316L stainless hlau yog thawj industrialized nyob rau hauv 1970s raws li ib tug upgraded low -carbon stainless hlau optimized rau ntub industrial ua ib puag ncig. Tsim los tiv thaiv me me chloride yaig thiab atmospheric oxidation, nws sai sai los ua cov khoom siv cua sov rau dej, tshuaj pretreatment, thiab zaub mov fermentation industries. Nws cov txiaj ntsig tseem ceeb ntawm kev lag luam yog nyob rau hauv kev sib npaug ntawm cov khoom siv dag zog, tus nqi qis, thiab kev txhim kho corrosion yooj yim rau cov dej tsis zoo ntawm cov txheej txheem ntau heev. Txawm li cas los xij, feem ntau cov ntaub ntawv hauv kev lag luam tsuas yog ntsuas cov xwm txheej tsis tu ncua, tsis quav ntsej txog qhov kev pheej hmoo ntawm kev laus ntawm kev hloov pauv ntub dej - lub voj voog qhuav, ib hom kev ua haujlwm hauv batch ntau lawm thiab kev ua haujlwm tsis tu ncua.
Cov txheej txheem degradation pib los ntawm rov ua kom qhuav thiab rov ua dua tshiab. Thaum 316L cov cua sov tau raug rau lub sijhawm ziab kom qhuav tom qab ua haujlwm, cov yeeb yaj kiab ua kua seem evaporates sai heev, tawm hauv cov ntsev ntsev thiab corrosive ion residues ntawm cov hlau. Tom qab rov pib tsim khoom, cov txheej txheem tshiab tau ntxiv cov dej rov ua kom cov pob zeb muaj zog no, ua rau cov chaw siab ntev -corrosion micro-zones. Rov qab ntub dej- qhuav hloov tsis tu ncua ua rau cov chromium oxide passive zaj duab xis, ua rau tsis xwm yeem patchy pitting thiab nce phab ntsa thinning. Tsis zoo li ruaj khov submerged corrosion, qhov kev puas tsuaj cyclic accelerates aging ceev exponentially.
Qhov kev ua tsis tiav no tau nthuav dav hauv kev tsim khoom raws caij nyoog, kev ua tshuaj tsis tu ncua, thiab ntxuav lub tank cua sov. Ntau lub tuam txhab xav tias 316L qhov kev ua haujlwm ruaj khov hauv cov dej huv thiab tsis quav ntsej cov kev pheej hmoo zais thaum sawv ntsug kom qhuav. Kev puas tsuaj thaum ntxov tsuas qhia tau tias faint tsis sib npaug ntawm qhov chaw fogging yam tsis muaj qhov pom tseeb xeb lossis pits, uas yooj yim tsis quav ntsej hauv kev tshuaj xyuas niaj hnub. Nrog rau ntev - lub sij hawm tsub zuj zuj, lub zos pitting nkag mus rau hauv lub raj phab ntsa, ua rau kom sai li sai tau kua to thiab cov khoom burnout thaum lub sij hawm ntau lawm.
Kev tswj hwm kev ua haujlwm tau zoo tuaj yeem tiv thaiv cov ntub dej -qhuav cyclic corrosion. Zam kom tsis txhob ntev - lub sij hawm tsis ua hauj lwm kom qhuav tom qab batch ntau lawm thiab tuav cov kua immersion me ntsis los tiv thaiv cov seem seem. Ua raws li tsis tu ncua qis -kev ua kom muaj zog passivation kho kom kho cov yeeb yaj kiab tsis zoo. Optimize ntau lawm teem sij hawm kom txo tau nquag pib- nres hloov. Ua lub hom phiaj nrhiav kom pom qhov tuab ntawm cov raj sab saud uas ua rau muaj qhov ziab kom qhuav.
|
Cua sov hom |
Wet{0}}Dry Cycle Corrosion Risk |
Core Degradation Mechanism |
Thaum ntxov -theem Diagnostic Feature |
Qhov Tseem Ceeb Mitigation Engineering Measure |
|---|---|---|---|---|
|
316L Stainless hlau |
Siab |
Rov ua dua evaporation thiab rewetting concentrate nto ions, tsis tu ncua rhuav cov zaj duab xis passive thiab ua rau patchy pitting. |
Tsis sib luag nto fogging, hloov maj mam gloss attenuation yam tsis muaj qhov pom tseeb |
Tsis txhob ntev qhuav standby + tsis tu ncua passivation + optimized batch lag luam voj voog |
|
Titanium |
Nruab nrab |
Qhuav-kev hloov pauv ntub ua rau cov yeeb yaj kiab tsis sib xws tsis sib xws yam tsis muaj kev nkag mus sai sai |
Irregular faint discoloration ntawm lub raj sab sauv |
Kev tshem tawm cov dej ntws tawm raws sij hawm thiab kev kho cov yeeb yaj kiab ua ntu zus |
|
Fused Quartz |
Tsawg |
Ntsev residue crystallization thaum ziab ua rau me ntsis roughness, tsis muaj electrochemical puas |
Faint dawb crystal residue ntawm pob tshab nto |
Tshaj tawm -batch tu thiab kho qhov chaw polishing |
|
PFA-Jacketed |
Tsis tsim nyog |
Inert polymer resists ion concentration corrosion; Tsuas yog tshem tau residual crystallization tshwm sim |
Loose crystal deposits yooj yim los so huv |
Kev niaj hnub nto rinsing tom qab ntau lawm kaw |
Hauv cov ntsiab lus, alternating ntub - qhuav ncig yog ib qho tseem ceeb overlooked tsis ua hauj lwm qhov chaw rau 316L cua sov nyob rau hauv tsis tu ncua kev lag luam. Kev ua haujlwm ruaj khov hauv dej tsis tuaj yeem sawv cev rau cyclic qhuav - ntub dej hloov pauv. Optimized standby tswj thiab passivation tsis tu ncua yog qhov tseem ceeb rau txuas mus ntev - lub neej kev pab cuam.
