Passivation waa hab lagu yareeyo heerka daxalka birta iyada oo dusha sare loo beddelayo xaalad aan u nuglaanin oksaydhisku. Intaa waxaa dheer, ifafaale bir firfircoon ama daawaha, kaas oo dhaqdhaqaaqa kiimikaad si weyn hoos ugu dhacay xaalad bir ah oo sharaf leh, ayaa sidoo kale loo yaqaannaa passivation.
Gudbinta biraha deegaanka waxaa lagu gaaraa laba siyaabood:
1. Kiimikaad passivation: inta badan iyada oo loo marayo falcelinta kiimikaad ee u dhexeeya birta iyo oksaydhiyeyaasha xooggan, samaynta filim cufan oo oxides ah ama xeryahooda kale ee dusha sare ee birta, kaas oo daboolaya dusha birta, ka soocida birta ee xalka, sidaas darteed xannibaya. oksaydhka iyo kala dirida birta ee joogtada ah.
2. Anodic passivation: sidoo kale loo yaqaan passivation electrochemical, waa sida anode ka mid ah biraha ama xarunta hoos ficil ee hadda, in heerar kala duwan, si ay u lumin awoodda ay u wareejiso xalka. Anodic passivation waxaa sababa polarization anodic ee ifafaale passivation birta, taas oo ah, biraha hoos ficil ee hadda, ay electrode isbedel iman kara iyo samaynta oxides biraha ama cusbada on dusha sare ee electrode ah, walxahan waxaa si adag loo daboolay in oogada birta ah si ay u noqoto filim passivation oo u horseeda baasbeelka birta.
Guud ahaan, in kasta oo kiimikaad ku-meel-gaadhka ah iyo bakhti-mareenka anodic labaduba ay u beddelaan dusha birta xaalad ka sii yar u nuglaanshaha oksaydhka, hababka samayntooda iyo asalkooda codsigu way kala duwan yihiin. Passivation kiimikadu waxay samaysaa filim difaac ah oo ku yaal dusha birta inta badan iyada oo loo marayo falcelinta kiimikaad, halka dareenka anodic uu sameeyo filim passivation dusha birta iyada oo loo marayo hababka korantada, labadaba waxaa loogu talagalay inay dib u dhigaan heerka daxalka birta.
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Waqtiga boostada: Agoosto-14-2024