1、Designation: D 6471 06Standard Specification forRecycled Prediluted Aqueous Glycol Base Engine Coolant(50 Volume % Minimum) for Automobile and Light-DutyService1This standard is issued under the fixed designation D 6471; the number immediately following the designation indicates the year oforiginal
2、adoption 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 recycledprediluted
3、 aqueous 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 recycl
4、ing 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 provid
5、es 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 proc
6、edure. 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 rega
7、rded 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 s
8、afety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 512 Test Methods for Chloride Ion In WaterD 516 Test Method for Sulfate Ion in WaterD 1119 Test Method for Percent Ash Content of EngineCoolantsD 1120 Test
9、Method for Boiling Point of Engine CoolantsD 1121 Test Method for Reserve Alkalinity of EngineCoolants and AntirustsD 1122 Test Method for Density or Relative Density ofEngine Coolant Concentrates and Engine Coolants By TheHydrometerD 1126 Test Method for Hardness in WaterD 1176 Practice for Samplin
10、g and Preparing Aqueous So-lutions of Engine Coolants or Antirusts for Testing Pur-posesD 1177 Test Method for Freezing Point of Aqueous EngineCoolantsD 1193 Specification for Reagent WaterD 1287 Test Method for pH of Engine Coolants and Anti-rustsD 1293 Test Methods for pH of WaterD 1384 Test Metho
11、d for Corrosion Test for Engine Coolantsin GlasswareD 1881 Test Method for Foaming Tendencies of EngineCoolants in GlasswareD 1882 Test Method for Effect of Cooling System ChemicalSolutions on Organic Finishes for Automotive VehiclesD 1888 Methods of Test for Particulate and DissolvedMatter in Water
12、31This specification is under the jurisdiction ofASTM Committee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.15 on RecycledEngine Coolant.Current edition approved June 1, 2006. Published June 2006. Originallyapproved in 1999. Last previous edition approved in 2005 as D
13、647105.2For 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.3Withdrawn.1Copyright ASTM International, 100 Barr Har
14、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D 2570 Test Method for Simulated Service Corrosion Test-ing of Engine CoolantsD 2809 Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With En-gine CoolantsD 2847 Practice for Testing E
15、ngine Coolants in Car andLight Truck ServiceD 3306 Specification for Glycol Base Engine Coolant forAutomobile and Light-Duty ServiceD 3634 Test Method for Trace Chloride Ion in EngineCoolantsD 4327 Test Method for Anions in Water by ChemicallySuppressed Ion ChromatographyD 4340 Test Method for Corro
16、sion of Cast AluminumAlloys in Engine Coolants Under Heat-Rejecting Condi-tionsD 4656 Specification for Prediluted Aqueous Ethylene Gly-col Base Engine Coolant (50 Volume % Minimum) forAutomobiles and Light-Duty Service (Discontinued2001)3D 5216 Specification for Propylene Glycol Base EngineCoolant
17、for Automotive and Light-Duty Service3D 5827 Test Method for Analysis of Engine Coolant forChloride and Other Anions by Ion ChromatographyD 5931 Test Method for Density and Relative Density ofEngine Coolant Concentrates and Aqueous Engine Cool-ants by Digital Density MeterD 6129 Test Method for Sili
18、con in Engine Coolant Concen-trates by Atomic Absorption SpectroscopyD 6130 Test Method for Determination of Silicon and OtherElements in Engine Coolant by Inductively CoupledPlasma-Atomic Emission SpectroscopyD 6208 Test Method for Repassivation Potential of Alumi-num and Its Alloys by Galvanostati
19、c MeasurementD 6257 Specification for Prediluted Aqueous PropyleneGlycol Base Base Engine Coolant (50 Volume % Mini-mum) for Automobile and Light-Duty Service3D 6472 Specification for Recycled Glycol Base EngineCoolant Concentrate for Automobile and Light-Duty Ser-viceD 6660 Test Method for Freezing
20、 Point of Aqueous Ethyl-ene Glycol Base Engine Coolants by Automatic PhaseTransition Method2.2 Other Documents:SAE HS40 Maintenance of Automotive Engine CoolingSystems4GM 6043MAutomotive Engine Coolant ConcentrateEthylene Glycol Type5GM 1825MAutomotive Engine Coolant ConcentrateEthylene Glycol; 3.11
21、 Storage Stability and Compatibil-ity63. Reagents and Materials3.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents conform to the specifications of the Committee onAnalytical Reagents of the American Chemical Society wh
22、eresuch specifications are available.7Other grades may be used,provided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.3.2 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to
23、 mean reagent water as definedby Type IV of Specification D 1193.4. Procedure4.1 In order to properly evaluate a coolant recycling 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
24、. An appropri-ately sized batch of reference synthetic used coolant is to beprepared and used to purge the recycling process componentsand yield enough consistent product to complete the testingspecified within this specification.4.2 Prepare the coolant recycling equipment or technologyaccording to
25、the manufacturers directions and recommenda-tions.4.3 Vigorously stir or mix the reference synthetic usedcoolant using appropriate vessels and mixing equipment im-mediately prior to and during the processing through thecoolant recycling process.4.4 Recycle the reference synthetic used coolant accord
26、ingto the manufacturers directions and recommendations.4.5 Evaluate the recycled coolant per the requirements listedin this specification.5. General Requirements5.1 The recycled prediluted aqueous glycol base enginecoolant shall consist essentially of water and ethylene glycol orpropylene glycol obt
27、ained from the processing of light, me-dium or heavy duty engine coolant products. The recycledprediluted aqueous glycol base engine coolant can in partcontain virgin glycol. . It also shall contain suitable corrosioninhibitors and a foam suppressor.5.1.1 Recycled prediluted aqueous ethylene glycol
28、baseengine coolant may contain glycols other than ethylene glycolup to 7.5 % provided the chemical and physical properties ofTable 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 phys
29、ical properties ofTable 1 are met.5.2 The recycled prediluted aqueous glycol base enginecoolant shall conform to the chemical and physical properties4SAE Handbook, available from Society of Automotive Engineers, 400 Com-monwealth Drive, Warrendale, PA 15096.5Applicable rewrite available in Annex A2.
30、6Applicable rewrite available in Annex A3.7Reagent 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 for LaboratoryChemicals, BDH Ltd., Poole, Dors
31、et, U.K., and the United States Pharmacopeia andNational Formulary, U.S. Pharmacopeial Convention, Inc., (USPC), Rockville, MD.D6471062in Table 1. If the recycled prediluted aqueous glycol baseengine coolant contains chloride or sulfate, or both, at levelsgreater than the requirements specified in T
32、able 1, fleet testingrequirements described in Section 6 shall be met. If thechloride and sulfate requirements in Table 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 engin
33、ecoolant are neutralized through real world application in a fleet test. Dueto the fact that there are not enough industry field test data available tosupport setting hard specification limits, the fleet test requirements inSection 6 specify a protocol and limits based on comparing the recycledglyco
34、l base engine coolant to an industry standard reference enginecoolant that is known to adequately protect modern day 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 gl
35、ycol base enginecoolant shall be in accordance with the performance require-ments in Table 3.5.5 This product, when installed in accordance with therecommendations of the manufacturer of the vehicle, or thecoolant recycling process, and those on the product label, shallbe suitable for use in a prope
36、rly maintained cooling system (seeAppendix X1) in normal light-duty or passenger car service 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 engin
37、e coolant shallbe used to conduct the fleet testing.6.2 VehiclesA minimum of fourteen vehicles 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 v
38、ehicles and five test vehicles shall finish thetest. Starting with fourteen vehicles allows 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. Vehicl
39、es with corroded coolingTABLE 1 Physical and Chemical Requirements of the Recycled Prediluted ProductPropertyEthylene Glycol BaseSpecific ValuesPropylene Glycol BaseSpecific ValuesASTM Test MethodRelative density, 15.5C (60/60F) 1.0650 min 1.0250 min D 1122, D 5931Freezing point, C (F) 37 (34) max o
40、r lower 32 (26) max or lower D 1177, D 6660Boiling point, C (F) 107.8 (226) min 104 (219) min D 1120Effect on automotive finish (use clear coat thermoset urethane or acrylicurethane finish)no effect no effect D 1882AAsh content, mass % 2.5 max 2.5 max D 1119pH, 50 volume % in distilled water 7.5 to
41、11.0 7.5 to 11.0 D 1287Chloride, ppm 33 max 33 max D 3634B, D 5827Sulfate, ppm 140 max 140 max D 5827Reserve alkalinity, mL reportCreportCD 1121ACurrently, many vehicle manufacturers prepare test panels using the specific paint finishes employed on their actual product. Coolant suppliers and vehicle
42、manufacturers should agree on the exact test procedures and acceptance criteria on an individual basis.BIn case of dispute, D 3634 shall be the preferred test method.CAgreed value between the supplier and the customer.TABLE 2 General Requirements of the Recycled PredilutedProductProperty Specified V
43、alues ASTM Test MethodColor distinctiveAEffect on nonmetals no adverse affect ACommonly used color: green to blue-green.TABLE 3 Performance Requirements of the Recycled PredilutedProductPropertySpecificValuesASTM TestMethodCorrosion in glassware; Weight loss, mg/specimen D 1384ACopper 10 maxSolder 3
44、0 maxBrass 10 maxSteel 10 maxCast iron 10 maxCast aluminum 30 maxSimulated service test; Weight loss, mg/specimen D 2570BCopper 20 maxSolder 60 maxBrass 20 maxSteel 20 maxCast iron 20 maxCast aluminum 60 maxCorrosion of cast aluminum alloys at heat-rejecting D 4340CSurfaces; Weight loss, mg/cm2/week
45、 1.0 maxFoaming D 1881Volume, mL 150 maxBreak time, s 5 maxCavitation-erosion rating for pitting, cavitation, or D 2809DErosion of the water pump 8 minAluminum galvanostatic pitting potential, V v SHE 0.40 min D 6208EFleet test see 6.8 and appropriatesubsectionsAThe recycled product shall be mixed w
46、ith the proper quantity of ASTM Type IVreagent water (Specification D 1193) to result in a 33-13 volume % 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 quant
47、ity of ASTM Type IVreagent water (Specification D 1193) 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
48、IV reagent water (Specification D 1193). To each liter of test solution add 165mg of sodium chloride.DOne volume of the recycled product shall be mixed with two volumes of ASTMType IV reagent water (Specification D 1193). To each liter of test solution add 123mg of sodium sulfate, 137 mg of sodium c
49、hloride and 115 mg of sodiumbicarbonate.EThe test solution is to be prepared as follows: 50 volume % of the predilutedcoolant to be tested, 25 volume % of the corrosive water specified in Test MethodD 6208, and the remainder deionized or distilled water.D6471063systems should not be used for testing purposes. Vehicleselection 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.
