Passivation wata hanya ce ta rage yawan lalata ƙarfe ta hanyar mayar da samansa zuwa yanayin da ba shi da sauƙi ga oxidation. Bugu da kari, al'amarin na wani aiki karfe ko alloy, a cikinsa da sinadaran da aka rage da yawa zuwa wani yanayi na daraja karfe, kuma ake kira passivation.
Passivation na karafa a cikin muhalli yana samuwa ta hanyoyi biyu:
1. Chemical passivation: yafi ta hanyar sinadaran dauki tsakanin karfe da kuma karfi oxidants, samuwar wani m fim na oxides ko wasu mahadi a saman da karfe, wanda ya rufe karfe surface, ware karfe daga bayani, don haka impeding. Karfe Ci gaba da hadawan abu da iskar shaka da rushewa.
2. Anodic passivation: kuma aka sani da electrochemical passivation, shi ne a matsayin anode na karfe ko fili a karkashin mataki na halin yanzu, zuwa sãɓãwar launukansa digiri, to rasa ikon canja wurin zuwa bayani. Anodic passivation yana faruwa ne ta hanyar anodic polarization na sabon abu na wucewar ƙarfe, wato karfen da ke ƙarƙashin aikin na yanzu, canjin wutar lantarkinsa da kuma samuwar ƙarfe oxides ko salts a saman wutar lantarki, waɗannan abubuwa an rufe su sosai. da karfe surface ya zama passivation film kuma Yana kaiwa ga karfe passivation.
Gabaɗaya, duk da cewa wucewar sinadari da ƙetare na anodic duk suna canza farfajiyar ƙarfe zuwa yanayin da ba shi da sauƙin kamuwa da iskar shaka, hanyoyin samuwarsu da asalin aikace-aikacensu sun bambanta. Chemical passivation Forms wani m fim a kan karfe surface yafi ta hanyar sinadaran halayen, alhãli kuwa anodic passivation Forms a passivation fim a kan karfe surface ta electrochemical tafiyar matakai, dukansu an tsara su retard kudi na lalata da karfe.
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Lokacin aikawa: Agusta-14-2024