Passivation, uas suab me ntsis txawv txawv, tau hais txog cov txheej txheem uas ib tug hlau yog qhov tsis tshua muaj kev cuam tshuam los ntawm ib txoj kev tshwj xeeb, yog li maj mam nqes tus nqi ntawm corrosion. Ntawm lawv, ib qho tshwj xeeb hlau lossis alloy, thaum nws cov tshuaj lom neeg raug txo qis, raws li metamorphosed rau cov khoom muaj nqis, tseem hu ua kev caij siab.
Nyob hauv lub ntiaj teb ntawm cov hlau, titanium thiab titanium alloys paub txog lawv cov khoom lag luam zoo tshaj plaws. Nyob rau lub sijhawm luv luv, lawv tuaj yeem tsim ib txheej ntawm ob peb tus nanometers rau kaum ntawm cov duab ua ke oxide, yog li ntawd nws qhia tau cov khoom sab nraud, yog li ntawd nws qhia tau zoo heev corrosion.
Yog li, Titanium Alloy thiaj li paub txog cov txheej txheem passivation passivation no? Nws muaj peb txoj kev tseem ceeb:
Ua ntej, Electrochemical passivation
Xav txog tias thaum titanium alloy yog nthuav tawm ib puag ncig electrochemical, nws cov nplaim av yuav oxidized, sib sau ua yeeb yaj kiab dense. Zaj yeeb yaj kiab no tsis tuaj yeem tiv thaiv kev ua kom tiv thaiv kev mob corrosion ntawm titanium alloy hauv tshuaj me me hauv tshuaj, tab sis kuj tseem tiv thaiv khawb thaum lub sijhawm ua. Muaj ob hom ntsiab ntawm electrochemical passivation: anodic oxidation thiab cathodic txo qis siv rau titanium khob thiab titanium choppsticks. Nws tuaj yeem tsim ib txheej ntawm cov xim tsis muaj xim thiab pob tshab oxide zaj duab xis nyob rau saum npoo ntawm titanium hlau cov ntaub ntawv muaj cov khoom lag luam zoo nkauj.
Thib ob, Kho Cua Sov Passivation
Kev kho cua sov passivation yog lub titanium alloy rau hauv cov cua sov kub, nyob rau hauv lub sijhawm kub thiab kub, kom lub qhov txheej ntawm oxidation. Tom qab, los ntawm kev kho txias sai sai, cov txheej txheej ntawm oxidation yuav dhau los ua kom tuab, yog li txhim kho cov corrosion tsis kam ntawm titanium alloy.
Thib peb, kho cov tshuaj lom neeg
Tshuaj lom neeg kev kho kom muaj raws li ob kauj ruam ntawm pickling thiab tshuaj lom neeg. Pickling tuaj yeem tshem tawm cov roj, oxide zaj duab xis thiab impurities nyob rau saum npoo ntawm titanium alloy, los tsim cov yeeb yam zoo rau cov tshuaj lom neeg passivation tom ntej. Tshuaj lom neeg passive yog lub titanium alloy rau hauv kev daws cov tshuaj dense, yog li txhim kho cov tshuaj lom neeg distense thiab corrosion tsis zoo ntawm titanium alloy.
Nyob rau hauv cov txheej txheem ntawm pickling passivation, peb yuav tsum tau them sai sai rau cov ntsiab lus hauv qab no: Ua ntej kev kho mob yuav tsum tau nqa tawm kom ntseeg tau tias cov titanium alloy yog dawb ntawm av; Qhov thib ob, cov txheej txheem tsis tas yuav tsum tau nruj me ntsis, xws li qhov piv ntawm nitric kua qaub thiab lub sijhawm xaiv .; Thaum kawg, tom qab kev kho mob yuav tsum tau nqa tawm, suav nrog yaug thiab ziab, txhawm rau tshem cov kev daws teeb meem thiab noo noo ntawm cov nplaim dej.
Hauv kev xaus, cov txheej txheem passivation ntawm titanium alloy yog qhov kev kho tshuab hluav taws xob zoo nkauj. Nws tsis tuaj yeem txhim kho cov khoom zoo thiab cov khoom siv ntawm titanium alloy, tab sis kuj tseem cia peb txaus siab rau txoj kev zoo nkauj ntawm cov hlau thaum kuv tau ntxim nyiam coj los ntawm kev siv thev naus laus zis.
