Hauv cov khoom siv hlau,titanium thiab titanium alloyssawv tawm rau lawv cov khoom tshwj xeeb thiab tau siv dav hauv ntau lub lag luam xws li aerospace, khoom siv kho mob, thiab tshuaj lom neeg. Passivation thev naus laus zis, raws li cov thev naus laus zis tseem ceeb rau kev txhim kho kev ua haujlwm thiab ua haujlwm ntev ntawm titanium alloys, plays lub luag haujlwm tseem ceeb.
Lub tswv yim tseem ceeb ntawm passivation thiab lub ntuj zoo ntawm titanium alloys: Passivation yog hais txog cov txheej txheem ntawm oxidizing ib tug hlau nrog muaj zog oxidants los yog electrochemical txoj kev, ua rau nws nto inactive. Lub hom phiaj yog los hloov cov hlau nto rau hauv lub xeev uas tsis yooj yim oxidized, yog li ua kom qeeb ntawm corrosion.
Tsis tas li ntawd, qhov tshwm sim uas cov tshuaj lom neeg ua haujlwm ntawm cov hlau siv los yog hlau yog txo qis heev, mus txog lub xeev zoo ib yam li cov hlau tsis zoo, kuj hu ua passivation. Titanium thiab titanium alloys muaj cov khoom siv zoo heev, ua tsaug rau kev tsim sai ntawm cov yeeb yaj kiab oxide nrog lub thickness ntawm ob peb nanometers thiab kaum nanometers ntawm lawv qhov chaw. Lub ntuj oxide zaj duab xis no ua haujlwm zoo li "cov cuab yeej" muaj zog, muab titanium alloys zoo heev corrosion kuj thiab ua rau lawv muaj kev ruaj ntseg hauv ntau qhov chaw hnyav.
Electrochemical passivation yog ib qho txheej txheem passivation rau titanium alloys. Nws siv cov txheej txheem electrochemical los tsim cov yeeb yaj kiab oxide ntom ntom rau ntawm qhov chaw ntawm titanium alloy. Cov yeeb yaj kiab oxide no ua rau muaj kev tiv thaiv zoo, tiv thaiv corrosion hauv tshuaj lom neeg thiab tsis txhob khawb thaum ua haujlwm. Electrochemical passivation feem ntau suav nrog ob txoj hauv kev: anodic oxidation thiab cathodic txo, nrog anodic oxidation yog qhov siv dav tshaj plaws hauv titanium thiab titanium alloy khoom. Noj cov khoom siv titanium, xws li titanium khob thiab chopsticks, ua piv txwv, anodic oxidation ua rau nyias nyias (tsis muaj xim thiab pob tshab) oxide zaj duab xis ntawm nws qhov chaw. Thaum lub teeb ci rau ntawm zaj duab xis oxide no, refraction tshwm sim, thiab qhov sib txawv thicknesses ntawm oxide zaj duab xis yuav ua rau tib neeg lub qhov muag pom cov xim sib txawv. Lub thickness ntawm oxide zaj duab xis pib los ntawm qhov tsawg kawg nkaus ntawm 0.01 μm thiab maj mam nce nyob rau hauv increments ntawm 0.01 μm, mus txog qhov siab tshaj plaws ntawm 0.15 μm. Nws yog qhov kev hloov pauv no hauv cov tuab uas tso cai rau cov khoom siv hlau ntshiab titanium los nthuav tawm cov xim nplua nuj thiab zoo nkauj, yog li tau txais titanium lub koob npe nrov ntawm cov khoom siv hlau zoo li npau suav.
Chemical passivation muaj ob kauj ruam: pickling thiab tshuaj passivation. Pickling yog ib txoj hauv kev ua cov titanium thiab titanium alloys. Nws lub luag haujlwm tseem ceeb yog tshem tawm cov roj, oxide zaj duab xis, thiab cov impurities los ntawm qhov chaw ntawm titanium alloys, tsim kom muaj txiaj ntsig zoo rau cov tshuaj lom neeg tom ntej. Tshuaj passivation yuav immersing lub nto ntawm lub titanium alloy nyob rau hauv ib tug tov uas muaj cov tshuaj tshwj xeeb, ua rau ib tug ntom oxide zaj duab xis rau ntawm qhov chaw, yog li stabilizing lub nto thiab txhim kho lub durability thiab corrosion kuj ntawm titanium alloy.
Hauv kev xaus, titanium alloy passivation yog ib qho kev siv thev naus laus zis uas siv los tshem tawm cov oxides, cov khoom siv corrosion, thiab lwm yam impurities los ntawm qhov chaw ntawm titanium alloys, txhim kho lawv cov khoom zoo thiab cov khoom siv. Los ntawm kev siv cov txheej txheem sib txawv xws li electrochemical passivation, kev kho cua sov passivation, thiab tshuaj lom neeg kev kho mob passivation, nrog rau kev tswj xyuas nruj thiab kev ua haujlwm ntawm cov txheej txheem pickling passivation, titanium alloys tuaj yeem tswj tau qhov kev ua tau zoo hauv ntau qhov chaw hnyav, txuas ntxiv lawv lub neej kev pab cuam thiab muab kev txhawb zog rau kev loj hlob ntawm ntau yam lag luam. Nrog kev txhim kho thev naus laus zis tas mus li, titanium alloy passivation thev naus laus zis yuav txuas ntxiv txhim kho thiab tsim kho tshiab, qhib qhov kev cia siab ntau dua rau kev siv cov titanium alloys.
Baoji Reliab Metal Materials Co., Ltd
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Chaw Muag Khoom 1: WhatsApp +8613092900605 (Mr.Gary)
Chaw Muag Khoom 2: +8613092913521(Ms. Sophia)
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