with a shortpiece of rubber tubing or other suitable material.6.3 Place 60 mL (2 oz) of the sample to be tested
20、, togetherwith three or four silicon carbide grains, into the flask.6.4 Attach the chemically cleaned condenser to the flask andmount the flask in an appropriate heating mantle. Support theglassware by a laboratory-type ring support and stand. Thewhole assembly is held in place by a clamp. Connect t
21、hecooling water inlet and outlet tubes to the condenser.7. Procedure7.1 When assembled as shown in Fig. 1, turn on thecondenser water and apply heat by means of an electric heaterat such a rate that the sample is brought to its boiling pointwithin 15 min. Heat strongly until boiling is reached and t
22、henreduce heat input slowly until the required reflux rate isobtained. Adjust the rate of reflux over the next 10-min periodto 1 to 2 drops of reflux per second. To obtain accurate results,it is important to carefully observe the specified reflux rate andmaintain the proper reflux rate for 2 min bef
23、ore reading thetemperature.7.2 Record the observed temperature and the barometricpressure.8. Calculation8.1 Temperature Measuring Instrument InaccuracyCorrect the observed temperature by applying the correctionfactor obtained in calibrating the thermometer or thermocouplefor inaccuracy (6.1).8.2 Var
24、iation from Standard Barometric PressureThiscorrection shall be applied to the observed temperature aftercorrection for inaccuracy of the thermometer. Use Table 1 todetermine the barometric correction.9. Report9.1 Report the following information:9.1.1 The equilibrium boiling point as the observed t
25、em-perature rounded off to the nearest 0.3C (0.5F), corrected forthermometer or thermocouple inaccuracy and barometric pres-sure.10. Precision and Bias10.1 Precision:10.1.1 Reproducibility For diluted samples boiling below100C (212F), results should not differ from each other byFIG. 1 Boiling Point
26、Test ApparatusFIG. 2 Short-Neck Flask, 100 mLD1120 1112more than 1.4C (2.5F) and, for samples boiling above 100C(212F), results should not differ from each other by more than2.5C (4.5F).10.1.2 For unused concentrated samples boiling below100C (212F), results should not differ from each other bymore
27、than 1.4C (2.5F), and for samples boiling above 100C(212F), results should not differ by more than 5.6C (10F).10.2 BiasSince there is no accepted reference materialsuitable for determining the bias for the procedure in this testmethod, bias has not been determined.11. Keywords11.1 boiling point; eng
28、ine coolantSUMMARY OF CHANGESSubcommittee D15.03 has identified the location of selected changes to this standard since the last issue(D1120-08) that may impact the use of this standard.(1) Replaced the term 9thermometer9 with 9temperature mea-suring instrument or thermocouple9 throughout.ASTM Inter
29、national takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely
30、their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand shou
31、ld be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Stan
32、dards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-
33、832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Corrections for Barometric PressureAObserved TemperatureCorrected for
34、TemperatureMeasuring InstrumentInaccuracyCorrection per 1-mm HgDifference in PressureBC FUnder 100C (212F) 0.03 0.06100C (212F) to 190C (374F) 0.04 0.07Over 190C (374F) 0.04 0.08AThis table is an approximation based on the Sydney Young equation, asfollows:Cc= 0.000095 (760 6 P) (273 6 tc)where:Cc= c
35、orrection to be added to the observed temperature, tc, andP = actual barometric pressure in millimetres of mercury.The corresponding equation for the correction of a Fahrenheit temperaturemeasuring instrument is as follows:Cf= 0.000095 (760 6 P) (460 6 tf) where:Cf= correction to be added to the observed temperature, tf.BTo be added in case barometric pressure is below 760 mm; to be subtractedin case barometric pressure is above 760 mm.D1120 1113
