316L stainless hlau immersion rhaub yog dav siv nyob rau hauv tas li circulating dej kub loops rau industrial tu thiab kub tswj. Silicate compounds feem ntau tshwm sim raws li cov kab tsis huv hauv cov dej nyoos. Nyob rau hauv cov cua kub ruaj khov, silicate maj mam precipitates thiab cov ntaub ntawv nyuaj adherent nplai rau ntawm lub tshuab cua sov. Cov txheej txheem nruj tsim cov txheej txheem sib khi ntawm cov nplai thiab cov hlau sheath. Corrosive ions mloog zoo nyob rau hauv cov chaw kaw, ua rau undercut crevice corrosion uas propagates hauv qab lub teev yam tsis pom kev ceeb toom saum npoo.
Silicate scale ntsig txog corrosion tsim nyob rau hauv ntau theem ua ntu zus. Cov cua kub tsis tu ncua txo cov silicate solubility, txhawb nqa cov nplais khov. Thaum cov nplai tsim cov ntaub thaiv npog, cov dej sib pauv ntawm cov crevice sab hauv thiab cov tshuaj ntau lawm nres. Cov pa oxygen hauv qhov crevice tau noj sai heev, tsim kom muaj kev kub ntxhov hauv cheeb tsam tshuaj lom neeg. Chloride thiab acidic byproducts accumulates tsis tu ncua, rhuav tshem cov passive chromium oxide zaj duab xis thiab corroding cov hlau substrate los ntawm hauv qab lub teev.
Qhov no zais undercut corrosion coj hnyav ua haujlwm txaus ntshai. Cov tawv silicate crust npog cov pits corrosion tag, yog li niaj hnub kev kuaj pom tsis tuaj yeem kuaj xyuas cov hlau poob. Cov neeg ua haujlwm feem ntau txiav txim rau cov khoom siv kom noj qab haus huv tsuas yog raws li qhov tsis zoo sab nrauv. Raws li corrosion nkag mus rau hauv lub raj phab ntsa, sudden to tshwm sim thaum lub sij hawm ntau lawm khiav. Ntau pab pawg saib xyuas tsuas yog tshem tawm cov nplai me me yam tsis tau hais txog cov tshuaj lom neeg ua kom zoo dua qub, ua rau rov ua dua lub rhaub ua ntej ntxov.
Kev kho dej tsis tu ncua thiab teem caij descaling tuaj yeem txo qhov degradation. Siv dej softening thiab impurity pom kom txo cov ntsiab lus silicate. Ua raws sij hawm tshuaj descaling kom tshem tawm cov compact silicate deposits es tsis txhob ntawm mechanical scraping. Kho kev khiav hauj lwm lub zog ceev kom tsis txhob muaj qhov kub thiab txias heev uas ua rau cov nag lossis daus silicate. Ua ultrasonic thickness kuaj nyob rau hauv scaled cheeb tsam rau ntev - cov khoom siv khiav.
Rhaub Hom Silicate Scale Crevice Undercut Corrosion Risk Core Degradation Mechanism Thaum Ntxov -theem Diagnostic Feature Key Mitigation Engineering Measure
316L Stainless hlau High Hard silicate deposits daim ntawv kaw crevices; ion concentration rhuav tshem cov zaj duab xis passive thiab induces subsurface undercut corrosion ua kom tiav cov txheej txheem nruj; tsis pom corrosion cim externally Raw dej impurity tswj + tsis tu ncua tag nrho descaling + zog ceev optimization
Titanium Medium Silicate nplai kuj tsim cov cheeb tsam crevice, tsis tau titanium passive zaj duab xis qhia tau hais tias muaj zog tiv thaiv rau cov concentrated ions Uniform nyuaj nplai, qee zaus cov pits me me tom qab tshem tawm cov txheej txheem descaling thiab tshuaj xyuas hauv zos.
Fused Quartz Tsawg Silicate adheres lub cev tsis muaj electrochemical corrosion; Cov nplai tuab ua rau thermal overloading Opaque dawb nplai zaj duab xis ntawm pob tshab raj Cov kua qaub tu kom yaj silicate deposits
PFA-Jacketed Negligible Non-conductive polymer tiv thaiv crevice electrochemical nres; scale tsuas yog txo cov hluav taws xob hloov hluav taws xob tshem tawm cov nplai txuas nrog lub tsho sab nrauv du Lub sijhawm tu kom rov ua haujlwm thermal
Txhawm rau xaus, silicate nag lossis daus hauv cov dej kub uas tsim kev zais tsis pub muaj kev cuam tshuam rau 316L immersion heaters. Qhov loj me ntawm qhov chaw tsis tuaj yeem lav qhov kev ncaj ncees ntawm cov hlau. Kev tswj tsis tu ncua tsis tu ncua thiab cov txheej txheem descaling kom zoo yog qhov tseem ceeb rau kev ua haujlwm ntev.
