Wayar jan karfe da aka daskare, waya ce da ba a rufe ta ba wacce aka lullube ta da ruwan gwangwani. Me yasa kuke buƙatar waya ta jan karfe mai kwano? Kwanan nan da aka ƙera, sabon madubin jan ƙarfe maras kyau yana aiki da kyau, amma mara waya ta jan ƙarfe yana da yuwuwar samun iskar oxygen a cikin lokaci fiye da takwaransa na tinner. Oxidation na danda waya yana haifar da lalacewa da gazawar sa a aikin lantarki. Rufin kwano yana kare waya daga iskar oxygen a cikin yanayin danshi da ruwan sama, yanayin zafi mai zafi, da kuma wasu nau'ikan ƙasa. Gabaɗaya, ana amfani da tagulla mai daskare a cikin mahalli da ke da dogon lokaci ga wuce gona da iri don tsawaita rayuwar masu gudanar da jan karfe.
Bare jan karfe da wayoyi na jan karfen tinned daidai suke, amma na karshen yana ba da kariya mai karfi daga lalata da iskar oxygen. Ga wasu fa'idodin wayoyi na jan ƙarfe na tinned:
An fi son wayoyi na jan ƙarfe da aka ƙera don yanayin zafi da zafi. Wadannan su ne wasu takamaiman aikace-aikace:
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