Designation:D1881−17StandardTestMethodforFoamingTendenciesofEngineCoolantsinGlassware1ThisstandardisissuedunderthefixeddesignationD1881;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversasimpleglasswaretestforevaluatingthetendencyofenginecoolantstofoamunderlaboratory-controlled-conditionsofaerationandtemperature.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareapproximateequivalentsprovidedforinformationpurposesonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSection7,MaterialsandReagents.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1176PracticeforSamplingandPreparingAqueousSolu-tionsofEngineCoolantsorAntirustsforTestingPurposesD1193SpecificationforReagentWaterD3585SpecificationforASTMReferenceFluidforCoolantTestsE1SpecificationforASTMLiquid-in-GlassThermometersE128TestMethodforMaximumPoreDiameterandPerme-abilityofRigidPorousFiltersforLaboratoryUseE230/E230MSpecificationforTemperature-ElectromotiveForce(emf)TablesforStandardizedThermocouples3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1breaktime,n—thetimerequiredforthefoamtocollapse(aftertheairsupplyhasbeenshutoff)tothefirstappearanceofan“eye...
