Thaum cov tuam txhab tsim khoom thiab cov neeg siv ntsib teeb meem corrosion tshwm sim los ntawm cov tshuaj chlorine thiab cov tshuaj chlorine, lawv yuav pom titanium cov khoom tiv thaiv muaj txiaj ntsig zoo rau ntau qhov kub thiab txias.
Nyob rau hauv feem ntau oxidizing, nruab nrab thiab inhibiting txo tej yam kev mob, titanium thiab nws alloys muaj zoo heev corrosion kuj. Txawm hais tias lawv yuav raug tawm tsam los ntawm kev txo qis lossis kev tawm xov xwm nyuaj, lawv tseem nyob twj ywm nyob rau hauv kev txo qis me ntsis. Lub corrosion kuj ntawm titanium hlau yog vim muaj kev ruaj khov, tiv thaiv thiab nplaum oxide zaj duab xis. Cov yeeb yaj kiab no tshwm sim tam sim ntawd thaum lub ntsej muag tshiab raug huab cua lossis noo noo. Los ntawm cov kws tshaj lij cov lus, thaum lub ntsej muag huv ntawm titanium raug rau huab cua, oxide zaj duab xis yuav raug tsim sai sai. Lub thickness yog hais txog 12-16 angstroms.Hais txog 50 angstroms tom qab 70 hnub. Nws txuas ntxiv mus qeeb, nce mus txog qhov tuab ntawm 80-90 angstroms tom qab 545 hnub thiab 250 angstroms tom qab plaub xyoos. Kev loj hlob ntawm zaj duab xis yog nrawm nyob rau hauv muaj zog oxidizing tej yam kev mob, xws li cua sov nyob rau hauv cov huab cua, anodic polarization nyob rau hauv ib tug electrolyte, los yog raug oxidizing agents xws li hyponitric acid, chromic acid, thiab lwm yam. Cov txheej txheem oxidation txhawb kev tsim ntawm titanium dioxide, yog li nyob rau hauv qhov chaw no, cov yeeb yaj kiab feem ntau yog titanium dioxide. Cov yeeb yaj kiab yog pob tshab hauv nws cov qauv nyias nyias thiab tsis tuaj yeem kuaj pom los ntawm kev pom. Thaum peb kawm txog corrosion kuj ntawm titanium, peb tsuas yog yuav tsum tau kawm cov khoom ntawm oxide zaj duab xis.Cov oxide zaj duab xis ntawm titanium yog ruaj khov heev. Nws tsuas yog tawm tsam los ntawm ob peb yam tshuaj, tshwj xeeb tshaj yog hydrofluoric acid. Nyob rau hauv txhua qhov chaw uas muaj cov dej noo lossis cov pa oxygen, titanium kho cov yeeb yaj kiab no yuav luag tam sim ntawd vim tias nws muaj kev sib raug zoo rau oxygen. Kev siv thaum tsis muaj oxygen thiab dej yuav tsum raug zam vim tias cov yeeb yaj kiab tiv thaiv yuav tsis rov tsim dua yog tias puas.
Titanium yog qhov tshwj xeeb ntawm cov hlau hauv kev tuav cov cheeb tsam no, qhov twg titanium tsis raug corroded los ntawm aqueous tov ntawm chlorine thiab chlorine tebchaw.Ntau yam ntawm titanium daim ntaub ntawv yog raws li corrosion kuj ntawm titanium nyob rau hauv moist chlorine gas thiab chloride uas muaj cov ntsiab lus. Titanium yog dav siv nyob rau hauv chlor-alkali cell, dimensionally ruaj khov anodes, bleaching khoom rau pulp thiab ntawv, thiab nyob rau hauv lub tshav kub exchangers, twj, kav dej thiab cov hlab ntsha rau zus tau tej cov organic intermediates thiab cov pa phem tswj li.
Cov tshuaj chlorine
Titanium yog dav siv los tswj cov tshuaj chlorine noo thiab muaj lub koob npe nrov rau nws cov kev ua tau zoo hauv cov kev pabcuam no. Cov khoom muaj zog oxidizing ntawm moist chlorine passivate titanium, uas ua rau corrosion tus nqi ntawm titanium hauv moist chlorine tsawg.
Cov tshuaj chlorine qhuav tuaj yeem tua titanium sai thiab tseem ua rau iginate thaum cov dej noo tsawg txaus. Txawm li cas los xij, 1 feem pua dej feem ntau yog txaus rau passivate lossis repassivate titanium tom qab kev puas tsuaj hauv cov tshuaj chlorine nyob rau hauv cov xwm txheej zoo li qub ntawm chav tsev kub. Ntau npaum li cas cov ntsiab lus noo noo xav tau nyob rau hauv qhov tseeb, cuam tshuam los ntawm cov roj siab, roj ntws thiab kub, nrog rau kev puas tsuaj rau cov oxide zaj duab xis ntawm titanium. Passivation pom tau tias yuav tsum muaj li ntawm 1.5 feem pua ntawm cov dej noo ntawm 390 degree F (199 degree ). Kev saib xyuas yuav tsum tau ua thaum siv titanium hauv cov tshuaj chlorine uas muaj cov dej noo tsawg.
Cov tshuaj chlorine
Hauv kev daws teeb meem ntawm chlorine dioxide, chlorite, sodium hypochlorite, chlorate thiab perchlorate, titanium yog resistant tag nrho. Cov khoom siv titanium tau siv rau hauv kev lag luam ntawm cov ntaub ntawv thiab cov ntawv los ua cov tshuaj no tau ntau xyoo yam tsis muaj kev cuam tshuam txog kev xeb. (5) Titanium yog siv niaj hnub no hauv yuav luag txhua yam khoom siv hauv cov nroj tsuag tshuaj dawb niaj hnub uas ua cov tshuaj chlorine ntub dej lossis cov tshuaj chlorine, xws li cov tshuaj chlorine dioxide mixers, kav dej thiab ntxhua khaub ncaws. Nyob rau hauv lub neej yav tom ntej, cov ntawv thov no yuav tsum nthuav dav, suav nrog kev siv titanium hauv chlorine dioxide generators thiab cov khoom siv rov qab dej khib nyiab.
Chloride
Hauv kev daws teeb meem nruab nrab chloride, txawm tias nyob rau hauv qhov kub thiab txias, titanium kuj muaj kev ua tau zoo heev hauv kev tiv thaiv corrosion. Titanium feem ntau nthuav tawm cov nqi qis heev hauv chloride ib puag ncig. Txawm li cas los xij, qee zaum titanium thiab nws cov alloys raug txwv tsis pub siv rau hauv qhov chaw aqueous chloride vim yog crevice corrosion.Thaum crevices tshwm sim, titanium qee zaum corrodes thiab tus nqi corrosion tsis tuaj yeem kwv yees. Peb cov kev tshawb fawb qhia tau hais tias pH thiab qhov kub thiab txias yog qhov tseem ceeb hloov pauv rau crevice corrosion hauv brine.
Cov khoom siv titanium;
Thaum tshav kub kub exchanger / cia tank / condenser / radiator
Dimentional ruaj khov anode
Titanium piping / twj tso kua mis / fittings / flanges
Titanium cov hlab ntsha
Titanium venturi txhuam
Xav paub ntau ntxiv, thov nyem qhov txuas hauv qab no;
Sodium Hypochlorite Cia Tank
Titanium Cia Tank Rau Sodium Hypochlorite
Titanium Flanges Rau Cia Tank
Titanium Centrifugal Pump Rau Sodium Hypochlorite
Welded Titanium Yeeb Nkab Rau Sodium Hypochlorite
Heat Conducting Pipe nyob rau hauv Seawater Desalination Equipment
Titanium Tube Evaporators Case In Multistage Flash (MSF)
Seawater Desalination Khoom Taw Qhia
Corrosion Mechanism Ntawm Seawater Equipment
Titanium yog cov khoom siv zoo tshaj plaws rau cov khoom siv cua sov ntawm Seawater Desalination