1、Designation:D751820Standard Specification for1,3 Propanediol(PDO)Base Engine Coolant for Automobileand Light-Duty Service1This standard is issued under the fixed designation D7518;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the y
2、ear 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.1.Scope*1.1 This specification covers the requirements for 1,3 pro-panediol base engine coolants used in automobiles or otherli
3、ght-duty service cooling systems.When concentrates are usedat 40%to 70%concentration by volume in water,or whenprediluted glycol base engine coolants(50 volume%mini-mum)are used without further dilution,they will functioneffectively to provide protection against freezing,boiling,andcorrosion.1.2 The
4、 coolants governed by this specification are catego-rized as follows:Coolant TypeDescriptionI1,3 Propanediol base concentrateII1,3 Propanediol predilute(50 vol%)NOTE1This specification is based on the knowledge of the perfor-mance of engine coolants prepared from new or virgin ingredients.NOTE2This
5、specification applies to automobiles and light-dutyservice.A specification for heavy-duty engine service is under develop-ment.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standa
6、rd.1.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1
7、.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to T
8、rade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D512 Test Methods for Chloride Ion In WaterD516 Test Method for Sulfate Ion in WaterD1119 Test Method for Percent Ash Content of EngineCoolantsD1120 Test Method for Boiling Point of Engine CoolantsD1121 Test Method for Reserve Alkalinity o
9、f Engine Cool-ants and AntirustsD1122 Test Method for Density or Relative Density ofEngine Coolant Concentrates and Engine Coolants By TheHydrometerD1123 Test Methods for Water in Engine Coolant Concen-trate by the Karl Fischer Reagent MethodD1126 Test Method for Hardness in WaterD1177 Test Method f
10、or Freezing Point of Aqueous EngineCoolantsD1287 Test Method for pH of Engine Coolants andAntirustsD1293 Test Methods for pH of WaterD1384 Test Method for Corrosion Test for Engine Coolantsin GlasswareD1881 Test Method for Foaming Tendencies of EngineCoolants in GlasswareD1882 Test Method for Effect
11、 of Cooling System ChemicalSolutions on Organic Finishes for Automotive VehiclesD2570 Test Method for Simulated Service Corrosion Testingof Engine CoolantsD2809 Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With En-gine CoolantsD3321 Test Method for Use
12、 of the Refractometer for FieldTest Determination of the Freezing Point of AqueousEngine CoolantsD3634 Test Method for Trace Chloride Ion in Engine Cool-antsD4327 Test Method for Anions in Water by Suppressed IonChromatography1This specification is under the jurisdiction ofASTM Committee D15 on Engi
13、neCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.07 on Specifications.Current edition approved April 1,2020.Published April 2020.Originallyapproved in 2009.Last previous edition approved in 2015 as D751810(2015)1.DOI:10.1520/D751820.2For referenced ASTM standards,vis
14、it 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 end of this standardCopyright ASTM International,100 Ba
15、rr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommenda
16、tions issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.D4340 Test Method for Corrosion of Cast Aluminum Alloysin Engine Coolants Under Heat-Rejecting ConditionsD4725 Terminology for Engine Coolants and Related FluidsD5827 Test Method for Analysis of Engine Coolant forChloride and Other Anions by Ion ChromatographyD5931 Test Method for Density and Relative Density ofEngine Coolant Concentrates and Aqueous Engine Cool-ants by Digital Density MeterD6130 Test Method f
