Yuav ua li cas paub qhov txawv ntawm ntuj passivation zaj duab xis los ntawm cov yeeb yaj kiab puas ntawm 316 stainless hlau raj

Yuav ua li cas sib txawv ntawm ib tug natural passivation zaj duab xis thiab ib tug puas zaj duab xis ntawm 316 stainless hlau raj Cov tub ntxhais tiv thaiv -corrosion barrier rau fermentation cua sov loops yog ib tug nyias, natural chromium{2}} nplua nuj passivation zaj duab xis uas yog tsim los ntawm 316 stainless hlau thaum sib cuag nrog oxygen. Cov qauv zaj duab xis no yuav raug rhuav tshem los ntawm qhov ntev - lub sij hawm siab - kub alkali ntxuav, chloride yaig, thiab particle abrasion. Txhawm rau tiv thaiv weld pitting leakage thiab teeb tsa kev saib xyuas kev ua haujlwm ua ntej, cov neeg ua haujlwm xav tau cov qauv sib txawv meej los ntsuas kev noj qab haus huv ntawm cov yeeb yaj kiab thaum saib xyuas txhua hnub. Kev pom, kev sim, thiab kev ua haujlwm txawv qhov ntsuas tau raug teeb tsa hauv cov lus hauv qab no.|Lub xeev zaj duab xis|Nto Visual Feature|Ultrasonic & Electrochemical Test Cov ntaub ntawv|Corrosion Resistance Performance|Cov Lus Qhia Txog Kev Kho Kom Zoo|| ----|----|----|----|----|| Ua kom tiav ntuj passivation zaj duab xis|Uniform silver metallic luster, tsis muaj discoloration, du weld nto|Tus nqi ruaj khov, phab ntsa tuab tsis hloov pauv rau ntau qhov kev tshuaj xyuas|Tiv thaiv chloride hauv qab 50ppm stably|Kev tshuaj xyuas peb lub hlis twg ib txwm nkaus xwb|| Me ntsis puas ib nrab zaj duab xis|Lub teeb daj stains concentrated ntawm welds thiab luj tshib|Me me muaj peev xwm hloov tau, lub zos nyias zaj duab xis kuaj pom|Risk ntawm micro-pits nyob rau hauv tas li alkali mus|Teem offline passivation hauv 3 lub hlis|| Kev puas tsuaj loj heev fragmented zaj duab xis|Pom tseeb xim av xeb me ntsis, strip-zoo li tus abrasion marks|Nruam tsis tshua muaj peev xwm, phab ntsa thickness txo lub hli los ntawm lub hli|Rapid pitting expansion nyob rau hauv nruab nrab ncig|Nres ntau lawm rau tam sim pickling passivation|| Siab plam tiv thaiv zaj duab xis|Nthuav xeb pawg, nthuav tawm tsaus nti ntxhib hlau matrix|Tsis tshua muaj peev xwm, pom tseeb thinning ntawm welds|Los ntawm-phab ntsa leakage txaus ntshai nyob rau hauv 1-2 ntau lawm voj voog|Hloov raj pob yog tias passivation tsis tuaj yeem kho qhov tob tob|Lub ntuj passivation zaj duab xis ntawm tsim nyog 316 stainless hlau yog tsim spontaneously thaum cov hlau tshiab hu rau huab cua los yog oxygen-muaj dej tu. Nws nthuav tawm ib homogeneous mos nyiaj gloss yam tsis muaj xim txawv, thiab cov haujlwm vuam muaj qhov zoo sib xws ntawm kev ntxhib los mos tom qab polishing txheej txheem. Nyob rau hauv cov txheej txheem kev khiav hauj lwm, zaj duab xis no muaj peev xwm tiv thaiv chloride ion infiltration vim nws cov qauv compact thiab nruam molecular. Qhov saum npoo tsuas yog khaws cov xim xim hlau uas tsis muaj blemishes yog tias cov yeeb yaj kiab tseem tsis zoo, txawm tias tom qab CIP mus ntev. Thawj qhov taw qhia ntawm cov yeeb yaj kiab passivation degradation yog qhov sib txuam ntawm lub teeb daj daj ntawm cov kav dej thiab cov welds. Cov cheeb tsam no yuav raug cuam tshuam rau qhov hnyav tshaj plaws thiab qhov kub thiab txias, vim tias cov yeeb yaj kiab tiv thaiv yog qhov nqaim tshaj plaws. Tom qab ib nrab zaj duab xis decomposition, cov khoom daj yog xoob chromium oxide residue uas tsis muaj peev xwm los thaiv cov ions zoo. Txoj kev vam khom tshaj plaws ntawm kev sib txawv yog kev kuaj electrochemical. Intact natural film tswj kev ntsuas siab zoo ib yam, thaum qhov chaw puas muaj qhov sib txawv ntawm qhov qis qis. Pom pom xim av xeb yuav tshwm sim los ntawm kev puas tsuaj rau zaj duab xis loj. Thaum lub sij hawm no, lub chromium-nplua nuj barrier tau disintegrated nyob rau hauv ib tug tseem ceeb feem, cia cov liab qab hlau mus ncaj qha mus rau lub conductive nruab nrab thiab tsim kom muaj zog corrosion hlwb. Kev txo qis hauv cov tuab ntawm qhov chaw tsis muaj xim tuaj yeem raug ntes los ntawm ultrasonic phab ntsa thickness scanning, uas qhia tias micro-pits tau pib tsim thiab nthuav sab hauv. Kev tshem tawm cov pits zais hauv qab cov kab xeb tsis tuaj yeem ua tau los ntawm kev so yooj yim; tsuas yog offline pickling passivation tuaj yeem tshem tawm cov kab mob thiab rov tsim dua tshiab, tag nrho cov yeeb yaj kiab tiv thaiv. Dense rust clusters envelop the tube wall if maintenance is postponed until the film is entirely lost. Nyob rau lub sijhawm no, cov vuam tau raug rau qhov sib sib zog nqus, tsis tuaj yeem hloov pauv, thiab cov phab ntsa nyias nyias tuaj yeem kho tau los ntawm kev ua kom qeeb corrosion los ntawm kev kho dua passivation. Lub raj ntim tau raug cuam tshuam sai sai rau txhua lub sijhawm thaum lub xeev no ua tiav, ua rau tsis muaj kev cia siab kaw thiab fermentation nruab nrab pov tseg. Cov neeg ua haujlwm tsim khoom siv qhov kev ntsuam xyuas dav dav ntawm cov yeeb yaj kiab zoo los ntawm kev sib koom ua ke ntawm peb lub hlis twg electrochemical muaj peev xwm tshawb pom nrog kev pom kev pom thaum lub sijhawm ua haujlwm saib xyuas rau kev tswj hwm txhua hnub ntawm qhov chaw. Yog tias pom muaj xim daj daj, lub voj voog tshuaj xyuas yuav tsum luv luv, thiab cov phiaj xwm kev saib xyuas passivation yuav tsum tau tsim. Txhawm rau tiv thaiv cov yeeb yaj kiab zoo nkauj ntawm 316 stainless hlau raj thiab txuas ntxiv lub neej kev pab cuam ntawm cov cuab yeej cua sov, nws yog ib qho tseem ceeb kom tswj hwm cov alkali ntxuav kub hauv qab 60 degree, nruab cov lim pem hauv ntej kom txo cov khoom ua kom puas, thiab xyuas kom meej tias muaj cov pa oxygen txaus tom qab txhua lub voj voog CIP.