1、Designation:D257010Standard Test Method forSimulated Service Corrosion Testing of Engine Coolants1This standard is issued under the fixed designation D2570;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A n
2、umber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method evaluates the effect of a circulatingengine coolant on metal test specimens and automotive coolingsystem components under c
3、ontrolled,essentially isothermallaboratory conditions.1.2 This test method specifies test material,cooling systemcomponents,type of coolant,and coolant flow conditions thatare considered typical of current automotive use.1.3 The values stated in foot-pound-second units are to beregarded as the stand
4、ard.The values given in parentheses(SIunits)are approximate equivalents for information only.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 and health practic
5、es and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 6.2.Referenced Documents2.1 ASTM Standards:2D1121 Test Method for Reserve Alkalinity of Engine Cool-ants and AntirustsD1176 Practice for Sampling and Preparing Aqueous S
6、olu-tions of Engine Coolants orAntirusts for Testing PurposesD1193 Specification for Reagent WaterD1287 Test Method for pH of Engine Coolants andAntirustsD1384 Test Method for Corrosion Test for Engine Coolantsin GlasswareD2758 Test Method for Engine Coolants by Engine Dyna-mometerD2847 Practice for
7、 Testing Engine Coolants in Car and LightTruck ServiceD3306 Specification for Glycol Base Engine Coolant forAutomobile and Light-Duty ServiceD4985 Specification for Low Silicate Ethylene Glycol BaseEngine Coolant for Heavy Duty Engines Requiring aPre-Charge of Supplemental Coolant Additive(SCA)2.2 S
8、AE Standard:3SAE J20e Standard for Coolant System Hoses2.3 ASTM Adjuncts:Coolant reservoir(1 drawing)Framework for test equipment(3 drawings and B/M)3.Summary of Test Method3.1 An engine coolant is circulated for 1064 h at 190F(88C)in a flow loop consisting of a metal reservoir,anautomotive coolant
9、pump,an automotive radiator,and connect-ing rubber hoses.Test specimens representative of enginecooling system metals are mounted inside the reservoir,whichsimulates an engine cylinder block.At the end of the testperiod,the corrosion-inhibiting properties of the coolant aredetermined by measuring th
10、e mass losses of the test specimensand by visual examination of the interior surfaces of thecomponents.4.Significance and Use4.1 This test method,by a closer approach to engine coolingsystem conditions,provides better evaluation and selectivescreening of engine coolants than is possible from glasswa
11、retesting(Test Method D1384).The improvement is achieved bycontrolled circulation of the coolant,by the use of automotivecooling system components,and by a greater ratio of metalsurface area to coolant volume.4.2 Althoughthistestmethodprovidesimproveddiscrimination,it cannot conclusively predict sat
12、isfactory cor-rosion inhibition and service life.If greater assurance ofsatisfactory performance is desired,it should be obtained fromfull-scale engine tests(Test Method D2758)and from fieldtesting in actual service(Practice D2847).4.3 Significance and interpretation of the test and its limi-tations
13、 are discussed further in Appendix X1.1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.09 on SimulatedService Tests.Current edition approved Dec.1,2010.Published January 2011.Originallyapproved in 1966.Last previ
14、ous edition approved in 2009 as D2570-09.DOI:10.1520/D2570-10.2For 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.3Ava
15、ilable from Society of Automotive Engineers,400 Commonwealth Dr.,Warrendale,PA 15096.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.4 If this test method is used as a qualification test forSpecification D3306 and Specification D4985,th
16、e recom-mended components listed in Section 5 shall be used.If it is notbeing used for such qualification purposes,then suitablesubstitution components may be used,if agreed upon betweenthe contracting parties.5.Apparatus5.1 ReservoirAn assembly drawing of this component4isshown in Fig.1.The material of construction,representing thatof the engine cylinder block,shall be SAE G3500 Gray Iron forAutomotive Castings.5Install a right angle fitting on the top ofthe reservoir for attachment of an air l
