1、Designation:D112213Standard Test Method forDensity or Relative Density of Engine Coolant Concentratesand Engine Coolants By The Hydrometer1This standard is issued under the fixed designation D1122;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、of revision,the year of last revision.A number in parentheses 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.1.Scope*1.1 This test method
3、covers the determination of the relativedensity of engine coolant concentrates and engine coolants.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,as
4、sociated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1176 Practice for Sampling and Preparing Aqueous Solu-ti
5、ons of Engine Coolants orAntirusts for Testing PurposesE1 Specification for ASTM Liquid-in-Glass ThermometersE100 Specification for ASTM HydrometersE230 Specification and Temperature-Electromotive Force(EMF)Tables for Standardized Thermocouples3.Terminology3.1 Definitions:3.1.1 relative density,nthe
6、 ratio of the density of amaterial at a stated temperature to the density of water at thesame stated temperature.4.Significance and Use4.1 The relative density of an engine coolant may be used todetermine the approximate percent glycol,freezing point,andboiling point,provided the glycol type is know
7、n.4.2 The relative density of an engine coolant concentratecan be used as a production control test.5.Apparatus5.1 HydrometersHydrometers shall be of glass,graduatedin specific gravity range as listed in Table 1,and shall conformto Specification E100.5.2 Hydrometer CylinderThe hydrometer cylinder in
8、which the sample for the relative density test is confined shallbe made of clear glass and shall be cylindrical in shape.Forconvenience in pouring,it may have a lip on the rim.Theinside diameter of the cylinder shall be at least 25.4 mm(1.0in.)greater than the outside diameter of the hydrometer.Theh
9、eight of the cylinder shall be such that the length of thecolumn of sample it contains is greater by at least 25.4 mm(1.0in.)than the portion of the hydrometer which is immersedbeneath the surface of the sample after a state of equilibriumhas been reached.5.3 Temperature Measuring Instrument(Environ
10、mentallysafe thermometer or thermocouple).An ASTM Partial Immer-sion Thermometer,having a range from 5 to 300C andconforming to the requirements for thermometer 2C or 2F,asprescribed in Specification E1,or some suitable non-mercurycontainingtemperaturemeasuringdevice,suchasathermocouple,capable of o
11、perating in the same temperaturerange and having equal or better accuracy as summarized inSpecification E230.See Section 10,Precision and Bias.Thedata presented in this paragraph is derived using mercury-in-glass thermometers only.5.4 Water BathA water bath capable of maintaining asample temperature
12、 of 15.5 6 0.3C(60 6 0.5F)during thetest.6.Sampling6.1 Sample the coolant in accordance with Test MethodD1176,except as specified in this test method.7.Procedure7.1 If the coolant has a small amount of separated upperlayer,remove it before determining the relative density of the1This test method is
13、under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.03 on Physical Properties.Current edition approved May 1,2013.Published June 2013.Originallyapproved in 1950.Last previous edition approved in 2013 as D1122 08(2013).
14、DOI:10.1520/D1122-13.2For 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 Summary page onthe ASTM website.*A Summary of Changes section appears at the
15、end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 lower layer.To separate,pour the sample into a 500-mLseparatory funnel,allow to stand for 3 h at room temperaturebut not below 20C(68F),and then draw off the lower layer.
16、7.2 If the original coolant is homogeneous,no separationwill be required.7.3 Cool the homogeneous sample or the separated lowerlayer sample to about 14C(57F).Pour the sample into theclean,dry hydrometer cylinder without splashing,so as toreduce to a minimum the formation of air bubbles(see Note 1).Place the cylinder vertically in the water bath and let thetemperature of the sample reach 15.0 6 0.3C(59 6 0.5F).Slowly and carefully lower the hydrometer into the sample toa level two smallest scale
