Designation:F1864−05(Reapproved2010)StandardTestMethodforDustErosionResistanceofOpticalandInfraredTransparentMaterialsandCoatings1ThisstandardisissuedunderthefixeddesignationF1864;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheresistanceoftransparentplasticsandcoatingsusedinaerospacewindscreens,canopies,andviewportstosurfaceerosionasaresultofdustimpinge-ment.Thistestmethodsimulatesflightthroughadefinedparticlecloudenvironmentbymeansofindependentcontrolofparticlesize,velocity,impactangle,massloading,andtestduration.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD1003TestMethodforHazeandLuminousTransmittanceofTransparentPlasticsD1193SpecificationforReagentWaterE11SpecificationforWovenWireTestSieveClothandTestSievesE168PracticesforGeneralTechniquesofInfraredQuanti-tativeAnalysis(Withdrawn2015)33.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1massloading,n—themassofdustperunitoftotalexposedsurfacearea(includingthesampleholder)thatim-pingesonthespecimens.3.1.2meanIRtransmission,n—forthepurposesofthisstandard,theaveragepercentageoflighttransmittedbyamaterialinthe8-to12-µmbandwidth.3.1.3sweeptime,n—thetimerequiredforonetranslationpass.3.1.4translationpass,n—thetranslationofthespecimenplatformfromtheverticalorhorizontallimittothecorrespond-ingverticalorhorizontallimit.3.1.5translationcycle,n—thetranslationofthespecimenplatformfromtheverticalorhorizontallimittothecorrespond-ingverticalorhorizontallimitandbacktotheinitialverticalorhorizontal...
