Yayin da aka san bakin karfe da juriya ga tsatsa, ba shi da cikakkiyar kariya daga lalata.Akwai dalilai da yawa da yasa bakin karfe zai iya yin tsatsa har yanzu.Na farko, gurɓatar ƙasa kamar datti, ƙura da sinadarai na iya lalata layin oxide mai karewa kuma ya fallasa ƙarfe ga lalata.Yana da mahimmanci a kai a kai tsaftace bakin karfe don cire gurɓataccen abu wanda zai iya haifar da tsatsa.Na biyu, idan bakin karfe ya hadu da wasu karafa, musamman idan ya jike, to zai lalace.