1、Designation: D5752 10Standard Specification forSupplemental Coolant Additives (SCAs) for Use inPrecharging Coolants for Heavy-Duty Engines1, 2This standard is issued under the fixed designation D5752; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、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 general, physical, chemi-cal, and performance requirement
3、s for Supplemental CoolantAdditives (SCAs) at a precharged level in the cooling systemsof heavy-duty engines.NOTE 1After precharging, SCAs are customarily used periodically toservice cooling systems at14 to13 the precharged dosage to compensatefor additives lost through dilution and depletion.1.2 Th
4、e SCA products meeting this specification are in-tended for use with water, with recommended dilutions ofcoolant concentrates, with prediluted engine coolants, or toupgrade the performance of light-duty engine coolants to meetthe heav-duty requirements of Specification D6210. Enginecoolant products
5、shall be of the low-silicate type and, ifethylene glycol based, shall meet Specification D4985. Propy-lene glycol base low-silicate type coolant products may also beused, if these materials meet the chemical and performancerequirements of Specification D4985.1.3 The SCA concentrate, before dissoluti
6、on, may be ineither liquid, solid, or slurry form. The form is as agreed uponbetween the manufacturer and the user.1.4 The values stated in SI units are to be regarded asstandard. The inch-pound units in parentheses are approximateequivalents provided for information only.1.5 This standard does not
7、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.2. Referenced Documents2.1 ASTM Standards:
8、3D512 Test Methods for Chloride Ion In WaterD516 Test Method for Sulfate Ion in WaterD1119 Test Method for Percent Ash Content of EngineCoolantsD1121 Test Method for Reserve Alkalinity of Engine Cool-ants and AntirustsD1126 Test Method for Hardness in WaterD1193 Specification for Reagent WaterD1287
9、Test Method for pH of Engine Coolants and Anti-rustsD1293 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 of Cooling System ChemicalSolutions on Organic
10、 Finishes for Automotive VehiclesD2570 Test Method for Simulated Service Corrosion Test-ing of Engine CoolantsD2809 Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With En-gine CoolantsD3634 Test Method for Trace Chloride Ion in EngineCoolantsD4327 Test M
11、ethod for Anions in Water by ChemicallySuppressed Ion ChromatographyD4340 Test Method for Corrosion of CastAluminumAlloysin Engine Coolants Under Heat-Rejecting ConditionsD4985 Specification for Low Silicate Ethylene Glycol BaseEngine Coolant for Heavy Duty Engines Requiring aPre-Charge of Supplemen
12、tal Coolant Additive (SCA)D5827 Test Method for Analysis of Engine Coolant forChloride and Other Anions by Ion ChromatographyD5828 Test Method for Compatibility of SupplementalCoolant Additives (SCAs) and Engine Coolant Concen-tratesD6129 Test Method for Silicon in Engine Coolant Concen-trates by At
13、omic Absorption SpectroscopyD6130 Test Method for Determination of Silicon and OtherElements in Engine Coolant by Inductively CoupledPlasma-Atomic Emission SpectroscopyD6210 Specification for Fully-Formulated Glycol Base En-gine Coolant for Heavy-Duty Engines1This specification is under the jurisdic
14、tion ofASTM Committee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.07 on Specifications.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1995. Last previous edition approved in 2005 as D5752 - 05. DOI:10.1520/D5752-10.2A research report
15、is available from ASTM headquarters. Request: D15-1024.3For 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.1*A Su
16、mmary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D6471 Specification for Recycled Prediluted Aqueous Gly-col Base Engine Coolant (50 Volume % Minimum) forAutomobile and Light
17、-Duty ServiceD6472 Specification for Recycled Glycol Base EngineCoolant Concentrate for Automobile and Light-Duty Ser-viceE1177 Specification for Engine Coolant Grade GlycolG32 Test Method for Cavitation Erosion Using VibratoryApparatus2.2 Other Documents:Federal Method 2540B Total Dissolved Solids
18、Dried at103105C43. General Requirements3.1 The SCA concentrate upon addition to water or water/glycol mixtures at the SCA manufacturers recommendedaddition level shall provide the same performance as coolantsmeeting Specification D6210, except for freeze and boilprotection3.2 Liquid SCA concentrates
19、 shall be storable in the manu-facturers original container at temperatures from 7 to + 55C(20 to 130F) without chemical change. Any precipitation ofingredients evidenced by the dropout of solid material or liquidturbidity shall disappear upon agitation and warming of thesolution to a temperature ex
20、ceeding 2C (35F).3.3 Solid, slurry, and paste forms of SCA concentrate shallbe so formulated and packaged as to prevent chemical orphysical change during storage before use. This requirementapplies to storage temperatures of 7 to + 55C (20 to 130F),regardless of humidity.3.4 The SCA concentrates, wh
21、en used according to themanufacturers recommendations, shall dissolve totally in thetest solutions required in this specification. A light haze ispermitted.3.5 If an engine, vehicle, or servicing organization recom-mends adding a precharge dosage of an SCA product to a fullyformulated coolant govern
22、ed by Specification D6210, thatorganization assumes responsibility for determining the com-patibility and conducting suitable tests.ASTM has developed acompatibility test (Test Method D5828), which may be used.At the present time, it is recommended that precharge doses ofSCAs be used only in conjunc
23、tion with coolant productsmeeting Specification D4985.4. Preparation of Test Solutions4.1 The preparation of test solutions for this specification islisted in Table 1. The glycol used, either ethylene glycol orpropylene glycol, shall meet Specification E1177. Wheredistilled water is required, it sha
24、ll conform to Type IV ofSpecification D1193.4.2 The quantity of any freshly prepared test solutionrequired in this specification shall be sufficient to perform thespecific tests. However, no test solution shall be stored longerthan 96 h before initiation of a specific procedure.5. Detailed Requireme
25、nts5.1 Test solutions prepared according to Table 1 shall meetthe performance requirements in Table 2, the general require-ments in Table 3, and the physical and chemical requirementsin Table 4.5.2 The SCAs shall additionally provide added protection inoperating engines against cavitation corrosion
26、(also termed4Standard Method for the Examinaiton of Water and Wastewater. AmericanPublic Health Association, et al, 1015 15th Street, N.W. Washington, DC 20005.TABLE 1 Composition of Test Solutions for Table 2 PerformanceRequirementsATest Method SCA Concentrate Solvent MixtureD1384 one-half manufact
27、urersrecommended prechargedlevelstandard corrosive waterBD1384 three times manufacturersrecommended prechargedlevel33 vol % glycol in standardcorrosive waterB,CD1881 manufacturers recommendedprecharge level33 vol % glycol in standardcorrosive waterB,CD2570 manufacturers recommendedprecharge level44
28、vol % glycol in standardcorrosive waterB,CD2809 manufacturers recommendedprecharge level16.7 vol % glycol in standardcorrosive waterB,CD4340 manufacturers recommendedprecharge level165-mg/L NaCl dissolved in a1-L solution of 25 vol %glycol in deionized waterC,DATest solution to be prepared according
29、 to Section 4.BSee Section 7 of Test Method D2570 for composition and method of prepara-tion of standard corrosive water.CThe glycol used shall be ethylene glycol or propylene glycol and each shallmeet Specification E1177.DWater conforming to Type IV of Specification D1193 is acceptable.TABLE 2 Perf
30、ormance RequirementsAProperty Specific Values Test MethodCorrosion in glassware mass loss,mg/specimenD1384Copper 10 maxSolder 30 maxBrass 10 maxSteel 10 maxCast iron 10 maxAluminum 30 maxSimulated service test mass loss,mg/specimenD2570Copper 20 maxSolder 60 maxBrass 20 maxSteel 20 maxCast iron 20 m
31、axAluminum 60 maxFoaming D1881Volume, mL 150 maxBreak time, s 5 maxWater pump cavitation erosion-corrosion rating8min D2809Corrosion of cast aluminum alloys atheat-rejecting surfaces, mg/cm2/week1.0 max D4340Ultrasonic cavitation resistance see Annex A1 under developmentSCA-glycol base coolant compa
32、tibilityBD5828Hot surface scaling and depositsresistanceC. under developmentATest solutions for use in meeting Table 2 performance requirements are to beprepared according to Table 1.BSCA products may be required to meet a compatibility requirement. AlthoughTest Method D5828 has been developed, ASTM
33、 has not established allowablelimits. Until allowable limits have been approved, an agreement must be estab-lished between the SCA manufacturer and engine or vehicle user. This agreementshall include a definition of the test procedure, acceptable equipment, and theperformance rating criteria.CSee Ap
34、pendix X2 for additional information.D5752 102liner pitting) and against scaling of internal engine hot sur-faces. Hot surfaces are typically within the engine head, headspacer, or liquid-cooled exhaust manifold, oil coolers, aftercoolers, and exhaust gas recirculation (EGR) coolers. TheAmerican Soc
35、iety for Testing and Materials has test methodsunder development for both cavitation corrosion and hotsurfaces scaling. Until these procedures are adopted as ASTMstandards, the mandatory requirements of Annex A1 shallapply.6. Keywords6.1 heavy-duty engine coolants; precharging heavy-dutyengines; SCA
36、; supplemental coolant additivesTABLE 3 General RequirementsProperty Specific Value Test MethodEffect on nonmetalsAno adverse effect under considerationStorage stability see 3.2 and 3.3 .AEvaluate using the SCA concentrate at the manufacturers recommendedprecharge level in a 50:50 volume mixture of
37、distilled water and ethylene glycol ordistilled water and propylene glycol, each glycol conforming to SpecificationE1177.TABLE 4 Physical and Chemical PropertiesPropertyASpecific Values Test MethodAsh content, dissolved in distilledwater, mass, %5 max D1119pH, in distilled water 7.5 to 11.0 D1287Res
38、erve alkalinity, in distilled water reportBD1121Chloride ion, in distilled water, ppm 25 max D3634, D5827CSilicon, in distilled water, ppm 250 max D6129, D6130Effect on vehicle finish no effectDD1882AProperty must be met with the specified solution, at an SCA precharge additionlevel recommended by t
39、he SCA manufacturer. (This is usually 3 % by volume.)BValue agreed upon between the supplier and the customer.CIn case of dispute, D3634 shall be the preferred test method.DCurrently, many heavy-duty engine manufacturers and vehicle manufacturersthat use these engines prepare test panels using the s
40、pecific paint finishes usedon their actual products. Coolant product manufacturers and equipment buildersshould agree on the exact test procedures and acceptance criteria on an individualcase basis.D5752 103ANNEX(Mandatory Information)A1. CHEMICAL REQUIREMENTS FOR SCAsA1.1 Test methods to determine
41、cavitation corrosion resis-tance are under development. Several chemical compositionsof SCAs have been extensively tested by producers and usersand found to minimize satisfactorily cylinder liner cavitation inactual test engines. Until such time as an ASTM procedure isadopted that effectively evalua
42、tes cylinder liner cavitationcorrosion, SCA formulations under this specification shallprovide the following when used at the SCA manufacturersrecommended precharge addition level:A1.1.1 Aminimum concentration of nitrite as (NO2)inthecooling system of 1200 ppm, orA1.1.2 A minimum combined concentrat
43、ion of nitrite as(NO2) plus molybdate as (MoO42) in the cooling system of780 ppm.At least 300 ppm each of NO2and MoO42must bepresent.A1.1.3 Concentrations below the minimums detailed inA1.1.1 and A1.1.2 may not provide sufficient protection. (SeeX1.1.3.2 for further information.)A1.2 Composition lim
44、its in A1.1 are waived provided:A1.2.1 The SCAproducer and engine manufacturer agree tospecified composition limits for one or more chemical ingre-dients other than those stated in A1.1.A1.2.2 Both parties agree to accept laboratory data orin-service performance experience demonstrating that the al-
45、ternate composition exerts a positive influence on reducingcavitation corrosion in an operating engine.A1.2.3 In-service qualification tests may consist of single-or multiple-cylinder engine tests.At the option of the engine orvehicle manufacturer, such testing may be conducted in “looseengines” or
46、in engines fully integrated into an application suchas a vehicle, a power boat, or a stationary power source. Onesuch test has been developed.5A1.3 Chemical composition requirements for cavitationcorrosion protection will be removed from this specificationand replaced with anASTM test method when a
47、test method isdeveloped and adopted.A1.4 No specific chemical composition requirements forhot surface scaling and deposit resistance have been estab-lished at this time. A test procedure for this property is underdevelopment and will be incorporated into Table 2 when aprocedure is approved by ASTM.A
48、1.5 Lack of compatibility between the coolant and SCAproducts chemistry results in chemical ingredient dropoutfrom solution, with potential adverse effects in the vehicle orengine cooling system. A test procedure for compatibility hasbeen developed, Test Method D5828, and may be used toestablish com
49、patibility between the coolant and the SCAproduct.APPENDIXES(Nonmandatory Information)X1. COOLANT MAINTENANCE FOR HEAVY-DUTY ENGINESX1.1 Engine CoolantCooling system fill for a heavy-duty engine consists of water, coolant concentrate (antifreeze),or prediulted engine coolant, and SCA.X1.1.1 Water:X1.1.1.1 Water quality affects the efficiency of coolantadditives. When untreated, all water is corrosive. Water havinga high mineral content or corrosive materials is unfit forcooling system use.X1.1.1.2 When preparing coolant mixtures, the watershould be of
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