1、Designation:D 6257 98Standard Specification forPrediluted Aqueous Propylene Glycol Base Engine Coolant(50 Volume%Minimum)for Automobile and Light-DutyService1This standard is issued under the fixed designation D 6257;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 propylene
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.NOTE1T
4、his specification is based on the knowledge of the perfor-mance of engine coolants prepared from new or virgin ingredients.SeeAppendix X3 for more information.1.2 The units quoted in this specification are to be regardedas standard.The values given in parentheses are approximateequivalents provided
5、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 user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations p
6、rior to use.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 Coolants3D 1121 Test Method for Reserve Alkal
7、inity 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 1193 Specification for Reagent Water2
8、D 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 Effect of Cooling System ChemicalSolut
9、ions 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 Aluminum Pumps with Engine Cool-ants3
10、D 3634 Test Method for Trace Chloride Ion in EngineCoolants3D 4327 Test Method for Anions in Water by ChemicallySuppressed Ion Chromatography3D 4340 Test Method for Corrosion of Cast AluminumAlloys in Engine Coolants Under Heat-Rejecting Condi-tions3D 4725 Terminology for Engine Coolants3D 5216 Stan
11、dard Specification for Propylene Glycol BaseEngine Coolant for Automobile and Light-Duty Service3D 5223 Standard Specification for Engine Coolant GradePropylene Glycol3D 5827 Standard Test Method for Analysis of Engine Cool-ant for Chloride and Other Anions by Ion Chromatogra-phy3D 5931 Standard Tes
12、t Method for Density and RelativeDensity of Engine Coolant Concentrates and AqueousEngine Coolants by Digital Density Meter33.General Requirements3.1 Prediluted aqueous propylene glycol base engine cool-ant shall be formulated with propylene glycol meeting Speci-fication D 5223,water,and shall conta
13、in appropriate corrosioninhibitors,dye,and a foam suppressor.Glycols other thanpropylene glycol may be present but their combined total must1This specification is under the jurisdiction ofASTM Committee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.07 on Specifications.C
14、urrent edition approved April 10,1998.Published November 1998.2Annual Book of ASTM Standards,Vol 11.01.3Annual Book of ASTM Standards,Vol 15.05.4Discontinued 1991-See 1990 Annual Book of ASTM Standards,Vol.11.01.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 1942
15、8Reprinted from the Annual Book of ASTM Standards.Copyright ASTMNOTICE:Thisstandardhaseitherbeensupersededandreplacedbyanewversionordiscontinued.ContactASTMInternational(www.astm.org)forthelatestinformation.be no greater than 0.5%by volume.The prediluted coolantshall also conform to the general requ
16、irements in Table 1.3.2 This product shall be prepared using water that meetsType IV reagent water specifications(see SpecificationD 1193).Use of this water minimizes the formation of hardwater scale and avoids the introduction of mineral components,such as chlorides and sulfates,which can increase the corrosionrate of aluminum and iron.3.3 This product,when installed in accordance with thevehicle manufacturers recommendations and those on theproduct label,shall be suitable for use in a properly