Designation:D1177−22StandardTestMethodforFreezingPointofAqueousEngineCoolants1ThisstandardisissuedunderthefixeddesignationD1177;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationofthefreez-ingpointofanaqueousenginecoolantsolutioninthelaboratory.NOTE1—Wheresolutionsofspecificconcentrationsaretobetested,theyshallbepreparedfromrepresentativesamplesasdirectedinPracticeD1176.Secondaryphasesseparatingondilutionneednotbeseparated.NOTE2—Theseproductsmayalsobemarketedinaready-to-useform(prediluted).1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1176PracticeforSamplingandPreparingAqueousSolu-tionsofEngineCoolantsorAntirustsforTestingPurposesE1SpecificationforASTMLiquid-in-GlassThermometers3.Terminology3.1Definitions:3.1.1freezingpoint—thetemperatureatwhichcrystalliza-tionbeginsintheabsenceofsupercooling,orthemaximumtemperaturereachedimmediatelyafterinitialcrystalformationinthecaseofsupercooling,orthetemperatureatwhichsolidcrystals,formedoncooling,disappearwhenthetemperatureofthe...
