Cov tsos ntawm xeb los yog pitting ntawm qhov chaw stainless hlau feem ntau txuas rau qhov kev ua tsis taus ntawm nws corrosion tsis kam. Txawm hais tias Stainless hlau cov ntaub ntawv ib qho yeeb yaj kiab dight (passivation zaj duab xis) Vim yog cov txheej txheem chromium, ua rau cov hlau matrix rau corrosion. Hauv qab no muaj cov lus qhia ntxaws ntxaws ntawm cov laj thawj thiab txoj kev tu niaj hnub:
1. Cov laj thawj ua rau xeb lossis pitting ntawm stainless hlau chaw
Corrosive Media nyob rau hauv ib puag ncig
Chloride ion (clj) yaig: Chloride ions hauv hiav txwv, ntsev tsuag, muaj dej paug, lossis chlorine-muaj cov yeeb yaj kiab passive, ua rau pitter (hauv zos me me-qhov corrosion). Cov khoom siv hauv cov ntug dej hiav txwv lossis tshuaj siv tshuaj lom neeg tshwj xeeb.
Acidic lossis alkaline tshuaj: Ntev nthuav tawm rau cov muaj zog acids muaj zog (xws li hydrochloric acid) lossis muaj zog alkalis) corrodes cov zaj duab xis passivation passive zaj duab xis, ua rau muaj kev sib tw lossis cov pittingcompital.
Kev kub-kub, cov huab cua siab-noo noo: Vaum nrawm nrawm txhim kho electrochemion, tshwj xeeb tshaj yog thaum cov yeeb yaj kiab dej los yog dej ua yeeb yaj kiab rau saum npoo av, tsim cov roj teeb micro-roj teeb.
Nto Kho Mob
Vuam tsis xws luag: Yog tias kev tiv thaiv argon tsis txaus ntseeg thaum lub teb chaws purble lossis tom qab siv thaj chaw lossis thaj chaw chromium-depreted lossis thaj chaw reldeted, muab rau thaj chaw phab ntsa, ua haujlwm li cov chaw hauv cheeb tsam.
NEEG KHO TSHUAB: Khawb, kev cuam tshuam, lossis kev sib txhuam tuaj yeem ua rau cov neeg ua yeeb yaj kiab passive, ua rau cov hlau pib ua kom nrawm nrawm nrawm.
Nto roughness: Cov chaw nres lossis ntxhib ntxig cuab ntxiab av thiab noo noo, exacerbating nyob rau hauv corrosion.
Kev siv tsis raug thiab txij nkawm
Cov neeg sawv cev tsis raug: Siv chlorine-raws lossis muaj zog acidic \/ alkaline cov tshuaj ntxuav corrodes storten stainless hlau qhov chaw.
Ntev lub sij hawm tsub zuj zuj ntawm dej lossis av: Residate noo noo, cov zaub mov seem, lossis tshuaj lom neeg tsim kom muaj cov microenviron corrosive rau lossis sab hauv cov cuab yeej.
Tsis muaj kev tu ib txwm: Cov yeeb yaj kiab passivation yuav txwv tsis dhau sijhawm. Yog tsis muaj sijhawm kho kom haum, kev pheej hmoo corrosion nce siab heev.
Cov khoom siv ntsig txog teeb meem
Kev xaiv cov khoom tsis raug: Tsawg-qib stainless hlau (piv txwv li, 201, 202) muaj cov ntsiab lus tsis muaj hnub nyoog thiab tsis zoo ua rau muaj xeb, ua rau muaj kev xeb hauv qee qhov chaw.
Cov ntaub ntawv cuav lossis cov ntaub ntawv: Quality Stainless hlau uas tsis yog-raws li cov qauv tsis ua kom tau raws corrosion tiv taus cov qauv.
2. Cov hau kev niaj hnub rau stainless hlau sib xyaw tso tsheb hlau luam
Tu tas li thiab ziab
Tiab: Ntxuav tsawg kawg ib zaug ib zaug ib asthiv, nyob ntawm kev siv cov kev cai, kom tiv thaiv cov av tsim.
Tu txoj kev:
Siv ntaub so ib qho (piv txwv li, xab npus) thiab ntaub mos muag. Zam kev sib txhuam hlau lossis cov txhuam hniav.
Rau stubborn stains, siv dilutuic nitric acid (1-5%) lossis tus tshwj xeeb stainless hlau nqus tsev vacuum, ua raws los ntawm kev yaug nrog dej huv thiab ziab.
Kom qhuav: Tom qab tu, so lub saum npoo qhuav nrog daim ntaub lossis siv cov huab cua kub kom tiv thaiv cov dej stains.
Zam kev corrosive cov tshuaj
Coolate corrosive media: Rau cov tso tsheb hlau luam tuav chlorine-muaj lossis kua qaub-cov tshuaj, siv cov ntaub ntawv uas xeb zoo li 316L stainless hlau thiab tsis tu ncua ntsaws ruaj ruaj.
Sai Tiab: Yog tias muaj dej xau tau tshwm sim, nres cov haujlwm tam sim ntawd thiab ua kom huv si cov seem kom tiv thaiv corrosion kis.
Deg Kho Thiab Passivation
Me kos duab kho: Sand raws cov nplej nrog 600 - {1} grit sandpaper, tshem tawm burrs, thiab siv burrs, thiab siv burrs, thiab siv burrs, thiab siv cov hlau hla dhau los ua cov yeeb yaj kiab.
Tom qab Weld Passivation: Tom qab vuam, ua kev ua si \/ xws li, siv nitric acid-hydrofluoric acid sib tov) tshem tawm cov nplai thiab chromium-depleted txheej.
Lub sij hawm ua haujlwm passivation: Kev ua cov kev ua haujlwm txhua xyoo 1-2 xyoo kom txhim kho corrosion tsis kam.
Kev tswj hwm ib puag ncig
Qhov cua thiab cov av noo tswj: Tswj ib qho chaw muaj cua zoo nrog cov av noo hauv qab 60%.
Kev Tiv Thaiv Hmoov Hmoov: Siv plua plav npog los tiv thaiv cov khoom siv los ntawm kev sib kis.
Kev tshuaj xyuas thiab cov ntaub ntawv
Kev Saib Xyuas Kev Pom: Txheeb xyuas txhua hli rau xeb, pitting, lossis discoloration, tsom mus rau Welds, nqaws, thiab thaj chaw tso dej.
Thickness ntsuas: Siv daim ntawv ultrasonic tuab ultrasonic tuab siv tau txhua xyoo los ntsuas cov qib corrosion.
Cov Ntaub Ntawv Txij Nkawm: Khaws cov ncauj lus kom ntxaws ntawm kev ntxuav, tshuaj xyuas, thiab kho rau cov traceability.
3. Cov lus pom zoo ntawm cov lus qhia tshwj xeeb rau cov xwm txheej tshwj xeeb
Kev Lag Luam Khoom Noj: Ua raws li FDA lossis GB 4806.9 Kev nyiam huv. Ua kev kuaj mob microbial tom qab tu kom tsis txhob muaj kev sib kis.
Tshuaj Kev Lag Luam: Nquag Saib Xyuas Lub Tank Nruab Nrab Ph nruab nrab thiab chloride ion qib. Hloov lossis ntxuav lub nruab nrab tam sim ntawd yog qhov pib tau dhau lawm.
Thaj chaw ntug hiav txwv: Siv cov tshuaj tiv thaiv xeb (piv txwv li, epoxy cob) lossis siv Duplex stainless hlau (piv txwv li 2205) txhawm rau txhim kho corrosion tsis kam.
Tiv Tauj Peb
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