Titanium immersion heaters nyob rau hauv qis -qib txheej txheem dej feem ntau tau ntev - lub sij hawm zoo li qub soaking thaum lub sij hawm standby. Tsawg-concentration chloride ions tseem nyob hauv cov dej zoo li qub thiab tsis tu ncua ua rau cov titanium oxide passive zaj duab xis ntawm chav tsev kub. Tsis zoo li siab -kub tshuaj chloride yaig, zoo li qub qis-kub tshuaj chloride infiltration ua rau qeeb pom qhov pore expansion puas yam tsis muaj qhov chaw pitting.
Lub ntsiab degradation mechanism yog static chloride pore propagation qaug zog. Chloride ions maj mam nkag mus rau cov zaj duab xis passive lub hauv paus nano- pores thaum lub sij hawm ntev static soaking. Rov ua dua qhov chaw tos txais- cov cua kub cua sov ua kom cov ion tsiv teb tsaws, ua kom cov pore me me thiab tsim cov kev sib txuas tsis sib xws. Cov pores nkag mus no ua rau cov yeeb yaj kiab compactness, ua rau maj mam poob ntawm kev tiv thaiv-corrosion barrier kev ua tau zoo.
Thaum ntxov- theem tsis ua hauj lwm qhia tau hais tias cov matte dawb oxide nto tsis muaj pits lossis tawg. Film pore propagation defects yog kiag li tsis pom ntawm qhov muag liab qab. Qhov tsuas yog latent feature yog pom tseeb kev ua haujlwm attenuation tom qab ntev standby mus. Cov neeg ua haujlwm saib xyuas ntseeg tias titanium yog cov tshuaj chlorine- tiv taus thiab tsis quav ntsej txog cov yeeb yaj kiab zoo li qub latent qaug zog. Cov tswv yim tiv thaiv muaj txiaj ntsig suav nrog kev hloov pauv dej tsis tu ncua, kev saib xyuas cov dej ntws tawm, thiab kev ntsuas cov yeeb yaj kiab tsis zoo.
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Static Chloride Soaking Condition |
Zaj duab xis Fatigue Risk |
Core Degradation Mechanism |
Thaum ntxov - theem Feature |
Core Control Strategy |
|---|---|---|---|---|
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Ntev -lub sij hawm static soaking nyob rau hauv qis -concentration chloride dej |
Siab |
Static chloride infiltration expands zaj duab xis micro- pores; interconnected defects induce zais barrier kev ua tau zoo lwj |
Uniform matte nto; flawless tsos; standby- voj voog kev ua tau zoo attenuation |
Kev hloov dej tsis tu ncua; standby cov kua dej; zaj duab xis compactness soj ntsuam |
|
Dynamic circulating chloride dej ua haujlwm lub xeev |
Tsawg |
Kev khiav dej num tiv thaiv ion enrichment; passive zaj duab xis tuav ntom ntom thiab ruaj khov pore-dawb qauv |
Kev tiv thaiv kev ua haujlwm ruaj khov thiab tsis zoo oxide zaj duab xis morphology |
Txais yuav dynamic circulating lag luam kom tsis txhob static ion tsub zuj zuj |
Xaus:Ntev -lub sij hawm static chloride soaking induces passive zaj duab xis pore propagation qaug zog thiab latent degradation ntawm titanium heaters. Dynamic dej ncig thiab standby ntws zoo stabilize zaj duab xis compactness.
