1、Designation: D6472 10Standard Specification forRecycled Glycol Base Engine Coolant Concentrate forAutomobile and Light-Duty Service1This standard is issued under the fixed designation D6472; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, 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 recycledethylene glycol base engine coolant concen
3、trate and recycledpropylene glycol base engine coolant concentrate for use inautomobiles and light-duty vehicles. Committee D15 hasdeveloped this specification using experience, knowledge andresearch from recycling used aqueous base engine coolant andblends of used aqueous base engine coolant and vi
4、rgin 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 a procedure for evaluating engine cool-ant recycling technologies through the recyclin
5、g of a referencesynthetic used engine coolant. It also specifies the chemical,physical, and performance requirements for the recycled glycolbase engine coolant concentrate that is produced from thatprocedure. When used at 40 to 70 volume % in water, it willfunction effectively during both winter and
6、 summer. Thismaterial 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 regarded as thestandard. The values given in parentheses are approximateequivalents and provided for in
7、formation 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 prior to use.
8、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 of Engine Cool-ants
9、 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 WaterD1176 Practice for Sampling and Prepa
10、ring 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 Corrosion T
11、est 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 Tes
12、t 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 forAutomobile and Light-Duty ServiceD3634 Test Method for Trace Ch
13、loride Ion in EngineCoolantsD4327 Test Method for Anions in Water by ChemicallySuppressed Ion ChromatographyD4340 Test Method for Corrosion of CastAluminumAlloysin Engine Coolants Under Heat-Rejecting Conditions1This specification is under the jurisdiction ofASTM Committee D15 on EngineCoolants and
14、is the direct responsibility of Subcommittee D15.15 on RecycledEngine Coolant.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 2000. Last previous edition approved in 2006 as D647206. DOI:10.1520/D6472-10.2For referenced ASTM standards, visit the ASTM website, www.as
15、tm.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 International, 100 Barr Harbor Drive, PO
16、Box C700, West Conshohocken, PA 19428-2959, United States.D5827 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 Tes
17、t 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 Alloys
18、by Galvanostatic MeasurementD6660 Test Method for Freezing Point ofAqueous EthyleneGlycol Base Engine Coolants by Automatic Phase Transi-tion MethodD6471 Specification for Recycled Prediluted Aqueous Gly-col Base Engine Coolant (50 Volume % Minimum) forAutomobile and Light-Duty Service2.2 Other Docu
19、ments:Federal Method 2540B Total Dissolved Solids Dried at103105C3GM 6043M Automotive Engine Coolant ConcentrateEthylene Glycol Type4GM 1825M Automotive Engine Coolant ConcentrateEthylene Glycol; 3.11 Storage Stability and Compatibil-ity53. Reagents and Materials3.1 Purity of ReagentsReagent grade c
20、hemicals 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 wheresuch specifications are available6. Other grades may be used,provided it is first ascertained tha
21、t 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 mean reagent water as definedby Type IV of Specification D1193.4. Procedure4.1 In order to properl
22、y 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. An appropri-ately sized batch of reference synthetic used coolant is to beprepared and used to pur
23、ge the recycling process componentsand yield enough consistent product to complete the testingspecified within this specification4.2 Prepare the coolant recycling equipment or technologyin accordance with the manufacturers directions and recom-mendations.4.3 Vigorously stir or mix the reference synt
24、hetic 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 accordingto the manufacturers directions and recommendations.4.5 Evaluate the recycled coolant accord
25、ing to the require-ments listed in this specification.5. General Requirements5.1 The recycled glycol base engine coolant concentrateshall consist essentially of ethylene glycol or propylene glycolobtained from the processing of light-, medium- or heavy-dutyengine coolant products. The recycled glyco
26、l base enginecoolant concentrate can in part contain virgin glycol. It alsoshall contain suitable corrosion inhibitors, a foam suppressor,and sufficient water to dissolve the additives.5.1.1 Recycled ethylene glycol base engine coolant concen-trates may be packaged and should be able to be poured at
27、temperatures as low as 18C (0F). Other glycols such aspropylene and diethylene glycol may be included up to amaximum of 15 % if the chemical and physical properties inTable 1 are met.5.1.2 Recycled propylene glycol base engine coolant con-centrates may contain glycols other than propylene glycol up
28、to1 % provided the chemical and physical properties of Table 1are met5.2 The recycled glycol base engine coolant concentrateshall conform to the chemical and physical properties in Table1. If the recycled glycol base engine coolant concentrate3Standard Method for the Examination of Water and Wastewa
29、ter. AmericanPublic Health Association, et al, 1015 15th Street, N.W. Washington, DC 20005.4Applicable rewrite available in Annex A2.5Applicable rewrite available in Annex A3.6Reagent Chemicals, American Chemical Society Specifications , AmericanChemical Society, Washington, DC. For suggestions on t
30、he testing of reagents notlisted by the American Chemical Society, see Analar Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.TABLE 1 Physical and Chemical Requirement
31、sPropertyEthylene GlycolBase SpecificValuesPropyleneGlycol BaseSpecific ValuesASTM TestMethodRelative density, 15.5C(60/60F)1.110 to 1.145 1.030 to 1.065 D1122, D5931Freezing point, 50 volume% in distilled water, C ( )36.4 (33.5) maxor lower31 (23.8)max or lowerD1177, D6660Boiling pointA, undiluted,
32、 C(F) 50 volume % indistilled water163 (325) min 152 (305) min D1120107.8 (226) min 104 (219) min D1120Effect on automotive finish(use clear coat thermoseturethane or acrylicurethane finish)no effect no effect D1882BAsh content, mass % 5 max 5 max D1119pH, 50 volume % in distilledwater7.5 to 11.0 7.
33、5 to 11.0 D1287Chloride, ppm 25 max 25 max D3634C, D5827Sulfate, ppm 100 max 100 max D5827Water, mass % 5 max 5 max D1123Reserve alkalinity, mL ReportDReportDD1121ASome precipitate may be observed at the end of the test. This should not because for rejection.BCurrently, many vehicle manufacturers pr
34、epare test panels using the specificpaint finishes employed on their actual product. Coolant suppliers and vehiclemanufacturers should agree on the exact test procedures and acceptance criteriaon an individual basis.CIn case of dispute, Test Method D3634 shall be the preferred method.DAgreed value b
35、etween the supplier and the customer.D6472 102contains chloride, or sulfate levels greater than the require-ments specified in Table 1, fleet testing requirements describedin Section 6 shall be met. If the chloride, or sulfate require-ments, or both, in Table 1 are met, fleet testing is not required
36、.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 industry field test data available tosupport
37、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 day cooling systemsfrom corrosion.5.3 The recy
38、cled glycol base engine coolant concentrateshall conform to the general requirements in Table 2.5.4 The recycled glycol base engine coolant concentrateshall be in accordance with the performance requirements inTable 3.5.5 When preparing solutions for actual service, use mu-nicipal (treated) water, o
39、r low mineral content well water. Ifsuch water is not available, then use deionized (demineralized)or distilled water. This practice will minimize the formation ofhard water scale and avoid the introduction of aggressivecontaminants, such as chlorides and sulfates, that can increasethe corrosion rat
40、e of aluminum and iron (see Appendix X1 foradditional information).5.6 The 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 properly maintained cooling syste
41、m (seeAppendix X1) in normal passenger car service for a minimumof one year without adversely affecting fluid flow and heattransfer.6. Fleet Testing Requirements6.1 Engine CoolantsReference engine coolant concen-trate (see Annex A2) and recycled engine coolant concentrateshall be used to conduct the
42、 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 engine coolant concentrate (test vehicles). A mini-mum of five control vehicles and five test vehicles sha
43、ll finishthe test. Starting with fourteen vehicles allows for vehicles todrop out of the test for various reasons, that is, mechanicalfailure, coolant contamination, etc.6.2.1 Vehicle SelectionAll vehicle cooling systems shouldbe inspected prior to selection. Vehicles with corroded coolingsystems sh
44、ould 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 conditions.6.2.1.4 Same
45、cooling system and power train configuration.6.2.1.5 Aluminum 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.Aminimum of five control
46、vehicles andfive test vehicles, equipped with aluminum 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
47、set up with a new aluminumhead(s), aluminum radiator, 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.6.2.2.2 Eac
48、h vehicle shall be set up with six coupon bundlesin the bypass heater circuit coupon bundle capsule(s). Once thetest has been started, no additional or replacement corrosioncoupon bundles can be added to any of the vehicle coolingsystems. The coupon bundle capsule(s) should be arranged inthe cooling
49、 system to minimize the amount of coolant spillagewhen bundles are removed throughout the testing period. Morethan one coupon bundle capsule may be used in the bypassheater circuit in series if the vehicle design does not accom-modate the incorporation of a single capsule.NOTE 3Additional coupon bundles may be added to the coolingTABLE 2 General RequirementsProperty Specified Values ASTM Test MethodColor Distinctive Effect on nonmetals No adverse affect TABLE 3 Performance RequirementsProperty Specific ValuesASTM TestMethodCorrosion in glassware; weight
