Huab cua steel, raws li qhov nyiam corrosion- cov khoom siv tiv thaiv rau kev siv sab nraum zoov, tau ntev ntev yog ib qho kev txhawj xeeb tseem ceeb rau cov kws tsim khoom, cov kws tshaj lij, thiab cov kws tsim qauv tsim txog nws lub neej kev pab sab nraum zoov. Lub neej ntawm huab cua steel tsis yog tus nqi ruaj khov; Nws yog cuam tshuam los ntawm ntau yam xws li kev siv ib puag ncig, qib khoom siv, phaj thickness, fabrication thiab installation txoj kev, thiab kev saib xyuas.
Standard Range of Outdoor Service Life for Weathering Steel
Raws li kev lag luam kev coj ua thiab cov ntaub ntawv tus qauv, qhov tseem ceeb ntawm kev pabcuam sab nraum zoov rau huab cua steel tuaj yeem muab faib ua peb theem.
Standard Environments (Purban, Rural)
Kev pab lub neej ntawm 20-35 xyoo. Qhov no sawv cev rau cov ntawv thov ntau tshaj plaws, tsim nyog rau cov xwm txheej xws li hauv nroog lub tsev facades, kev loj guardrails, chaw ua si thaj chaw, thiab kev txhawb nqa sab nraum zoov. Nws kuj tseem ua tus qauv siv rau ntau qhov kev xaiv qhov project. Txhua xyoo corrosion tus nqi ntawm weathering steel yog tswj ntawm 0.02-0.04mm, muab 2-5 npaug ntawm sab nraum zoov lifespan ntawm cov pa roj carbon zoo tib yam.
Harsh Environments (Marine, Industrial)
Kev pab lub neej ntawm 10-30 xyoo. Haum rau cov ntug hiav txwv txuas hniav, seaport terminals, chemical industrial parks, boiler chimneys, thiab cov xwm txheej zoo sib xws. Cov cheeb tsam no muaj cov xov xwm corrosive heev xws li ntsev tsuag thiab kua qaub gases, ua kom cov xeb txheej degradation. Kev pab cuam lub neej ntev yuav tsum xaiv cov qib hwm, siv cov txheej txheem tiv thaiv, lossis siv kev saib xyuas tsis tu ncua.
Ib puag ncig zoo tagnrho (qhuav, qis-Corrosion Settings)
Kev pab lub neej ntawm 30-50 xyoo, nrog cov qib hwm tshaj 50 xyoo. Qee qhov kev thauj khoom-cov kabmob xws li txuas hniav thiab cov yees tuaj yeem ua haujlwm tau ntau dua ib puas xyoo. Cov chaw qhuav, qis- nag lossis daus no los ntawm kev muaj kuab paug ua rau huab cua huab cua tuaj yeem tsim cov txheej ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Corrosion npaum li cas ntawm 0.01-0.03 hli / xyoo, ua kom nws cov corrosion kuj zoo.
Plaub yam tseem ceeb cuam tshuam rau sab nraum zoov kev pab cuam lub neej ntawm Weathering Steel
1. Cov khoom sib xyaw thiab cov khoom siv alloying
Kev tiv thaiv corrosion ntawm huab cua steel cia siab rau kev sib koom ua ke ntawm cov hlau alloying xws li Cu, P, Cr, Ni, thiab Mo los ua ib txheej tuab, amorphous tiv thaiv xeb.
Kev sib piv ntawm cov hlau tsis zoo lossis cov khoom sib cais tuaj yeem ua rau xoob, yooj yim tshem tawm xeb txheej, cuam tshuam nws tus kheej - muaj peev xwm tiv thaiv.
Tsis txaus steel purity (ntau tshaj sulfur / phosphorus, ntau inclusions) accelerates localized corrosion.
2. Huab cua ib puag ncig thiab kev pabcuam
Qhov kev siv ntawm corrosive agents nyob rau hauv txawv sab nraum zoov ib puag ncig ncaj qha txiav txim tus nqi corrosion:
Kev nyab xeeb hom: Kub, av noo, nag huab cua nrawm electrochemical corrosion. Qhuav, qis- thaj tsam nag lossis daus txhawb kev txhim kho xeb ntau dua thiab ua haujlwm ntev dua.
Corrosive Media: ntug hiav txwv ntsev pos huab, thaj chaw muaj kuab paug, thiab txoj kev deicing ntsev (chloride ions) tuaj yeem rhuav tshem cov txheej xeb, ua rau lub neej luv luv.
3. Kev tsim qauv tsim thiab kev tsim kho
Kev tsim thiab kev tsim kho qhov tsis zoo tsim cov qhov muag tsis pom kev xeb, ua qhov tseem ceeb ntawm kev ua tsis tiav sab nraum zoov ntxov ntxov.
Liquid/Dust Accumulation Design: Grooves, dead corners, and overlapping joints nkag tau cov dej thiab plua plav, tsim kom tsis txhob ntub dej corrosive ib puag ncig.
Dissimilar Hlau Sib cuag: Kev sib cuag ncaj qha nrog carbon steel, stainless hlau, tooj liab, thiab lwm yam, induces galvanic corrosion, nyiam tshaj tawm tsam huab cua.
Vuam thiab txheej tsis xws luag: Tsis muaj kev tiv thaiv welds, puas coatings, los yog tsis huv oxide nplai ntawm qhov chaw txiav tsim cov ntsiab lus corrosion.
4. Tshaj tawm -Txoj Kev Txhim Kho
Initial Rust Layer Care: Thawj 1-3 xyoos sab nraum zoov yog qhov tseem ceeb rau kev txhim kho xeb txheej. Zam tsis txhob ntxuav thiab khawb txhua yam.
Kev Tu Txhuam Hniav: Tshem tawm cov plua plav, ntsev, thiab cov khib nyiab pov tseg kom tsis txhob muaj cov kab mob corrosive hauv zos.
Kev Kho Kev puas tsuaj: Tam sim ntawd kho cov coatings puas thiab xeb qhov chaw weld. Siv cov txheej txheej sealing los txhawb siab - thaj tsam corrosion.
Kev kho tsis raug: Kev siv cov txheej txheem uas tsis yog - siv tau los yog siv cov kua qaub / alkali zoo rau kev tshem tawm xeb yuav ua rau cov txheej txheem tiv thaiv xeb.
Tswv yim tswv yim rau Extending lub sab nraum zoov kev pab cuam lub neej ntawm Weathering Steel
Raws li kev coj ua hauv kev lag luam, cov nqi no -cov txheej txheem ua tau zoo tuaj yeem txuas ntxiv lub neej kev pabcuam sab nraum zoov ntawm huab cua steel, haum rau ntau yam haujlwm sab nraum zoov:
1. Xaiv Cov Qib uas tsim nyog:Xaiv cov qib raws li kev siv corrosion ntawm ib puag ncig. Rau cov qauv ib puag ncig, siv Q235NH lossis Q355NH. Rau cov ntug dej hiav txwv, xaiv cov qib resistant rau marine corrosion. Rau ib puag ncig tshuaj lom neeg hnyav, xaiv qib siab -kawg zoo li Q415NHC. Ua ntej thicknesses ntawm 8 hli los yog ntau dua; rau kev thauj khoom-cov kabmob, siv 12mm lossis ntau dua los ua kom muaj kev tiv thaiv corrosion.
2. Txuj kev ua thiab kev teeb tsa:Ua annealing tom qab vuam los kho cov cua sov- thaj tsam cuam tshuam. Tsis txhob sib xyaw nrog cov pa roj carbon zoo tib yam. Xyuas kom tsim tau cov kua dej kom zoo thaum lub sij hawm kev teeb tsa kom tsis txhob muaj dej sib sau. Ntxuav qhov chaw tam sim ntawd tom qab txiav los yog sib tsoo los txhawb cov txheej txheej xeb tsis sib xws.
3. Kev tu me me:Ntxuav cov khib nyiab thiab plua plav 1-2 zaug ib xyoos ib zaug, nce zaus hauv cov ntug dej hiav txwv. Kho cov txheej txheej xeb sai sai nrog cov tshuaj xeb tshwj xeeb txhawm rau tiv thaiv kev sib kis hauv zos.
4. Txhim khu kev tiv thaiv:Nyob rau hauv ib puag ncig hnyav, siv cov fluorocarbon xim coatings los yog kub -dip galvanizing rau weathering steel nto kom cais cov corrosive agents. Txhim kho corrosion- lub tes tsho tiv thaiv rau ntawm qhov chaw tseem ceeb (piv txwv li, welds, pob qij txha) rau kev tiv thaiv.
Cov ntsiab lus
Lub neej kev pab cuam ntawm weathering steel nyob rau hauv sab nraum zoov ib puag ncig yog feem ntau ntawm 15 thiab 50 xyoo, tsis muaj tus qauv ruaj. Hauv cov chaw hauv nroog thiab nyob deb nroog, nws tuaj yeem ntseeg tau rau 20 mus rau 35 xyoo yam tsis muaj kev saib xyuas nyuaj. Hauv qhov chaw zoo tshaj plaws xws li cov cheeb tsam qhuav hauv av, cov qib siab - cov qhab nia zoo tuaj yeem kav ntev dua 50 xyoo. Nyob rau hauv ib puag ncig hnyav xws li marine thiab industrial chaw, kev pab cuam lub neej ntawm 10 mus rau 30 xyoo tuaj yeem ua kom ntseeg tau los ntawm kev xaiv cov khoom zoo thiab kev saib xyuas yooj yim.
Yuxin tuam txhabyog tus neeg sawv cev steel. Lub lag luam tseem ceeb ntawm peb lub tuam txhab yog: nruab nrab thiab tuab daim hlau, ductile cam khwb cia hlau yeeb nkab, seamless kav, deformed tuav, thiab lwm yam ntawm Angang, Hangang, Wugang, Nangang, Shagang thiab lwm yam steel nroj tsuag, raws li zoo raws li ntau yam steel muaj feem xyuam rau cov khoom. Yog tias koj xav paub ntau ntxiv txog peb cov khoom, thov koj xav xa email rau peb!info@chinasteelcompany.com
