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1、Designation:E595?15StardTestMethodfTotalMassLossCollectedVolatileCondensableMaterialsfromOutgassinginaVacuumEnvironment1ThisstardisissuedunderthefixeddesignationE595thenumberimmediatelyfollowingthedesignationindicatesthe

2、yearofiginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.Thisstardhasbeenapprovedfusebyagenci

3、esoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversascreeningtechniquetodeterminevolatilecontentofmaterialswhenexposedtoavacuumenvironment.Twoparametersaremeasured:totalmassloss(TML)collectedvolatilecondensable

4、materials(CVCM).Anadditionalparametertheamountofwatervapregained(WVR)canalsobeobtainedaftercompletionofexposuresmeasurementsrequiredfTMLCVCM.1.2Thistestmethoddescribesthetestapparatusrelatedoperatingproceduresfevaluating

5、themasslossofmaterialsbeingsubjectedto125Catlessthan710?3Pa(510?5tr)f24h.Theoverallmasslosscanbeclassifiedintononcondensablescondensables.Thelatterareacterizedhereinasbeingcapableofcondensingonacollectatatemperatureof25C

6、.NOTE1—Unlessotherwisenotedthetoleranceon25125Cis61Con23Cis62C.Thetoleranceonrelativehuityis65%.1.3Manytypesofganicpolymericinganicmaterialscanbetested.Theseincludepolymerpottingcompoundsfoamselastomersfilmstapesinsulati

7、onsshrinktubingsadhesivescoatingsfabricstiecdslubricants.Thematerialsmaybetestedinthe“asreceived”conditionpreparedftestbyvariouscuringspecifications.1.4Thistestmethodisprimarilyascreeningtechniquefmaterialsisnotnecessari

8、lyvalidfcomputingactualcontaminationonasystemcomponentbecauseofdifferencesinconfigurationtemperaturesmaterialprocessing.1.5Thecriteriausedftheacceptancerejectionofmaterialsshallbedeterminedbytheuserbaseduponspecificcompo

9、nentsystemrequirements.HisticallyTMLof1.00%CVCMof0.10%havebeenusedasscreeninglevelsfrejectionofspacecraftmaterials.1.6Theuseofmaterialsthataredeemedacceptableinaccdancewiththistestmethoddoesnotensurethatthesystemcomponen

10、twillremainuncontaminated.Therefesubsequentfunctionaldevelopmentalqualificationtestsshouldbeusedasnecessarytoensurethatthematerial’sperfmanceissatisfacty.1.7Thisstarddoesnotpurpttoaddressallofthesafetyconcernsassociatedw

11、ithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2E177PracticefUseoftheTermsPrecision

12、BiasinASTMTestMethods2.2ASTMAdjuncts:MicroVCMDetailedDrawings33.Terminology3.1Definitions:3.1.1collectedvolatilecondensablematerialCVCM—thequantityofoutgassedmatterfromatestspecimenthatcondensesonacollectmaintainedataspe

13、cificconstanttemperaturefaspecifiedtime.CVCMisexpressedasapercentageoftheinitialspecimenmassiscalculatedfromthecondensatemassdeterminedfromthedifferenceinmassofthecollectplatebefeafterthetest.3.1.2totalmasslossTML—totalm

14、assofmaterialoutgassedfromaspecimenthatismaintainedataspecifiedconstanttemperatureoperatingpressurefaspecifiedtime.TMLiscalculatedfromthemassofthespecimenasmeasuredbefeafterthetestisexpressedasapercentageoftheinitialspec

15、imenmass.1ThistestmethodisunderthejurisdictionofASTMCommitteeE21onSpaceSimulationApplicationsofSpaceTechnologyisthedirectresponsibilityofSubcommitteeE21.05onContamination.CurrenteditionapprovedMay12015.PublishedJuly2015.

16、iginallyapprovedin1977.Lastpreviouseditionapprovedin2007asE595–07.DOI:10.1520E059515.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’s

17、DocumentSummarypageontheASTMwebsite.3AvailablefromASTMInternational100BarrHarbDr.POBoxC700WestConshohockenPA19428–2959.derAdjunctADJE0595.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.Un

18、itedStates1increased.Itissuggestedthattesttemperaturebeatleast30ChigherthanexpectedmaximumservicetemperatureindertoprovidematerialcomparisonsfTMLCVCM.5.3Comparisonsofmaterialoutgassingpropertiesarevalidat125Csampletemper

19、ature25Ccollecttemperatureonly.Samplestestedatothertemperaturesmaybecomparedonlywithothermaterialswhichweretestedatthatsametemperature.5.4Themeasurementsofthecollectedvolatilecondensablematerialarealsocomparablevalidonly

20、fsimilarcollectgeometrysurfacesat25C.Sampleshavebeentestedatsampletemperaturesfrom50to400Catcollecttemperaturesfrom1to30Cbythistesttechnique.Datatakenatnonstardconditionsmustbeclearlyidentifiedshouldnotbecomparedwithsamp

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