Amathiphu we-surface passivation

I-passivation iyindlela yokunciphisa izinga lokugqwala kwensimbi ngokuguqula indawo yayo ibe yisimo esingangenwa kalula yi-oxidation. Ngaphezu kwalokho, isenzakalo sensimbi esebenzayo noma i-alloy, lapho umsebenzi wamakhemikhali unciphisa kakhulu esimweni sensimbi ehloniphekile, ubizwa nangokuthi i-passivation.
Passivation izinsimbi emvelweni kufinyelelwa ngezindlela ezimbili:
1. I-Chemical passivation: ikakhulukazi ngokusabela kwamakhemikhali phakathi kwensimbi nama-oxidants aqinile, ukwakheka kwefilimu eminyene yama-oxides noma amanye ama-compounds ebusweni bensimbi, ehlanganisa ubuso bensimbi, ihlukanise insimbi esixazululweni, ngaleyo ndlela ivimbele. Ukuqhubeka kwe-oxidation nokuhlakazeka kwensimbi.
2. I-Anodic passivation: eyaziwa nangokuthi i-electrochemical passivation, ifana ne-anode yensimbi noma inhlanganisela ngaphansi kwesenzo samanje, kuya kumazinga ahlukahlukene, ukulahlekelwa ikhono lokudlulisela isisombululo. I-anodic passivation ibangelwa i-anodic polarization ye-metal passivation phenomenon, okungukuthi, insimbi ngaphansi kwesenzo samanje, izinguquko ezingaba khona ze-electrode kanye nokwakheka kwama-oxide ensimbi noma usawoti ebusweni be-electrode, lezi zinto zimbozwe ngokuqinile. indawo yensimbi ukuze ibe ifilimu ye-passivation futhi Iholela ku-metal passivation.
Ngokuvamile, nakuba i-chemical passivation kanye ne-anodic passivation kokubili kuguqula indawo yensimbi ibe yisimo esingangenwa kalula yi-oxidation, izindlela zabo zokwakheka kanye nesizinda sohlelo lokusebenza kuhlukile. I-Chemical passivation yenza ifilimu evikelayo endaweni yensimbi ikakhulukazi ngokusabela kwamakhemikhali, kuyilapho i-anodic passivation yakha ifilimu ye-passivation endaweni yensimbi ngezinqubo ze-electrochemical, zombili eziklanyelwe ukuhlehlisa izinga lokugqwala kwensimbi.

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