Unraveling Mysteries Of Passivation hauv Titanium Alloys

Passivation, ib lo lus uas yuav suab txawv me ntsis, tiag tiag yog hais txog cov txheej txheem los ntawm cov hlau hloov mus rau hauv lub xeev uas tsis tshua muaj kev cuam tshuam rau oxidation los ntawm ib txoj kev tshwj xeeb, yog li ua rau tus nqi ntawm corrosion. Ntawm lawv, tshwj xeeb active hlau los yog hlau alloy, thaum nws cov tshuaj lom neeg kev ua si yog ho txo, raws li metamorphosed mus rau hauv ib tug precious hlau zoo li tshwm sim, los yog passivation.
Nyob rau hauv lub ntiaj teb no ntawm hlau, titanium thiab titanium alloys paub rau lawv zoo heev passivation zog. Nyob rau hauv ib lub sij hawm luv luv, lawv muaj peev xwm tsim ib txheej ntawm ob peb nanometers mus rau kaum nanometers tuab oxide zaj duab xis, uas yog zoo li ib txheej ntawm muaj zog armor, tiv thaiv titanium alloy los ntawm ib puag ncig sab nraud, kom nws qhia tau zoo heev corrosion kuj.

Yog li, ua li cas titanium alloy paub txog cov txheej txheem passivation zoo kawg nkaus? Muaj peb txoj hauv kev tseem ceeb:
Ua ntej, electrochemical passivation
Xav txog tias thaum titanium alloy raug rau ib puag ncig electrochemical, nws saum npoo yuav raug oxidized, tsim cov oxide tuab. Cov yeeb yaj kiab no tuaj yeem tsis tsuas yog tiv thaiv corrosion ntawm titanium alloy hauv tshuaj lom neeg, tab sis kuj tiv thaiv khawb thaum ua. Muaj ob lub ntsiab ntawm electrochemical passivation: anodic oxidation thiab cathodic txo, ntawm cov anodic oxidation yog dav siv rau cov khoom titanium, xws li titanium khob thiab titanium chopsticks. Nws tuaj yeem tsim cov xim tsis muaj xim thiab pob tshab oxide zaj duab xis rau saum npoo ntawm cov khoom titanium, uas nthuav tawm cov xim zoo nkauj los ntawm lub teeb pom kev zoo, ua rau cov khoom siv hlau titanium muaj qhov zoo heev.
Thib ob, kev kho cua sov passivation
Thaum tshav kub kub kev kho mob passivation yog cov titanium alloy mus rau hauv lub kub kub rauv, nyob rau hauv ib tug tshwj xeeb lub sij hawm thiab kub, thiaj li hais tias lub nto ntawm tsim ntawm ib tug tuab txheej ntawm oxidation. Tom qab ntawd, los ntawm kev kho cua txias sai, txheej txheej ntawm oxidized txheej yuav ua ntom ntom, yog li txhim kho corrosion kuj ntawm titanium alloy.
Thib peb, tshuaj kho mob passivation
Tshuaj kho mob passivation muaj xws li pickling thiab tshuaj passivation ob kauj ruam. Pickling tuaj yeem tshem tawm cov roj, oxide zaj duab xis thiab impurities nyob rau saum npoo ntawm titanium alloy, los tsim cov kev mob zoo rau cov tshuaj lom neeg tom ntej. Chemical passivation yog titanium alloy rau hauv cov tshuaj uas muaj cov tshuaj tshwj xeeb, yog li ntawd qhov chaw ntawm qhov tsim ntawm ib txheej ntawm ntom oxide zaj duab xis, yog li txhim kho cov kav ntev thiab corrosion ntawm titanium alloy.
Nyob rau hauv tus txheej txheem ntawm pickling passivation, peb yuav tsum tau xyuam xim rau cov nram qab no cov ntsiab lus: ua ntej, kev kho mob ua ntej txaus yuav tsum tau nqa tawm kom paub meej tias lub nto ntawm titanium alloy yog dawb ntawm av; thib ob, cov txheej txheem tsis nyob rau hauv cov txheej txheem pickling yuav tsum nruj me ntsis tswj, xws li qhov ratio ntawm nitric acid tov thiab lub sij hawm pickling, thiab lwm yam .; thiab thaum kawg, kev kho mob tom qab yuav tsum tau nqa tawm, suav nrog kev yaug thiab ziab, txhawm rau tshem tawm cov tshuaj seem thiab noo noo ntawm qhov chaw.
Nyob rau hauv xaus, cov txheej txheem passivation ntawm titanium alloy yog ib qho amazing nto kho tshuab. Nws tuaj yeem tsis tsuas yog txhim kho qhov zoo ntawm qhov chaw thiab cov khoom siv ntawm titanium alloy, tab sis kuj cia peb txaus siab rau qhov zoo nkauj ntawm cov hlau thaum hnov ​​​​cov khawv koob ntxim nyiam coj los ntawm thev naus laus zis.