EN16602-70-17:2020isaEuropeanstandardtitled"Spaceproductassurance—Durabilitytestingofcoatingsandsurfacetreatments."Itprovidesguidelinesandrequirementsfortestingthedurabilityofcoatingsandsurfacetreatmentsusedinspaceproductstoensuretheirperformanceandreliabilityintheharshspaceenvironment.Thestandardcoversvariousaspects,includingtestmethods,evaluationcriteria,andproceduresforassessingtheresistanceofcoatingsandsurfacetreatmentstofactorssuchasthermalcycling,radiation,vacuum,andmechanicalstress.Itaimstoverifythatthesematerialsmaintaintheirfunctionalandprotectivepropertiesthroughoutthemissionlifecycle.Keytopicsinclude:-Selectionoftestmethodsbasedonapplicationandenvironmentalconditions.-Preparationoftestspecimensandconditioning.-Performanceofacceleratedagingteststosimulatelong-termexposure.-Assessmentofchangesinpropertieslikeadhesion,appearance,andfunctionality.-Documentationandreportingoftestresults.Thisstandardisessentialformanufacturersandsuppliersinthespaceindustrytoensureproductqualityandmissionsuccess.