Raws li cov khoom siv ua haujlwm tseem ceeb, cov khoom siv titanium tau siv dav hauv kev lag luam, kev lag luam kho mob, muaj zog kho mob thiab muaj zog tiv thaiv corrosion.
Corrosion ntawm titanium
Titanium yog ib qho thermodynamically tsis ruaj khov hlau nrog qhov tsis zoo blunt peev xwm thiab tus qauv electrode peev xwm ntawm -1.63V. Yog li ntawd, nws yog ib qho yooj yim los tsim ib tug oxide zaj duab xis nrog passivation khoom thiab zoo corrosion kuj nyob rau hauv huab cua thiab aqueous tov.
Corrosion kuj ntawm titanium alloys nyob rau hauv cov kab mob
Nws yog ib qho tseem ceeb heev los kawm txog kev tiv thaiv corrosion ntawm cov ntaub ntawv kho mob. Ntawm qhov tod tes, qee cov hlau ions lossis cov khoom siv corrosion ntawm cov khoom cog tau nkag mus rau hauv cov ntaub so ntswg lom, uas tuaj yeem ua rau muaj kev cuam tshuam ntawm lub cev sib txawv. Ntawm qhov tod tes, vim muaj cov kua dej hauv lub cev, cov khoom ntawm qee cov ntaub ntawv yuav raug degraded loj, ua rau muaj kev puas tsuaj sai lossis txawm tias tsis ua haujlwm.
Tib neeg lub cev ib puag ncig yog qhov nyuaj, nws yog ib qho yooj yim los ua kom tawg ntawm cov kab lus, hloov qhov ruaj khov ntawm oxide txheej. Kev sib txhuam me ntsis tuaj yeem ua rau cov zaj duab xis passivation tsim nyob rau saum npoo ntawm titanium raug kev puas tsuaj, xws li nyob rau hauv qhov chaw tsis muaj oxygen, qhov ruaj khov ntawm cov oxide txheej tsis muaj zog, thiab thaum puas lawm, nws tsis tuaj yeem kho tam sim ntawd lossis ib qho tshiab. oxide txheej tuaj yeem tsim tau, uas yuav ua rau corrosion. Thiab qhov xwm txheej zoo li no yuav luag tsis tuaj yeem zam dhau ntawm kev rov ua haujlwm ntawm tib neeg lub cev thiab siv cov khoom siv. Yas deformation yuav hloov lub microstructure ntawm cov ntaub ntawv, thiab ces cuam tshuam rau corrosion ntawm cov ntaub ntawv. Kev cuam tshuam ntawm cov yas deformation ntawm cov khoom siv corrosion ntawm cov khoom sib txawv heev.
Nyob rau hauv cov txheej txheem ntawm cov yas deformation, qhov concentration ntawm kev ntxhov siab sab hauv ua rau muaj qhov tsis xws luag hauv kev sib tshuam thiab cov nplej, yog li cov yas deformation yuav tsis muaj zog corrosion ntawm cov khoom.
