A lokacin handling, taro, waldi, waldi kabu dubawa, da kuma sarrafa na ciki liner faranti, kayan aiki, da kuma na'urorin haɗi na bakin karfe tankuna, daban-daban surface gurɓata kamar tabo mai, scratches, tsatsa, datti, low-narke-point pollutants karfe. An gabatar da fenti, walda, da splatter.Wadannan abubuwa suna shafar ingancin bakin karfe, suna lalata fim ɗin wucewar sa, suna rage juriyar lalata ƙasa, kuma suna sanya shi mai saurin kamuwa da lalatawar kafofin watsa labarai a cikin samfuran sinadarai da ake jigilar su daga baya, suna haifar da pitting, lalata intergranular, har ma da fashewar lalata.
Tankunan bakin karfe, saboda ɗaukar sinadarai iri-iri, suna da manyan buƙatu don hana gurɓacewar kaya.Kamar yadda ingancin faranti na bakin karfe da aka kera a cikin gida ba su da kyau, al'ada ce ta gama gari don yin aikin injiniya, sinadarai, koelectrolytic polishinga kan faranti na bakin karfe, kayan aiki, da na'urorin haɗi kafin tsaftacewa, pickling, da passivating don haɓaka juriyar lalata bakin karfe.
Fim ɗin wucewa akan bakin karfe yana da halaye masu ƙarfi kuma bai kamata a yi la'akari da shi a matsayin cikakken dakatar da lalata ba sai dai samuwar Layer na kariya mai yaduwa.Yana ƙoƙarin lalacewa a gaban abubuwan ragewa (irin su ions chloride) kuma yana iya kariya da gyarawa a gaban oxidants (kamar iska).
Lokacin da bakin karfe yana nunawa zuwa iska, fim din oxide yana samuwa.
Koyaya, kayan kariya na wannan fim ɗin basu wadatar ba.Ta hanyar tsinkar acid, matsakaicin kauri na 10μm nabakin karfe surfaceya lalace, kuma aikin sinadari na acid yana sanya adadin narkar da shi a wuraren lahani sama da sauran wuraren da ke sama.Don haka, pickling yana sa duk faɗin saman ya zama ma'auni iri ɗaya.Mahimmanci, ta hanyar pickling da passivation, baƙin ƙarfe da oxides ɗinsa suna narkewa da kyau idan aka kwatanta da chromium da oxides, cire chromium-depleted Layer da wadatar da saman tare da chromium.A karkashin passivating mataki na oxidants, cikakken da kuma barga passivation film aka kafa, tare da yuwuwar wannan chromium-arzikin passivation film kai +1.0V (SCE), kusa da m na daraja karafa, inganta lalata juriya kwanciyar hankali.
Lokacin aikawa: Nuwamba-28-2023