Designation:D1881−97(Reapproved2009)StandardTestMethodforFoamingTendenciesofEngineCoolantsinGlassware1ThisstandardisissuedunderthefixeddesignationD1881;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversasimpleglasswaretestforevaluatingthetendencyofenginecoolantstofoamunderlaboratory-controlled-conditionsofaerationandtemperature.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeand.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareapproximateequivalentsprovidedforinformationpurposesonly.2.ReferencedDocuments2.1ASTMStandards:2D1176PracticeforSamplingandPreparingAqueousSolu-tionsofEngineCoolantsorAntirustsforTestingPurposesD1193SpecificationforReagentWaterD3585SpecificationforASTMReferenceFluidforCoolantTestsE1SpecificationforASTMLiquid-in-GlassThermometersE128TestMethodforMaximumPoreDiameterandPerme-abilityofRigidPorousFiltersforLaboratoryUse3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1breaktime,n—thetimerequiredforthefoamtocollapse(aftertheairsupplyhasbeenshutoff)tothefirstappearanceofan“eye”onthesurfaceofthetestsolution.3.1.2eye,n—theappearanceoffoamfreeareaonthesurfaceofthetestcoolantsurroundedbyaringoffoamclingingtothecylinderwalls.4.SummaryofTestMethod4.1AsolutionofcoolantandASTMTypeIIwaterisblownwithairataconstantratefor5min,whilemaintainedataconstanttemperatureof8861°C(19062°F)bymeansofasuitabletemperaturebath.Thevolumeoffoam,andthetimeforsuchfoamtobreak,aremeasured.5.Significanc...
