Corten Steel yog dav siv hauv kev hla- hiav txwv txuas hniav, chaw nres nkoj thiab lwm yam dej hiav txwv-txoj haujlwm cuam tshuam vim nws tus kheej- kev tiv thaiv kev ua haujlwm. Txawm li cas los xij, nyob rau hauv siab - ntsev- ib puag ncig tshuaj tsuag, chloride ions (Cl⁻) hauv hiav txwv pos tuaj yeem nkag mus rau hauv cov txheej txheem xeb yooj yim, rhuav tshem qhov tsim ntawm ntom -FeOOH tiv thaiv xeb txheej, thiab txawm ua rau pitting corrosion. Yog li ntawd, xaiv siab -qib huab cua- tiv taus Corten Steel (xws li S355J0WP, Q355GNH) tsuas yog qhov yooj yim lav; Kev sib koom ua ke tsim nyog pab tiv thaiv- kev ntsuas corrosion yog qhov tseem ceeb los txuas ntxiv lub neej kev pabcuam ntawm cov qauv. Kab lus no yuav piav qhia txog cov kev pabcuam pabcuam thiab lawv cov nqi nce ntxiv, muab cov lus qhia siv tau rau cov neeg siv khoom txawv tebchaws.
1. Kev Pabcuam Tseem Ceeb Los Tiv Thaiv -Kev Ntsuas Kev Tiv Thaiv Kev Tiv Thaiv rau Siab - ntsev- Txau ib puag ncig
Lub hom phiaj tseem ceeb ntawm kev pabcuam tiv thaiv- kev ntsuas corrosion yog los thaiv kev nkag mus ntawm Cl⁻ thiab ua kom cov txheej txheem corrosion qeeb. Cov hauv qab no yog cov kev ntsuas feem ntau siv thiab ua tau zoo, uas tuaj yeem xaiv lossis ua ke raws li qhov project tshwj xeeb (xws li tus ntoo khaub lig- hiav txwv choj lub ntsiab kab teeb, chaw nres nkoj railings, wharf Cheebtsam):
1.1 Silane Impregnation Kev Kho Mob
Silane impregnation yog siv dav siv "inorganic anti-corrosion" ntsuas, uas yog haum rau ntau yam Corten Steel Cheebtsam nyob rau hauv siab - ntsev- tshuaj tsuag ib puag ncig. Its working principle is to form a dense and water-repellent siloxane film on the surface of Corten Steel and in the rust layer pores, which can effectively block the penetration of Cl⁻, water and oxygen without affecting the formation of the self-protective rust layer.
Cov ntsiab lus tsim kho: Ua ntej, ntxuav lub ntsej muag ntawm Corten Steel (tshem cov xeb xoob, cov roj stains thiab impurities), tom qab ntawd tshuaj tsuag lossis txhuam cov silane impregnating tus neeg sawv cev (feem ntau yog diluted nrog dej deionized), thiab kho hauv chav sov li 24-48 teev. Rau cov khoom tseem ceeb (xws li tus choj thauj khoom-cov kabmob), ob lub tsho tiv no tau pom zoo los xyuas kom meej cov yeeb yaj kiab tuab (qhuav zaj duab xis thickness ntau dua lossis sib npaug li 10 μm).
Siv tau Scenarios: Hla- hiav txwv choj cov khoom siv hauv hiav txwv, cov chaw nres nkoj steel qauv, thiab cov khoom siv uas yuav tsum tau khaws cov xim xim ntawm Corten Steel (silane impregnation yog pob tshab thiab tsis hloov qhov tsos).
1.2 Anti-Corrosion Txheej System
Rau cov khoom uas muaj kev tiv thaiv corrosion siab (xws li tus ntoo khaub lig- hiav txwv choj lub ntsiab kab teeb, wharf bearing structures), muaj kev tshaj lij los tiv thaiv -corrosion txheej txheej txheem tuaj yeem siv. Lub kaw lus feem ntau yog siv cov qauv "primer + topcoat", thiab cov ntaub ntawv txheej tau xaiv rau lawv qhov muaj zog tiv thaiv ntsev thiab tshuaj chloride ion yaig.
Common Coating Combinations: Epoxy zinc-nplua nuj primer (qhuav zaj duab xis thickness 60-80 μm) + fluorocarbon topcoat (qhuav zaj duab xis thickness 40-60 μm). Epoxy zinc-nplua nuj primer muaj kev tiv thaiv zoo heev cathodic thiab adhesion, thaum fluorocarbon topcoat muaj zog tiv thaiv huab cua, UV tsis kam thiab ntsev tsuag, thiab lub neej kev pab cuam ntawm txheej txheej tuaj yeem ncav cuag 15-20 xyoo.
Siv tau Scenarios: Cov khoom tseem ceeb-cov kabmob ntawm tus ntoo khaub lig- hiav txwv txuas hniav, chaw nres nkoj crane steel qauv, thiab cov khoom siv ntev ntev - raug rau cov dej hiav txwv ncaj qha.
1.3 Kev tiv thaiv Cathodic
Kev tiv thaiv Cathodic yog ib qho kev ntsuas "tiv thaiv-corrosion", uas feem ntau siv nrog rau lwm yam kev ntsuas rau loj - nplai Corten Steel cov qauv hauv siab - ntsev- tshuaj tsuag ib puag ncig. Nws ua haujlwm los ntawm kev ua Corten Steel qauv cathode hauv electrochemical corrosion cell, yog li inhibiting anodic dissolution (corrosion) ntawm cov hlau.
Hom Hom: Sacrificial anode cathodic tiv thaiv (siv zinc alloy lossis aluminium alloy anodes, uas tau nruab rau ntawm Corten Steel qauv thiab corrode lawv tus kheej los tiv thaiv cov hlau) thiab txaus siab rau kev tiv thaiv cathodic tam sim no (siv cov khoom siv hluav taws xob sab nraud los muab tam sim no, haum rau loj - nplai cov qauv xws li hla - hiav txwv txuas hniav). Sacrificial anode tiv thaiv yog dav siv nyob rau hauv cov chaw nres nkoj vim nws yooj yim installation thiab tsis tshua muaj nqi txij nkawm.
Siv tau Scenarios: Hla- hiav txwv choj substructures (xws li piers), chaw nres nkoj wharf pawg, thiab loj - nplai marine steel qauv.
1.4 Sealing Protection & Drainage Design
Ntxiv rau cov khoom siv thiab tshuaj tiv thaiv- kev ntsuas corrosion, kev tsim qauv tsim kom zoo kuj tuaj yeem txo qhov kev pheej hmoo corrosion. Kev tiv thaiv kev sib khi thiab kev tsim cov dej tsim nyog tuaj yeem zam qhov sib xyaw ntawm cov dej ntsev rau saum npoo ntawm Corten Steel, yog li txo qhov kev yaig ntawm Cl⁻.
Kev ntsuas tshwj xeeb: Siv huab cua- cov sealants tiv taus (xws li nruab nrab silicone sealants) los kaw cov pob qij txha thiab lub qhov ntsia hlau ntawm Corten Steel Cheebtsam; tsim ib txoj kab nqes tsim nyog rau saum npoo ntawm cov khoom kom ntseeg tau tias cov dej nag thiab dej hiav txwv tuaj yeem ntws sai sai; nruab cov twj tso kua dej rau hauv qab ntawm cov khoom kom tsis txhob muaj dej ntau ntxiv.
Siv tau Scenarios: Tag nrho cov siab - ntsev- tshuaj tsuag ib puag ncig Corten Steel cov qauv, tshwj xeeb tshaj yog cov pob qij txha thiab cov ntsia liaj qhov rooj txuas.
1.5 Tsis tu ncua tu & xeb txheej kho
Kev saib xyuas tsis tu ncua yog ib qho tseem ceeb lav rau lub sijhawm ntev - kev ua tau zoo ntawm kev tiv thaiv - kev ntsuas corrosion. Rau Corten Steel cov qauv hauv siab - ntsev- qhov chaw tshuaj tsuag, kev tshuaj xyuas tsis tu ncua thiab xeb txheej txheej yuav tsum tau ua kom raws sijhawm nrog cov teeb meem corrosion hauv zos.
Cov ntsiab lus tu: Tshawb xyuas cov txheej txheej xeb thiab tiv thaiv -corrosion txheej txhua 1-2 xyoos; rau cov khaubncaws sab nraud povtseg lossis puas xeb, siv cov tshuaj xeb tshem tawm los ntxuav lawv thiab tom qab ntawd siv cov hlau xeb accelerator thiab curing agent; rau cov coatings puas, kho lawv nyob rau hauv lub sij hawm raws li tus thawj txheej txheej txheem.
2. Tus nqi cuam tshuam ntawm Kev Pab Cuam Tiv Thaiv -Corrosion Measures
Tus nqi nce ntxiv ntawm kev pabcuam tiv thaiv- kev ntsuas corrosion txawv raws li hom kev ntsuas, qhov nyuaj ntawm kev tsim kho thiab thaj chaw tiv thaiv. Cov hauv qab no yog tus nqi ntau ntawm cov kev ntsuas sib txawv (siv tus nqi ntawm Corten Steel cov khoom siv raws li kev siv, chav tsev yog USD / ㎡, thiab cov nqi tshwj xeeb cuam tshuam los ntawm qhov project nplai thiab cov xwm txheej hauv cheeb tsam):
2.1 Kev kho Silane Impregnation
Tus nqi ntawm silane impregnating tus neeg sawv cev yog kwv yees li 8-12 USD / L, thiab qhov ntau npaum li cas ib square meter yog 0.2-0.3 L (rau ib lub tsho tiv no). Tus nqi tag nrho (nrog rau cov khoom siv, kev ua haujlwm thiab kev tu saum npoo av) yog 3-6 USD / ㎡, uas ua rau tag nrho cov nqi ntawm cov khoom siv los ntawm kwv yees li 5-10% (raws li cov khoom siv hauv paus nqi ntawm 60 USD / ㎡).
2.2 Anti-Corrosion Txheej System
Tus nqi ntawm epoxy zinc- nplua nuj primer yog li 15-20 USD / L, thiab tus nqi ntawm fluorocarbon topcoat yog li 30-40 USD / L. Tag nrho cov khoom siv tus nqi ib square meter yog 12-18 USD, ntxiv rau cov nqi zog thiab kev kho deg, tus nqi tag nrho yog 18-25 USD / ㎡. Tag nrho cov nqi ntawm cov khoom yuav nce li ntawm 30-35%.
2.3 Kev tiv thaiv Cathodic
Tus nqi ntawm kev tiv thaiv anode cathodic yog tus nqi qis: tus nqi ntawm zinc alloy anodes yog kwv yees li 5-8 USD / kg, thiab tus nqi installation ib square meter yog 10-15 USD. Tus nqi tag nrho yog 15-20 USD / ㎡, thiab tus nqi nce ntxiv yog li 25-30%. Tus nqi pib ntawm kev tiv thaiv cathodic tam sim no siab dua (kwv yees 25-35 USD / ㎡), tab sis nws yog tus nqi ntau dua rau cov qauv loj nrog lub neej ua haujlwm ntau dua 30 xyoo.
2.4 Sealing Protection & Drainage Design
Tus nqi ntawm huab cua-cov sealants tiv taus yog li 12-15 USD / L, thiab qhov ntau npaum li cas rau ib lub meter ntawm kev sib koom ua ke yog 0.1-0.2 L. Tus nqi tag nrho (xws li sealants thiab installation) yog 2-4 USD / ㎡, thiab tus nqi nce ntxiv yog li 3-5%. Kev tsim cov kua dej tsuas yog nce tus nqi tsim, thiab tus nqi ntxiv yog qhov tsis txaus ntseeg nyob rau hauv tag nrho cov nqi ntawm qhov project.
2.5 Tsis tu ncua tu & xeb txheej kho
Tus nqi tu txhua xyoo yog kwv yees li 1-2 USD/㎡, suav txog li 1-3% ntawm tag nrho cov nqi ntawm cov khoom. Txawm hais tias nws yog tus nqi txuas mus ntev, nws tuaj yeem txuas ntxiv kev pabcuam lub neej ntawm cov qauv los ntawm 10-15 xyoo, uas muaj txiaj ntsig zoo rau kev lag luam mus ntev.
3. Summary & Xaiv cov lus qhia
Hauv siab - ntsev- qhov chaw tshuaj tsuag, kev sib xyaw ua ke ntawm qib siab - qib Corten Steel thiab pab tiv thaiv kev tiv thaiv - kev ntsuas corrosion tuaj yeem ua kom lub neej ua haujlwm zoo. Los ntawm qhov kev xav ntawm tus nqi thiab cov nyhuv: silane impregnation yog tsim rau cov haujlwm uas yuav tsum tau khaws cov xim xeb thiab muaj cov kev xav tau ntawm cov corrosion kuj; cov txheej txheem tiv thaiv -corrosion txheej yog tsim rau cov khoom tseem ceeb -cov kabmob uas muaj cov kev xav tau zoo corrosion; sacrificial anode cathodic tiv thaiv yog tsim rau loj -scale marine lug xws li chaw nres nkoj wharfs.
Rau cov neeg siv khoom txawv teb chaws, nws raug nquahu kom ua tiav qhov kev xav tau ntawm lub neej kev pabcuam, kev siv nyiaj txiag thiab kev xav tau thaum xaiv cov kev pabcuam tiv thaiv - kev ntsuas corrosion. Piv txwv li, rau tus ntoo khaub lig- hiav txwv choj auxiliary railings uas yuav tsum tau khaws lub ntuj xeb xim ntawm Corten Steel, silane impregnation + sealing tiv thaiv tuaj yeem xaiv tau; rau qhov chaw nres nkoj crane load-cov kabmob cov qauv uas muaj kev tiv thaiv corrosion siab, tiv thaiv -corrosion txheej txheej + kev saib xyuas tsis tu ncua. Txawm hais tias pab tiv thaiv kev tiv thaiv- kev ntsuas corrosion yuav nce tus nqi pib los ntawm 5-35%, lawv tuaj yeem txo qhov kev saib xyuas tom qab thiab txuas ntxiv lub neej kev pab cuam, uas yog tus nqi ntau dua nyob rau lub sijhawm ntev.
