Stainless Hlau Hlau Mesh yog dav siv rau hla kev ua yeeb yam, tsim khoom siv, thiab khoom noj, huv si, thiab corrosion tsis kam. Txawm li cas los xij, tsis muaj tus hlau stainless yog tshem tawm kev ua kom corrosion- Zoo dua li yuav ua rau ib puag ncig chlorive, acids, humids, siab kub. Nkag siab yuav ua li cas stainless hlau hlau tus cwj pwm nyob rau hauv cov mob hnyav no yog qhov tseem ceeb rau kev xaiv lub neej raug, thiab tsim cov tswv yim saib xyuas tsim nyog.
Kab lus no muab ib qho hauv - qhov tob tob ntawm cov tshuab hluav taws xob, thiab cov lus pom zoo ua rau tiv thaiv kev ua tsis tiav kev ua tiav thaum ntxov.
Nkag siab corrosion tshuab hauv cov hlau stainless hlau mesh
Stainless hlau tiv thaiv corrosion feem ntau vim yog nws passive chromium oxide txheej tuaj yeem ua rau qee qhov kev ntxhov siab ib puag ncig. Ob peb corrosion mechanism tau tshwj xeeb rau cov mesh mesh.
Pitting corrosion - nyob rau hauv ib cheeb tsam kev puas tsuaj hauv chloride ib puag ncig
Pitting corrosion yog ib qho kev hem thawj loj tshaj plaws rau cov hlau tsis xeb hlau. Daim ntawv ntawm corrosion zoo li me me, qhov sib sib zog nqus uas nkag mus rau hauv cov hlau xaim, thaum kawg ua rau tsis ua haujlwm.
Vim li cas cov hlau ntxaij yog qhov yooj yim:
● Cov hlau ntxig hlau diameters nrawm rau nkag ib zaug ib daim ntawv aub
● Tshaj tawm cov ntsiab lus mesh tuaj yeem ntxiab chlorides
Bragnant ya raws sab hauv cov chaw pab pawg txhawb nqa cov chaw nres tsheb hauv zos
Ib puag ncig ib puag ncig qhov twg pitting tshwm sim:
● Marine cua tshuab (ntsev tsuag tsuag, seawater)
Cov pas dej ua luam dej nrog cov tshuaj tua kab mob chlorine
● Cov khoom noj {{0} Taug kev cuam tshuam nrog brine daws teeb meem
● Cov nroj tsuag tshuaj chev siv hydrochloric acid los yog chloride cov kuab tshuaj
Crevice corrosion - ib qho zais tab sis cov tsis muaj tseeb tsis ua tiav hom
Crevice corrosion loj hlob hauv cov cheeb tsam nrog kev txwv oxygen raug. Hlau Mesh muaj ntau cov ntuj ntoo ntawm kev sib tshuam, ua rau nws yooj yim dua li cov khoom siv hlau nplaum qub.
Raug cov chaw txawb chaw:
● Mesh {- dua - mesh mesh hu cov ntsiab lus
● Cov quav, nqaws, thiab sib tshooj
● Thaj chaw uas ntxaij nthe npo steel thaib lossis clamps
● Av {{{{}}}}} puent lossis biofouled khoob
Crevice corrosion feem ntau mus tsis tau paub txog kev puas siab txog kev puas siab tshwm sim vim lwm qhov chaw sab nraud kuj tseem tuaj yeem tshwm sim.
Kev ntxhov siab corrosion cracking (SCC) - qhov kev pheej hmoo nyob rau hauv high- kub chloride ib puag ncig
SCC sib txuas peb yam:
● Tensile txhawj xeeb
● CLORIDED IAS
● Kaum yim (siab dua 50℃/ 122 Qib F)
Hlau micres nyob rau hauv:
Boilers
● Distillation txhua
● Cov kev hloov pauv kub
● Cov khoom siv siv tshuaj lom neeg
yog qhov kev pheej hmoo loj. Cov ntaub qhwv zoo ib qho yog qhov tshwj xeeb yog vim muaj kev ntxhov siab siab yog thov thaum tab tom tab kaum thiab teeb tsa.
Alloy Kev Ua Tau Zoo Sib piv hauv Corrosive Cov Kev Mob
Sib txawv stainless hlau alloys ua kom muaj kev sib txawv ntawm kev coj tus cwj pwm sib txawv nyob ntawm lawv cov chromium, npib tsib xee, thiab molybdenum ntau.
Vim li cas 304 stCov hlau tsis zoo ua tsis zoo hauv Chlorides
304 Stainless hlau muaj qhov zoo dav corrosion tsis kam tab sis tsis muaj molybdenum. Yog tsis muaj mo, nws cov txheej passive tsis muaj zog tsis muaj zog sai heev hauv chlorides.
Raug swb:
● Reb xeb me ntsis hauv ntug hiav txwv ib puag ncig
Pitting ncig Welds
● Kev txhim khu hauv qab ntsev lim dej lim
304 Siv tau rau hauv ib puag ncig corrosive ib puag ncig tab sis tsis pom zoo rau siab -} chloride kis.
Vim li cas 316 thiab 316L muab kev tiv thaiv zoo dua
316 muaj 2-3% Molybdenum, tseem txhim kho tsis kam rau pitting thiab crevice corrosion.
Qhov zoo tshaj 304:
● Ntau dua qhov pitting tiv taus (pren nqi)
● Cov kev ua tau zoo nyob hauv Seasater
● Zoo tsis kam mus rau acidic thiab alkaline tu cov neeg sawv cev
● Txo cov pa roj hmab qis dua (316L) tiv thaiv weld corrosion
Corrosion Resistance sib piv
| Hlau | Pren tus nqi | Chloride tsis kam | Kev ntxhov siab corrosion tsis kam | Sau ntawv |
|---|---|---|---|---|
| 304 | 17–19 | Qi | Qi | Tsis haum rau ntug dej hiav txwv lossis tshuaj lom neeg |
| 316 | 23–28 | Siab | Nruab nrab-siab | Zoo heev rau cov tubrog nkoj thiab kev siv |
| 316L | 23–28 | Siab | Siab | Qhov zoo tshaj plaws rau kev siv vuam |
Duplex Stainless Hlau - -}} Kev xaiv kev xaiv
Cov qhab nia DuPlex (piv txwv li, 2205) tau ob npaug ntawm lub zog ntawm cov hlau Austenitic thiab kub siab rau chlorides vim yog cov ntsiab lus chromium ntau dua.
Muaj feem nyob rau hauv:
● Offshore platforms
● Desalination Nroj Tsuag
● Cov tshuaj txhuam tshuaj
Txawm li cas los xij, Ob Chav Hlau Hlau yog kim dua thiab nyuab rau Weave rau.
Cov teeb meem ib puag ncig uas ua kom nrawm corrosion
Hlau Mesh muaj kev paub ntau ntxiv mus ntau dua li cov ntawv hlau tawv, ua ib puag ncig tshwj xeeb tshaj yog kev cuam tshuam.
Chloride concentration thiab ntsev kis
Chlorides yog cov sawv cev tshaj plaws tiv thaiv cov hlau tsis muaj hlau.
Piv txwv ntawm chloride - rich nplua nuj:
Dej hiav txwv / txaws thaj chaw
Txoj kev noj qab zib
● Khoom Noj Khoom Haus
● Paj Ntaub Tshuaj Alixattures
Chloride ions nkag mus rau txheej passive, tsim cov pits uas loj hlob sai.
Qhov kub ntawm kev cuam tshuam ntawm cov neeg mob corrosion
Kub siab kub ua kom nrawm:
● SCC
Pitting
● General corrosion
Ntawm qhov kub siab tshaj 10 degree, txawm tias 316 stainless hlau tuaj yeem swb hauv cov chloride ib puag ncig.
Av noo, hws, thiab dej tsis zoo
Thaum noo noo tsis tau yaj, ua kom huv si corrosion accelerates.
- txoj kev pheej hmoo:
Mesh Tau nruab ze cov kav dej
● Cov chaw ua cua tsis zoo
● Kev tawm sab nraum zoov nrog kev ua kom muaj kev ua kom muaj hnub
Biofilm tsim los ntawm algae lossis cov kab mob ntxiv ntxiv nce cov nqi corresion.
Corrosion tus cwj pwm hauv cov ntawv thov kev nruj
Ib qho kev nkag siab tob yuav tsum tshuaj xyuas seb tus hlau hlau hlau coj li cas hauv - ntiaj teb cov xwm txheej.
Tubrog Nkoj thiab Nqaum Sib Tw
Kev sib xyaw ua ke ntawm cov tshuaj ntsev, noo noo noo noo, thiab UV hluav taws xob ua cov ntug dej hiav txwv ib puag ncig tsis tshua muaj hnyav tsis tshua muaj hnyav.
Cov khoom tsis txaus:
Pitting ntawm Woven kev sib tshuam
Interic Plum Rau (Tshuaj yej Staining)
● Crevice corrosion qab mounting clips
316 thiab cov qhab nia zoo nkauj tau pom zoo.
Tshuaj lom neeg thiab petrochemical ua
Hlau Mesh feem ntau siv rau:
● CATALANTHST Support Screens
● Demisters
● Cov tais diav rawg
Ficts Zaub mov
Cov tshuaj lom xws li HCL, HSso₄, Naoh, thiab cov kuab tshuaj tuaj yeem nkag mus rau cov txheej passive.
Kev xaiv cov khoom yuav tsum phim cov tshuaj lom neeg thiab qhov kub thiab txias.
Khoom Noj thiab Khoom Noj
Txawm hais tias cov lag luam no tsis tshua muaj kev txhoj puab heev, lawv muaj:
● Acidic Cov Khoom Noj Khoom Noj
● Cov ntsiab lus ntsev
● Cov xab npum alkaline
● Cov dej dej kub
● Chav dej
316l yog qhov zoo dua rau ob qho tib si corrosion tsis kam thiab tu cev.
Tshuaj xyuas, saib xyuas, thiab cov qauv kuaj
Cov khoom siv thaum ntxov tiv thaiv cov khoom siv muaj nqi tsis ua haujlwm.
Pom thiab kuaj xyuas lub ntsej muag
Kev tshuaj xyuas ib txwm yuav tsum saib xyuas:
● Micro - pits
Placoloration
● Weld Deterioration
● Mesh Theb
● Rebust hais
Cov me me pab txheeb xyuas cov theem thaum muaj kev ua tiav ua ntej cov qauv tsis ua haujlwm.
Tshuaj Ntsuam Xyuas thiab Tshuaj Caj Npoo
Kev kuaj pom tuaj yeem kuaj cov tshuaj tsw qab.
Cov cuab yeej ntsuas:
Ferric chloride pitting
● Kev kuaj qab ntsev (huab)
● CLORIDE ION TES TESCE
Cov hau kev no pab ntsuas kev ua kom haum ib puag ncig thiab cov khoom siv khoom siv.
Kev Ntsuas Mechanical
Lub zog tensile thiab kev sim ua kom pom kev nyuaj tawv txheeb xyuas qhov tsis muaj zog vim kev xeb.
Hlau hlau uas loses Hla - ntu tuab yuav dhau mus rau:
● Tearing
● Deformation
● Kev ua tsis tiav
Kev tiv thaiv kab mob strategies kom txo kev ua kom muaj kev puas tsuaj
Kev xaiv cov khoom tsuas yog thawj kauj ruam - Kev tiv thaiv cov tswv yim zoo tshaj plaws mesh lub neej.
Cov kev kho deg thiab tiv thaiv cov txheej txheem tiv thaiv
Ntau yam kev kho mob txhim kho corrosion tsis kam:
11 Electropolishing
● Passivation
● Epoxy Txheej Txheem
● PTFE (Teflon) Txheej
Kev siv tshuab hluav taws xob yog siv tau vim tias nws smooths micro - crevices qhov chaw pib.
Kev Tu Kom Zoo thiab Tu Kev Ua Haujlwm
Txhawm rau tiv thaiv pitting thiab crevice corrosion:
● Yauhse mesh exposed rau ntsev
● Zam kev chloride -} raws li xabffents
● Cov av tsis tu ncua thiab tso nyiaj
● Thaj chaw qhuav mus txog noo noo khaws
Cov tshuaj tsis huv yuav rhuav tshem cov txheej passive.
Cov tswv yim tsim kom txo qis kev tsim cov cees
Cov qauv tsim zoo dua txo cov kev pheej hmoo corrosion:
● Tshem tawm cov kev sib tshooj tsis tseem ceeb
● Xyuas kom pom kev ua kom txaus thiab ua kom dim pa
● Tsis txhob nruj, noo - scapping pob qij tw
● Xaiv welded mesh tshaj woven mesh thaum crevices yuav tsum muaj tsawg
Xaiv txoj cai mesh rau kev sib cav sib ceg
Lub hom phiaj tsis yog tsuas yog tiv thaiv corrosion tiv thaiv tab sis kuj tseem ua kom ntev - lub sij hawm thiab siv ua haujlwm.
Cov Khoom Siv Xaiv Matrix
Pom zoo alloys los ntawm ib puag ncig
| Huab cua | Pom zoo Alloy | Sau ntawv |
|---|---|---|
| Tus sawv cev ua tub rog | 316 / Duplex | Qhov Phaj Zoo Tshaj |
| Kev Lag Luam | 316L / Duplex / Super Duplex | Nyob ntawm cov kua qaub / alkali concentration |
| Kev Ua Noj | 316L | Huv huv, yooj yim los ntxuav |
| Qhov Kub Siab | 310 / 316 | Kuaj cov chloride qib |
| Kev siv nyob sab hauv tsev | 304 | Nqi -}}}} |
Mesh hom thiab weave txiav txim siab
Txhoj puab ib txwm yuav tsum muaj:
● Cov khaub ncaws hnav kom txo cov khib nyiab
● Welded Mesh rau cov qauv hluav taws xob
● Lub taub hnyav hlau hnyav dua rau lub neej pabcuam ntev
Ntsuas tus nqi vs. corrosion tsis kam
Thaum siab -} cov hlau roj alleoy ntau dua upfront, nws txo qis:
● Hloov cov zaus hloov
● Downtime
● Kev phom sij
Incove Kev Nyab Xeeb Khoom Nyab Xeeb
Lub ntev - Tod Cov nqi tau txais txiaj ntsig ntau zaus feem ntau outweigh thawj zaug kev nqis peev xub thawj.
Tag
Stainless Hlau Hlau Mesh muab kev ua tau zoo nyob rau kev ua tau zoo thoob plaws kev lag luam, tab sis kev sib tw ib puag ncig qhia cov kev sib tw corrosion uas yuav tsum tau ua tib zoo tswj hwm. Los ntawm kev nkag siab corrosion mechanisms, xaiv tsim nyog alloys, tsim kev tsim kho, cov neeg siv tau txuas ntxiv rau lub neej ntawm lawv cov mesh mesh. Txawm hais tias siv hauv marine ib puag ncig, kev ua noj ua haus, kev tsim khoom siv, lossis kev xaiv siab thiab kev xaiv kom muaj kev tsim nyog thiab ntev} lub sij hawm.