Mapangidwe a Metal Passivation ndi Makulidwe a Passivation Film

Passivation amatanthauzidwa ngati mapangidwe woonda kwambiri zoteteza wosanjikiza pamwamba zitsulo zinthu pansi oxidizing zinthu, akwaniritsa ndi amphamvu anodic polarization, ziletsa dzimbiri.Zitsulo zina kapena aloyi amapanga wosanjikiza wosavuta woletsa pakutsegula kapena pansi pa kufooka kwa anodic polarization, potero amachepetsa kuchuluka kwa dzimbiri.Malinga ndi tanthauzo la passivation, izi sizimagwera pansi.

Mapangidwe a filimu yodutsamo ndi yopyapyala kwambiri, ndi muyeso wa makulidwe kuyambira 1 mpaka 10 nanometers.Kuzindikira kwa haidrojeni mu filimu yopyapyala ya passivation kukuwonetsa kuti filimuyo imatha kukhala hydroxide kapena hydrate.Chitsulo (Fe) n'zovuta kupanga passivation filimu pansi yachibadwa dzimbiri mikhalidwe;zimangochitika m'malo okhala ndi okosijeni kwambiri komanso pansi pa anodic polarization ku kuthekera kwakukulu.Mosiyana ndi izi, chromium (Cr) imatha kupanga filimu yokhazikika, yowundana, komanso yoteteza ngakhale m'malo ochepa oxidizing.Muzitsulo zopangidwa ndi chitsulo zomwe zili ndi chromium, pamene chromium iposa 12%, imatchedwa chitsulo chosapanga dzimbiri.Chitsulo chosapanga dzimbiri chikhoza kukhala chosasunthika munjira zambiri zamadzimadzi zomwe zimakhala ndi mpweya wambiri.Nickel (Ni), poyerekeza ndi chitsulo, sikuti imakhala ndi makina abwino kwambiri (kuphatikiza mphamvu zotentha kwambiri) komanso imawonetsa kukana kwa dzimbiri mwazinthu zonse zomwe sizingakhudze oxidizing.

Mapangidwe a Metal Passivation ndi Makulidwe a Passivation Film

Passivation amatanthauzidwa ngati mapangidwe woonda kwambiri zoteteza wosanjikiza pamwamba zitsulo zinthu pansi oxidizing zinthu, akwaniritsa ndi amphamvu anodic polarization, ziletsa dzimbiri.Zitsulo zina kapena aloyi amapanga wosanjikiza wosavuta woletsa pakutsegula kapena pansi pa kufooka kwa anodic polarization, potero amachepetsa kuchuluka kwa dzimbiri.Malinga ndi tanthauzo la passivation, izi sizimagwera pansi.

Mapangidwe a filimu yodutsamo ndi yopyapyala kwambiri, ndi muyeso wa makulidwe kuyambira 1 mpaka 10 nanometers.Kuzindikira kwa haidrojeni mu filimu yopyapyala ya passivation kukuwonetsa kuti filimuyo imatha kukhala hydroxide kapena hydrate.Chitsulo (Fe) n'zovuta kupanga passivation filimu pansi yachibadwa dzimbiri mikhalidwe;zimangochitika m'malo okhala ndi okosijeni kwambiri komanso pansi pa anodic polarization ku kuthekera kwakukulu.Mosiyana ndi izi, chromium (Cr) imatha kupanga filimu yokhazikika, yowundana, komanso yoteteza ngakhale m'malo ochepa oxidizing.Muzitsulo zopangidwa ndi chitsulo zomwe zili ndi chromium, pamene chromium iposa 12%, imatchedwa chitsulo chosapanga dzimbiri.Chitsulo chosapanga dzimbiri chikhoza kukhala chosasunthika munjira zambiri zamadzimadzi zomwe zimakhala ndi mpweya wambiri.Nickel (Ni), poyerekeza ndi chitsulo, sikuti imakhala ndi makina abwino kwambiri (kuphatikizapo kutentha kwakukulu) komanso imawonetsa kukana kwambiri kwa dzimbiri m'madera omwe si oxidizing ndi oxidizing.Pamene nickel zili mu chitsulo kuposa 8%, izo zikhazikika nkhope-centered kiyubiki kapangidwe austenite, kupititsa patsogolo passivation mphamvu ndi kupititsa patsogolo dzimbiri chitetezo.Choncho, chromium ndi faifi tambala ndi zinthu zofunika alloying mu zitsulo ndi oxidizing chilengedwe.Pamene nickel zili mu chitsulo kuposa 8%, izo zikhazikika nkhope-centered kiyubiki kapangidwe austenite, kupititsa patsogolo passivation mphamvu ndi kupititsa patsogolo dzimbiri chitetezo.Chifukwa chake, chromium ndi faifi tambala ndi zinthu zofunika kwambiri alloying mu chitsulo.