Abstract:Inrecentyears,withattentionpaidtoglobalenvironmentalproblems,therehavebeenrequirementsforcontinuousimprovementofautomobilefueleconomyandexhaustgaspurificationrate.Thepropertiesoftheferriticstainlesssteels(FSS)usedtomakeautomobilepartshavebeenimproved.Thispaperintroducestheconstructionofautomotiveexhaustsystemsanddescribestheirmainfailurebehaviorsandcorrosionevaluationprocedures.