1、Designation:D 4656 98Standard Specification forPrediluted Aqueous Ethylene Glycol Base Engine Coolant(50 Volume%Minimum)for Automobiles and Light-DutyService1This standard is issued under the fixed designation D 4656;the number immediately following the designation indicates the year oforiginal adop
2、tion or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements for a predi-luted aqueous ethylene
3、glycol(50 volume%minimum)baseengine coolant for use in automobiles and light duty vehicles.When used without further dilution,this product functionseffectively during both summer and winter in automotive andother light-duty engine cooling systems to provide adequatecooling system performance.1.2 The
4、 units quoted in this specification are to be regardedas standard.The values given in parentheses are approximateequivalents provided for information purposes only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the us
5、er of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1This specification applies to automobiles and light-dutyservice.A separate specification for a prediluted ethylene glycol basecoolant for heavy-duty
6、engine service is under development with D 5345.2.Referenced Documents2.1 ASTM Standards:D 512 Test Methods for Chloride Ion in Water2D 516 Test Method for Sulfate Ion in Water2D 1119 Test Method for Ash Content of Engine Coolantsand Antirusts3D 1120 Test Method for Boiling Point of Engine Coolants3
7、D 1121 Test Method for Reserve Alkalinity of EngineCoolants and Antirusts3D 1122 Test Method for Density or Relative Density ofEngine Coolant Concentrates and Engine Coolants by theHydrometer3D 1126 Test Method for Hardness in Water2D 1177 Test Method for Freezing Point of Aqueous EngineCoolants3D 1
8、193 Specification for Reagent Water2D 1287 Test Method for pH of Engine Coolants and Anti-rusts3D 1293 Test Methods for pH of Water2D 1384 Test Method for Corrosion Test for Engine Coolantsin Glassware3D 1881 Test Method for Foaming Tendencies of EngineCoolants in Glassware3D 1882 Test Method for Ef
9、fect of Cooling System ChemicalSolutions on Organic Finishes for Automotive Vehicles3D 1888 Test Methods for Particulate and Dissolved Matterin Water4D 2570 Test Method for Simulated Service Corrosion Test-ing of Engine Coolants3D 2809 Test Method for Cavitation Erosion-CorrosionCharacteristics of A
10、luminum Pumps with Engine Cool-ants3D 3306 Specification for Ethylene Glycol Base EngineCoolant for Automobile and Light Duty Service3D 3634 Test Method for Trace Chloride Ion in EngineCoolants3D 4327 Test Method for Anions in Water by ChemicallySuppressed Ion Chromatography2D 4340 Test Method for C
11、orrosion of Cast AluminumAlloys in Engine Coolants Under Heat-Rejecting Condi-tions3D 4725 Terminology for Engine Coolants3D 5345 Specification for PredilutedAqueous Eghylene Gly-col Base Low-Silicate Engine Coolant(50 Volume PercentMinimum)for Heavy-Duty Engines Requiring an InitialCharge of Supple
12、mental Coolant Additive(SCA)3D 5827 Test Method for Analysis of Engine Coolant forChloride and Other Anions by Ion Chromatography3D 5931 Test Method for Density and Relative Density ofEngine Coolant Concentrates and Aqueous Engine Cool-ants by Digital Density Meter33.General Requirements3.1 Predilut
13、ed aqueous ethylene glycol base engine coolantshall consist essentially of water and ethylene glycol and shallcontain suitable corrosion inhibitors,dye and a foam suppres-sor.Other glycols,such as propylene and diethylene,may be1This specification is under the jurisdiction of ASTM Committee D-15 onE
14、ngine Coolants and is the direct responsibility of Subcommittee D15.07 onPrediluted Engine Coolant.Current edition approved April 10,1998.Published December 1998.Originallypublished as D 4656 91.Last previous edition D 4656 95.2Annual Book of ASTM Standards,Vol 11.01.3Annual Book of ASTM Standards,V
15、ol 15.05.4DiscontinutedSee 1990 Annual Book of ASTM Standards,Vol 11.01.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTMNOTICE:This standard has either been superseded and replaced by a new versio
16、n or discontinued.Contact ASTM International(www.astm.org)for the latest information.included up to a maximum of 15%of the glycols contained inthe product,if the chemical and physical properties in Table 1are met.For example,15%of a 50%aqueous glycol solutioncould contain up to 7.5%of glycols other than ethylene glycol.The coolant also shall conform to the general requirements inTable 2.3.2 This product shall be prepared using deionized waterthat meets Type IV reagent water specifications(see Sp
