Designation:E2046−14StandardTestMethodforReactionInductionTimebyThermalAnalysis1ThisstandardisissuedunderthefixeddesignationE2046;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethoddescribesthemeasurementofReactionInductionTime(RIT)ofchemicalmaterialsthatundergoexothermicreactionswithaninductionperiod.Thetechniquesandapparatusdescribedmaybeusedforsolids,liquids,orslurriesofchemicalsubstances.Thetemperaturerangecoveredbythistestmethodistypicallyfromambientto400°C.Thisrangemaybeextendeddependingupontheapparatusused.1.2TheRITisarelativeindexvalue,notanabsolutethermodynamicproperty.Asanindexvalue,theRITvaluemaychangedependinguponexperimentalconditions.Acompari-sonofRITvaluesmaybemadeonlyformaterialstestedundersimilarconditionsofapparatus,specimensize,andsoforth.Furthermore,theRITvaluemaynotpredictbehavioroflargequantitiesofmaterial.1.3TheRITshallnotbeusedbyitselftoestablishasafeoperatingtemperature.Itmaybeusedinconjunctionwithothertestmethods(forexample,E487,E537,andE1981)aspartofahazardanalysisofaparticularoperation.1.4ThistestmethodmaybeusedforRITvaluesgreaterthan15min(asrelativeimprecisionincreasesatshorterperiods).1.5Thistestmethodisusedtostudycatalytic,autocatalytic,andacceleratingreactions.Thesereactionsdependupontimeaswellastemperature.Suchreactionsareoftenstudiedbyfixingoneexperimentalparameter(thatis,timeortempera-ture)andthenmeasuringtheotherparameter(thatis,tempera-tureortime).Thistestmethodmeasurestimetoreactiononsetdetectionunderisothermalconditions.ItisrelatedtoTestMethodE487thatmeasuresdetectedreactiononsettempera-tureunderconstanttimeconditions1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7ThereisnoISOstandardequivalenttothistestmethod.1.8Thisstandarddoesnotpurport...
