1、Designation: D6471 10Standard Specification forRecycled Prediluted Aqueous Glycol Base Engine Coolant(50 Volume % Minimum) for Automobile and Light-DutyService1This standard is issued under the fixed designation D6471; the number immediately following the designation indicates the year oforiginal ad
2、option or, in the case 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.1. Scope*1.1 This specification covers the requirements for a recycledprediluted a
3、queous ethylene glycol (50 volume % minimum)base engine coolant and recycled prediluted aqueous propyleneglycol (50 volume % minimum) base engine coolant for use inautomobiles and light-duty vehicles. Committee D15 hasdeveloped this specification using experience, knowledge andresearch from recyclin
4、g used aqueous base engine coolant andblends of used aqueous base engine coolant and virgin glycol.This standard does not apply to coolant produced from otherglycol sources such as medical waste, distillation bottoms,airplane/airport deicers and polyester production waste. Thisspecification provides
5、 a procedure for evaluating engine cool-ant recycling technologies through the recycling of a referencesynthetic used engine coolant. It also specifies the chemical,physical, and performance requirements for the recycled pre-diluted aqueous glycol base engine coolant that is producedfrom that proced
6、ure. When used without further dilution, thisproduct functions effectively during both winter and summer.This material is intended to provide protection against freezing,boiling, and corrosion in automobile or other light-duty servicecooling systems.1.2 The values stated in SI units are to be regard
7、ed as thestandard. The values given in parentheses are approximateequivalents and provided for information 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 saf
8、ety and health practices and determine the applica-bility of regulatory limitations prior to use.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
9、 for Boiling Point of Engine CoolantsD1121 Test Method for Reserve Alkalinity of Engine Cool-ants and AntirustsD1122 Test Method for Density or Relative Density ofEngine Coolant Concentrates and Engine Coolants By TheHydrometerD1126 Test Method for Hardness in WaterD1176 Practice for Sampling and Pr
10、eparing Aqueous Solu-tions of Engine Coolants or Antirusts for Testing PurposesD1177 Test Method for Freezing Point of Aqueous EngineCoolantsD1193 Specification for Reagent WaterD1287 Test Method for pH of Engine Coolants and Anti-rustsD1293 Test Methods for pH of WaterD1384 Test Method for Corrosio
11、n Test for Engine Coolantsin GlasswareD1881 Test Method for Foaming Tendencies of EngineCoolants in GlasswareD1882 Test Method for Effect of Cooling System ChemicalSolutions on Organic Finishes for Automotive VehiclesD2570 Test Method for Simulated Service Corrosion Test-ing of Engine CoolantsD2809
12、Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With En-gine CoolantsD2847 Practice for Testing Engine Coolants in Car andLight Truck ServiceD3306 Specification for Glycol Base Engine Coolant for1This specification is under the jurisdiction ofASTM Committ
13、ee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.15 on RecycledEngine Coolant.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1999. Last previous edition approved in 2006 as D647106. DOI:10.1520/D6471-10.2For referenced ASTM standards, v
14、isit 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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internationa
15、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Automobile and Light-Duty ServiceD3634 Test Method for Trace Chloride Ion in EngineCoolantsD4327 Test Method for Anions in Water by ChemicallySuppressed Ion ChromatographyD4340 Test Method for Corrosion of CastAlu
16、minumAlloysin Engine Coolants Under Heat-Rejecting ConditionsD5827 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 MeterD6129
17、Test Method for Silicon in Engine Coolant Concen-trates by Atomic Absorption SpectroscopyD6130 Test Method for Determination of Silicon and OtherElements in Engine Coolant by Inductively CoupledPlasma-Atomic Emission SpectroscopyD6208 Test Method for Repassivation Potential of Alumi-num and Its Allo
18、ys by Galvanostatic MeasurementD6472 Specification for Recycled Glycol Base EngineCoolant Concentrate for Automobile and Light-Duty Ser-viceD6660 Test Method for Freezing Point ofAqueous EthyleneGlycol Base Engine Coolants by Automatic Phase Transi-tion Method2.2 Other Documents:Federal Method 2540B
19、 Total Dissolved Solids Dried at103105C3GM 6043MAutomotive Engine Coolant ConcentrateEthylene Glycol Type4GM 1825MAutomotive Engine Coolant ConcentrateEthylene Glycol; 3.11 Storage Stability and Compatibil-ity53. Reagents and Materials3.1 Purity of ReagentsReagent grade chemicals shall beused in all
20、 tests. Unless otherwise indicated, it is intended thatall reagents conform to the specifications of the Committee onAnalytical Reagents of the American Chemical Society wheresuch specifications are available.6Other grades may be used,provided it is first ascertained that the reagent is of sufficien
21、tlyhigh purity to permit its use without lessening the accuracy ofthe determination.3.2 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean reagent water as definedby Type IV of Specification D1193.4. Procedure4.1 In order to properly evaluate a coolant recyclin
22、g tech-nology, a reference synthetic used coolant (Annex A1)istobeused as the feed stock. The reference synthetic used coolantshall be prepared in accordance with Annex A1. An appropri-ately sized batch of reference synthetic used coolant is to beprepared and used to purge the recycling process comp
23、onentsand yield enough consistent product to complete the testingspecified within this specification.4.2 Prepare the coolant recycling equipment or technologyaccording to the manufacturers directions and recommenda-tions.4.3 Vigorously stir or mix the reference synthetic usedcoolant using appropriat
24、e vessels and mixing equipment im-mediately prior to and during the processing through thecoolant recycling process.4.4 Recycle the reference synthetic used coolant accordingto the manufacturers directions and recommendations.4.5 Evaluate the recycled coolant per the requirements listedin this speci
25、fication.5. General Requirements5.1 The recycled prediluted aqueous glycol base enginecoolant shall consist essentially of water and ethylene glycol orpropylene glycol obtained from the processing of light, me-dium or heavy duty engine coolant products. The recycledprediluted aqueous glycol base eng
26、ine coolant can in partcontain virgin glycol. . It also shall contain suitable corrosioninhibitors and a foam suppressor.5.1.1 Recycled prediluted aqueous ethylene glycol baseengine coolant may contain glycols other than ethylene glycolup to 7.5 % provided the chemical and physical properties ofTabl
27、e 1 are met.5.1.2 Recycled prediluted aqueous propylene glycol baseengine coolant may contain glycols other than propylene glycolup to 0.5 % provided the chemical and physical properties ofTable 1 are met.5.2 The recycled prediluted aqueous glycol base enginecoolant shall conform to the chemical and
28、 physical propertiesin Table 1. If the recycled prediluted aqueous glycol baseengine coolant contains chloride or sulfate, or both, at levelsgreater than the requirements specified in Table 1, fleet testingrequirements described in Section 6 shall be met. If thechloride and sulfate requirements in T
29、able 1 are met, fleettesting is not required.NOTE 1The intention of conducting fleet testing is to verify that theeffects of residual contaminants left in the recycled glycol base enginecoolant are neutralized through real world application in a fleet test. Dueto the fact that there are not enough i
30、ndustry field test data available tosupport setting hard specification limits, the fleet test requirements inSection 6 specify a protocol and limits based on comparing the recycledglycol base engine coolant to an industry standard reference enginecoolant that is known to adequately protect modern da
31、y cooling systemsfrom corrosion.5.3 The recycled prediluted aqueous glycol base enginecoolant shall conform to the general requirements in Table 2.5.4 The recycled prediluted aqueous glycol base enginecoolant shall be in accordance with the performance require-ments in Table 3.5.5 This product, when
32、 installed in accordance with therecommendations of the manufacturer of the vehicle, or thecoolant recycling process, and those on the product label, shall3Standard Method for the Examinaiton of Water and Wastewater. AmericanPublic Health Association, et al, 1015 15th Street, N.W. Washington, DC 200
33、05.4Applicable rewrite available in Annex A2.5Applicable rewrite available in Annex A3.6Reagent Chemicals, American Chemical Society Specifications , AmericanChemical Society, Washington, DC. For suggestions on the testing of reagents notlisted by the American Chemical Society, see Analar Standards
34、for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia andNational Formulary, U.S. Pharmacopeial Convention, Inc., (USPC), Rockville, MD.D6471 102be suitable for use in a properly maintained cooling system (seeAppendix X1) in normal light-duty or passenger car ser
35、vice fora minimum of one year without adversely affecting fluid flowand heat transfer.6. Fleet Testing Requirements6.1 Engine CoolantsReference engine coolant concen-trate (Annex A2) and recycled prediluted engine coolant shallbe used to conduct the fleet testing.6.2 VehiclesA minimum of fourteen ve
36、hicles is recom-mended to start the test: seven containing reference enginecoolant concentrate (control vehicles) and seven containingrecycled prediluted engine coolant (test vehicles). A minimumof five control vehicles and five test vehicles shall finish thetest. Starting with fourteen vehicles all
37、ows for vehicles to dropout of the test for various reasons, that is, mechanical failure,coolant contamination, etc.6.2.1 Vehicle SelectionAll vehicle cooling systems shouldbe inspected prior to selection. Vehicles with corroded coolingsystems should not be used for testing purposes. Vehicleselectio
38、n shall be made as follows:6.2.1.1 Control vehicles and test vehicles shall be matchedpairs and be new or have similar low mileage accumulation.6.2.1.2 Same year, make, and model.6.2.1.3 Similar mileage and cooling system condition.6.2.1.4 Same cooling system and power train configuration.6.2.1.5 Al
39、uminum head(s), aluminum radiator, aluminumheater core and aluminum water pump (housing).6.2.1.6 Cast iron block (optional).NOTE 2Vehicles equipped with cast iron heads may be tested inaddition to those specified above. A minimum of five control vehicles andfive test vehicles, equipped with aluminum
40、 heads, shall complete the testand be included in the conclusive analysis report.6.2.2 Vehicle SetupAll vehicles shall be set up in accor-dance with Practice D2847 unless otherwise specified withinthis specification.6.2.2.1 All vehicles shall be set up with a new aluminumhead(s), aluminum radiator,
41、aluminum water pump, thermostat,hoses, belts and radiator/cooling system cap. Installation ofnew heater cores is recommended. New aluminum heads andradiators are required as they will be sectioned for evaluationat the end of the test.TABLE 1 Physical and Chemical Requirements of the Recycled Predilu
42、ted ProductPropertyEthylene Glycol BaseSpecific ValuesPropylene Glycol BaseSpecific ValuesASTM Test MethodRelative density, 15.5C (60/60F) 1.0650 min 1.0250 min D1122, D5931Freezing point, C (F) 36.4 (33.5) max or lower 31 (23.8) max or lower D1177, D6660Boiling point, C (F) 107.8 (226) min 104 (219
43、) min D1120Effect on automotive finish (use clear coat thermoset urethane or acrylicurethane finish)no effect no effect D1882AAsh content, mass % 2.5 max 2.5 max D1119pH, 50 volume % in distilled water 7.5 to 11.0 7.5 to 11.0 D1287Chloride, ppm 33 max 33 max D3634B, D5827Sulfate, ppm 140 max 140 max
44、 D5827Reserve alkalinity, mL reportCreportCD1121ACurrently, many vehicle manufacturers prepare test panels using the specific paint finishes employed on their actual product. Coolant suppliers and vehiclemanufacturers should agree on the exact test procedures and acceptance criteria on an individual
45、 basis.BIn case of dispute, D3634 shall be the preferred test method.CAgreed value between the supplier and the customer.TABLE 2 General Requirements of the Recycled PredilutedProductProperty Specified Values ASTM Test MethodColor distinctiveAEffect on nonmetals no adverse affect ACommonly used colo
46、r: green to blue-green.TABLE 3 Performance Requirements of the Recycled PredilutedProductPropertySpecificValuesASTM TestMethodCorrosion in glassware; Weight loss, mg/specimen D1384ACopper 10 maxSolder 30 maxBrass 10 maxSteel 10 maxCast iron 10 maxCast aluminum 30 maxSimulated service test; Weight lo
47、ss, mg/specimen D2570BCopper 20 maxSolder 60 maxBrass 20 maxSteel 20 maxCast iron 20 maxCast aluminum 60 maxCorrosion of cast aluminum alloys at heat-rejecting D4340CSurfaces; Weight loss, mg/cm2/week 1.0 maxFoaming D1881Volume, mL 150 maxBreak time, s 5 maxCavitation-erosion rating for pitting, cav
48、itation, or D2809DErosion of the water pump 8 minAluminum galvanostatic pitting potential, V v SHE 0.40 min D6208EFleet test see 6.8 and appropriatesubsectionsAThe recycled product shall be mixed with the proper quantity of ASTM Type IVreagent water (Specification D1193) to result in a 33-13 volume
49、% coolant testsolution. To each liter of test solution add 99 mg of sodium sulfate, 110 mg ofsodium chloride and 92 mg sodium bicarbonate.BThe recycled product shall be mixed with the proper quantity of ASTM Type IVreagent water (Specification D1193) to result in a 44 volume % coolant testsolution. To each liter of test solution add 83 mg of sodium sulfate, 92 mg of sodiumchloride and 77 mg of sodium bicarbonate.CThe adjusted recycled product shall be mixed with an equal volume of ASTMType IV reagent water (Specification D1193). To each liter of test so
