1. Corten-Ib tug huab cua tsis kam thiab corrosion kuj phaj yog lub ntsiab lus ntawm huab cua tsis kam, corrosion kuj thiab siab tensile zog steel.
Ntawm tag nrho cov khoom siv hlau, steel yog cov paub zoo tshaj plaws rau peb. Vim tias cov hlau muaj lub zog tensile siab thiab yooj yim rau khoov, txiav, laum thiab vuam, nws yog dav siv hauv ntau lub tsev thiab cov chaw tsim khoom. Txawm li cas los xij, ib qho teeb meem uas cuam tshuam rau tib neeg feem ntau txog cov hlau yog "corrosion thiab xeb." Yog li ntawd, yuav ua li cas tiv thaiv corrosion tau dhau los ua ib lub ntsiab lus tseem ceeb kawm los ntawm cov kws tshaj lij. Muaj ntau txoj hauv kev los tiv thaiv corrosion. Feem ntau hais lus, lawv tuaj yeem muab faib ua peb hom. Thawj txoj hauv kev yog siv cov txheej txheem ntawm cov khoom ntawm cov hlau kom cais cov kev sib cuag ntawm cov hlau thiab ib puag ncig thiab tiv thaiv corrosion. Qhov thib ob yog qhov muaj peev xwm tiv thaiv xeb xeb. Hom thib peb tsom rau kev hloov cov khoom ntawm cov hlau kom ua tiav cov nyhuv ntawm kev tiv thaiv corrosion. COR-TEN steel qhia hauv kab lus no yog ib qho piv txwv ntawm peb txoj kev tiv thaiv xeb.
Corten-A steel yog thawj zaug siv hauv cov tsev hauv xyoo 1958 vim nws cov khoom tiv thaiv corrosion. Tom qab ntawd nws tau siv rau hauv cov choj, tsheb ciav hlau, tsheb, tsheb thauj khoom thiab cov chaw tsim khoom, thiab nws cov kev siv tau dhau los ua ntau dua. Hais txog kev siv choj, piv txwv li, hauv Tebchaws Meskas thiab Nyij Pooj, Arakawa Steel Choj nyuam qhuav tsim hauv Tokyo Bay, Nyiv, yog 840 meters ntev thiab yog tsim los ntawm Corten-A steel tag nrho.
2. Hom thiab tshuaj muaj pes tsawg leeg ntawm Corten-A
Corten-A, ib hom huab cua huab cua, yog tsim los ntawm kev ntxiv me ntsis tooj liab, chromium, phosphorus, thiab lwm yam khoom rau cov hlau zoo tib yam thiab tau txais kev kho tshwj xeeb. Nws cov huab cua thiab corrosion kuj yog peb mus rau peb npaug ntau dua li cov hlau zoo tib yam. Yim zaus. Raws li ntau hom thiab kev siv, Corten-A tuaj yeem muab faib ua plaub hom: COR-TEN A, COR-TEN B, COR-TEN C, COR-TEN B-QT. Ntawm lawv, huab cua tsis kam thiab corrosion kuj ntawm COR-TEN A yog tsib mus rau yim npaug zoo dua li cov hlau zoo tib yam, thaum huab cua tsis kam thiab corrosion kuj ntawm COR-TEN B yog plaub zaug zoo dua li cov hlau zoo tib yam.
3. Anti-corrosion txoj cai
Qhov zoo tshaj plaws atmospheric corrosion kuj yog vim yog tsim ntawm ib tug ntom xeb txheej ntawm cov hlau, uas cais cov hlau matrix ntawm huab cua thiab zoo tiv thaiv kev loj hlob ntawm xeb. Cov ntsiab lus tshwj xeeb uas muaj nyob rau hauv COR-TEN tsim cov oxide zaj duab xis tom qab kev sib cuag nrog cov cua. Cov yeeb yaj kiab muaj zog no cais COR-TEN los ntawm lub ntiaj teb sab nraud thiab tsis cuam tshuam los ntawm kev nyab xeeb, ua tiav lub hom phiaj ntawm huab cua tsis kam thiab corrosion kuj. Thaum Corten-A lossis cov hlau zoo tib yam raug rau cov cua thiab nkag mus rau hauv cov dej noo thiab oxygen, cov tshuaj lom neeg hauv qab no yuav tshwm sim:
Fe+0502+H2O → Fe(OH)2
2Fe(OH)2+0.502+H2O → 2Fe(OH)3
Muaj cov yeeb yaj kiab muaj zog rau sab nraud ntawm Corten-A steel khoom, uas thaiv cov dej noo, oxygen thiab tshuaj lom neeg nrog cov khoom siv hlau. Raws li yog vim li cas Corten-A muaj me me ntawm tooj liab, chromium, phosphorus, thiab lwm yam, nws tuaj yeem tsim cov yeeb yaj kiab tiv thaiv. Txog tam sim no, Pawg neeg txiav txim tseem tawm, tab sis peb tuaj yeem tau txais kev tshoov siab los ntawm cov ntsiab lus hauv qab no:
(1) Yuav luag tsis muaj FeOOH (cov qauv kev sim ntawm Fe2O3.H2O) nyob rau hauv lub hauv paus txheej ntawm Corten-A, thiab cov khoom oxide zaj duab xis yog tsim los ntawm FeOOH txheej thiab ob peb txheej txheej. Txawm li cas los xij, qhov no tsis yog cov khoom siv hlau zoo tib yam. FeOOH yog txawm generated ncaj qha rau ntawm lub hauv paus txheej, yog li ua rau tawg thiab tom qab tev.
(2) Cov oxide zaj duab xis ntawm FeOOH txheej thiab lub hauv paus txheej yog radiographically amorphous. (3) tooj liab, chromium, thiab phosphorus yog tag nrho cov concentrated nyob rau hauv amorphous txheej, thaum sulfur yog sib npaug zos rau ntawm no oxide zaj duab xis nyob rau hauv daim ntawv ntawm sulfate radicals. Kev sib piv ntawm corrosion tus nqi ntawm Corten-A steel cov khoom thiab cov khoom siv hlau dav dav tuaj yeem qhia tau los ntawm ob qhov kev kuaj pom. Thawj qhov kev sim tau ua tiav hauv Kenney, New Jersey, Tebchaws Asmeskas, thiab qhov kev sim thib ob tau ua tiav hauv Hyogo Prefecture, Nyiv (ob qhov chaw sim yog thaj chaw muaj kev lag luam). Corten-A (corten steel) corrosion nres tom qab peb mus rau plaub xyoos ntawm kev sim, thaum lwm yam kev sim steel cov ntaub ntawv txuas ntxiv mus corrode. Qhov tsim ntawm oxide zaj duab xis muaj feem xyuam rau cov xwm txheej huab cua. Feem ntau hais lus, kev nyab xeeb yam muaj xws li: kub, hnub ci lub sij hawm, av noo, nag, cua ceev, carbon dioxide thiab ntsev cov ntsiab lus nyob rau hauv cov huab cua, thiab lwm yam. Feem ntau cov ntsiab lus no ncaj qha proportional rau tus nqi corrosion. Raws li kev sim ua nyob rau hauv Cape Ashizuri, Shikoku, Nyiv, qhov kub, av noo, thiab salinity yog tag nrho. Tus nqi corrosion ntawm cov hlau dav dav ncav cuag 0.75 hli hauv ib xyoos, thaum tus nqi corrosion ntawm Corten-A yog 0.75 hli hauv ib xyoos. Tsuas yog 0.25mm. Qhov kev sim tau siv sijhawm yim xyoo, tab sis tom qab tsib xyoos, tus nqi ntawm Corten-A tau txo qis heev, thaum cov hlau zoo tib yam txuas ntxiv mus. Kev kwv yees dav dav. Hauv Nyij Pooj, nws yuav siv sijhawm li tsib mus rau yim xyoo los tsim cov yeeb yaj kiab oxide ruaj khov, thaum nyob hauv Taiwan nws yuav siv li yim xyoo.
yog li ntawd. Vim muaj qhov sib txawv hauv cheeb tsam, ib puag ncig thiab kev nyab xeeb, lub sijhawm nws siv rau cov khoom siv oxide zaj duab xis los tsim rau ntawm Corten-A kuj txawv heev. Txhawm rau tsim cov oxide zaj duab xis ruaj khov no kom sai li sai tau, feem ntau yog thaum siv COR-TEN hauv cov teb chaws kob, huab cua-coated kho-ment yuav tsum ua kom yooj yim rau COR-TEN kom siv nws cov huab cua-resistant thiab tiv thaiv corrosion. .
