Ƙarfafa tukwane tukwane da aka lulluɓe da wani nau'i na ƙarfe, yana ba su damar kasancewa da ƙarfi ga abubuwan ƙarfe. Wannan tsari yawanci ya ƙunshi ajiye wani Layer na ƙarfe a saman yumbu, sannan kuma zafin zafin jiki don haɗa yumbu da ƙarfe. Kayan aikin ƙarfe na yau da kullun sun haɗa da molybdenum-manganese da nickel. Saboda yumbu 'kyakkyawan rufin, zafi mai zafi, da juriya na lalata, ana amfani da yumbu mai ƙarfe sosai a cikin masana'antar lantarki da masana'antar lantarki, musamman a cikin injin injin lantarki, na'urorin lantarki, na'urori masu auna firikwensin, da capacitors.

Ana amfani da yumbu mai ƙarfe da ƙarfe a cikin aikace-aikacen da ke buƙatar kwanciyar hankali mai zafi, ƙarfin injina, da kyakkyawan aikin lantarki. Alal misali, ana amfani da su a cikin marufi na gubar don na'urorin lantarki, masu amfani da na'urorin lantarki, na'urorin zafi don na'urorin laser, da gidaje don kayan aikin sadarwa mai girma. Rufewa da haɗin gwiwa na yumbu mai ƙarfe na ƙarfe yana tabbatar da amincin waɗannan na'urori a cikin matsanancin yanayi.