Stainless hlau yog dav muaj nuj nqis rau nws cov kev tiv thaiv corrosion thiab nws huv si, niaj hnub zoo li. Tab sis txawm tias cov khoom siv ruaj khov no tau txais txiaj ntsig los ntawm kev kho mob ntxiv los txhim kho nws cov kev tiv thaiv corrosion - txheej txheem hu uapassivation. Cov tshuaj kho mob no ua lub luag haujlwm tseem ceeb hauv kev ua kom lub neej ntev thiab kev ua haujlwm ntawm cov hlau tsis huv thoob plaws kev lag luam.
Hauv tsab xov xwm no, peb piav qhia txog qhov passivation yog dab tsi, nws ua haujlwm li cas, vim li cas nws tseem ceeb, thiab qhov twg nws feem ntau siv. Raws li ib tug ua stainless steel tsum,sakysteel uamuab ob qho tib si passivated thiab tsis-passivated stainless hlau cov khoom tsim kom tau raws li cov qauv thoob ntiaj teb.
Passivation yog dab tsi
Passivation yog cov txheej txheem tshuaj uas tshem tawm cov hlau dawb thiab lwm yam kab mob ntawm cov hlau tsis huv. Tom qab ntxuav, cov hlau yog kho nrog me ntsis oxidant, feem ntau yog nitric acid los yog citric acid, los txhawb kev tsim ntawm nyias, pob tshab oxide txheej ntawm qhov chaw.
Cov txheej tiv thaiv no ua rau cov hlau tsis kam tiv thaiv xeb thiab xeb los ntawm kev tiv thaiv cov chaw ua haujlwm uas ua rau muaj tshuaj lom neeg nrog rau ib puag ncig.
Passivation tsis yog txheej txheej lossis plating. Hloov chaw, nws txhim kho cov hlau tsis muaj steel lub ntuj tiv thaiv los ntawm kev tso cai rau nws cov ntsiab lus chromium los tsim cov txheej txheem oxide ruaj khov.
Yuav Ua Li Cas Passivation Ua Haujlwm
Cov txheej txheem feem ntau muaj peb kauj ruam tseem ceeb:
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Ntxuav
Tag nrho cov roj, roj, thiab cov khib nyiab yuav tsum tau muab tshem tawm siv alkaline los yog cov kuab tshuaj ntxuav tes. Qhov no ua kom cov kua qaub da dej tuaj yeem tiv tauj cov hlau liab qab. -
Acid da dej kho mob
Tom qab ntawd cov hlau tsis huv yog muab tso rau hauv cov kua qaub passivating, xws li nitric lossis citric acid. Qhov no tshem tawm cov hlau saum npoo thiab ua rau tsim cov txheej txheem chromium oxide passive. -
Rinsing thiab ziab
Tom qab cov kua qaub da dej, cov khoom siv tau muab yaug nrog dej deionized thiab qhuav. Qhov no ua kom tsis muaj cov kua qaub lossis cov kab mob sib kis nyob ntawm qhov chaw.
Qhov tshwm sim yog tus du, chemically ruaj khov nto uas tiv thaiv corrosion txawm nyob rau hauv ib puag ncig hnyav.
Vim li cas Passivation tseem ceeb
Txawm hais tias stainless hlau muaj chromium thiab twb muaj corrosion resistant, mechanical processing xws li txiav, vuam, los yog machining tuaj yeem qhia cov hlau dawb rau saum npoo. Cov khoom hlau no tuaj yeem ua rau muaj kev cuam tshuam hauv cheeb tsam yog tias tsis tshem tawm.
Passivation restores kev ncaj ncees ntawm cov hlau nto los ntawm:
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Tshem tawm cov kab mob
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Txhim khu kev tiv thaiv corrosion
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Txhim kho durability nyob rau hauv ib puag ncig txhoj puab heev
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Txhawb nqa chav huv thiab huv huv
Rau kev lag luam xws li kev ua zaub mov, tshuaj, thiab aerospace, passivation tsis yog pom zoo - nws yog feem ntau yuav tsum tau.
Common Applications ntawm Passivated Stainless hlau
Passivation yog dav siv nyob rau hauv cov sectors uas xav tau mus ntev corrosion kuj thiab huv. Qee qhov piv txwv suav nrog:
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Khoom noj khoom haus thiab dej haus ua khoom siv
Txhawm rau tiv thaiv kev kis kab mob thiab kab mob loj hlob hauv cov chaw huv huv. -
Pharmaceutical thiab Medical Devices
Cov cuab yeej thiab cov khoom siv phais yuav tsum tsis muaj tshuaj tiv thaiv thiab tsis muaj xeb. -
Kev lag luam roj thiab roj
Txhawm rau kom ntev lub neej ntawm cov khoom raug tshuaj lom neeg, dej ntsev, lossis cov av noo siab. -
Semiconductor Manufacturing
Ultra-ntxuav qhov chaw txo cov kab mob sib kis hauv qhov chaw tseem ceeb.
sakysteel uamuab cov ntaub ntawv tsis muaj zog stainless hlau uas ua tau raws li ASTM A967 thiab lwm cov qauv thoob ntiaj teb, txhawb cov neeg siv khoom thoob plaws cov kev lag luam uas xav tau.
Standards thiab Specifications
Cov txheej txheem passivation yog tswj hwm los ntawm ntau tus qauv thoob ntiaj teb uas qhia txog cov kev coj ua zoo tshaj plaws, kev sim, thiab kev siv tshuaj lom neeg. Cov no suav nrog:
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ASTM A967: Txuj kev qhia tshwj xeeb rau kev kho tshuaj passivation rau stainless hlau qhov chaw
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ASTM A380 Cov Lus Qhia rau kev ntxuav, tshem tawm, thiab ua kom tsis muaj zog
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ISO 16048: International passivation tus qauv
Cov qauv no ua kom cov txheej txheem ua tiav kom raug thiab qhov kawg saum npoo ua tau raws li qhov xav tau kev tiv thaiv corrosion.
Yuav Qhia Li Cas Yog Stainless Hlau Passivated
Passivated stainless hlau tsis zoo heev txawv rau qhov muag liab qab. Txawm li cas los xij, kev ntsuam xyuas tshwj xeeb xws li kev sim tooj liab sulfate, qhov ntsuas kub ntawm cov av noo, lossis kev kuaj ntsev ntsev tuaj yeem txheeb xyuas yog tias cov txheej txheem dhau los thiab muaj txiaj ntsig.
Qee qhov kev lag luam xav tau cov ntaub ntawv pov thawj rau passivation.sakysteel uamuab tag nrho cov ntaub ntawv thiab cov ntawv xeem rau cov khoom passivated thaum thov.
Cov txiaj ntsig ntawm Passivation
Txhawm rau xaus, cov txiaj ntsig tseem ceeb ntawm stainless hlau passivation suav nrog:
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Txhim khu kev tiv thaiv rau pitting thiab xeb
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Lub neej ua haujlwm ntev dua rau cov khoom siv
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Cleaner thiab huv si ntau dua
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Txhim kho kev ua tau zoo nyob rau hauv ib puag ncig tshuaj lom neeg los yog saline
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Ua raws li cov qauv kev lag luam thoob ntiaj teb
Los ntawm kev nqis peev hauv cov ntaub ntawv passivated, cov lag luam txo cov nqi kho, txhim kho kev nyab xeeb, thiab txuas ntxiv kev ntseeg tau ntawm cov cuab yeej siv.
Xaus
Passivation yog txheej txheem tseem ceeb hauv kev kho cov hlau tsis huv, tshwj xeeb tshaj yog rau cov ntawv thov uas muaj kev tiv thaiv corrosion thiab kev huv yog qhov tseem ceeb. Los ntawm kev tshem tawm cov kab mob saum npoo av thiab txhim kho cov txheej txheem oxide tiv thaiv, cov txheej txheem no tso cai rau cov hlau tsis muaj steel ua qhov zoo tshaj plaws.
Txawm hais tias koj xav tau cov kav dej passivated, fittings, tso tsheb hlau luam, lossis cov khoom siv kev cai,sakysteel uatuaj yeem muab cov kev daws teeb meem uas ua tau raws li koj cov lus qhia meej thiab kev ua raws li kev lag luam. Hu rau peb pab neeg kom paub ntau ntxiv txog peb cov kev pabcuam stainless hlau thiab peb tuaj yeem pab txhim kho koj qhov project tom ntej.
Post lub sij hawm: Jun-23-2025