I-Passivation yindlela yokunciphisa isantya sokubola kwesinyithi ngokuguqula umphezulu wayo ube kwimeko engenakuchaphazeleka kancinci kwi-oxidation. Ukongezelela, isenzeko sesinyithi esisebenzayo okanye i-alloy, apho umsebenzi weekhemikhali uncitshiswe kakhulu kwindawo yentsimbi ehloniphekileyo, ubizwa ngokuba yi-passivation.
Ukugqithiswa kwesinyithi kwindalo kufezekiswa ngeendlela ezimbini:
1. I-Chemical passivation: ubukhulu becala ngokusabela kweekhemikhali phakathi kwesinyithi kunye ne-oxidants eqinile, ukubunjwa kwefilimu eshinyeneyo yee-oxides okanye ezinye iikhompawundi kumphezulu wesinyithi, ogubungela umphezulu wesinyithi, ukwahlula isinyithi kwisisombululo, ngaloo ndlela kuthintela. isinyithi Ukuqhubekeka kwe-oxidation kunye nokunyibilika.
2. I-Anodic passivation: eyaziwa ngokuba yi-electrochemical passivation, ifana ne-anode yensimbi okanye i-compound phantsi kwesenzo sangoku, ukuya kwiidigri ezihlukeneyo, ukulahlekelwa amandla okudlulisela kwisisombululo. I-anodic passivation ibangelwa yi-anodic polarization ye-metal passivation phenomenon, oko kukuthi, isinyithi esiphantsi kwesenzo sangoku, utshintsho olunokwenzeka lwe-electrode kunye nokwakheka kwee-oxide zetsimbi okanye iityuwa kumphezulu we-electrode, ezi zinto zigqunywe ngokuqinileyo ngaphakathi. umphezulu wesinyithi ukuba ube yifilimu yokudlula kwaye Ikhokelela kwi-metal passivation.
Ngokuqhelekileyo, nangona i-chemical passivation kunye ne-anodic passivation zombini iguqula ubuso bentsimbi ibe yimeko engaphantsi kwe-oxidation, iindlela zabo zokwenza kunye nemvelaphi yesicelo ziyahluka. I-Chemical passivation yenza ifilimu ekhuselayo kumphezulu wesinyithi ikakhulu ngokusabela kweekhemikhali, ngelixa i-anodic passivation yenza ifilimu yokudlula kumphezulu wesinyithi ngokusebenzisa iinkqubo ze-electrochemical, zombini ziyilelwe ukuhlehlisa isantya sokuhlwa kwesinyithi.
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Ixesha lokuposa: Aug-14-2024