Designation:D4049−16StandardTestMethodforDeterminingtheResistanceofLubricatingGreasetoWaterSpray1ThisstandardisissuedunderthefixeddesignationD4049;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethod2coverstheabilityofagreasetoadheretoametalsurfacewhensubjectedtoawatersprayunderprescribedlaboratoryconditions.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.2.1Exception—Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3D217TestMethodsforConePenetrationofLubricatingGreaseD1742TestMethodforOilSeparationfromLubricatingGreaseDuringStorageE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Definitions:3.1.1lubricatinggrease,n—asemi-fluidtosolidproductofadispersionofathickenerinaliquidlubricant.3.1.1.1Discussion—Thedispersionofthethickenerformsatwo-phasesystemandimmobilizestheliquidlubricantbysurfacetensionandotherphysicalforces.Otheringredientsarecommonlyincludedtoimpartspecialproperties.D2173.1.2oilseparation,n—theappearanceofaliquidfractionfromanotherwisehomogeneouslubricatingcomposition.D17423.1.3thickener,n—inlubricatinggrease,asubstancecom-posedoffinelydividedparticlesdispersedinaliquidlubricanttoformtheproduct’sstructure.3.1.3.1Discussion—Thethickenerscanbefibers(suchasvariousmetallicsoaps)orplatesorspheres(suchascertainnon-soapthickeners),whichareinsolubleor,atmost,onlyveryslightlysolubleintheliquidlubricant.Thegeneralrequire-mentsarethatthesolidparticlesbeextremelysmall,uniformlydispersed,andcapableof...
