Lub ntsiab kom zoo dua ntawmhuab cua steellies nyob rau hauv lub ntom xeb txheej nws tsim nyob rau hauv tej yam ntuj tso ib puag ncig. Txawm li cas los xij, kev ruaj ntseg ntawm cov txheej txheem tiv thaiv no yog ze rau ib puag ncig, ua rau muaj kev hloov pauv loj hauv nws cov huab cua tsis kam thiab cov khoom siv kho tshuab. Raws li qis- alloy steel uas muaj cov ntsiab lus xws li tooj liab, chromium, thiab npib tsib xee, nws qhov kev ua tau zoo yuav tsum raug soj ntsuam tag nrho los ntawm kev txiav txim siab ib puag ncig ib puag ncig xws li atmospheric humidity, ntsev cov ntsiab lus, thiab cov pa phem concentration. Nws qhov tsim nyog rau cov ntawv thov tshwj xeeb thiab kev pabcuam lub neej yog txiav txim ncaj qha los ntawm nws qhov kev ua tau zoo hauv cov xwm txheej sib txawv.
Nyob rau hauv huab cua qhuav atmospheric ib puag ncig, weathering steel qhia pom kev ua tau zoo. Nrog rau cov av noo qis dua 60% thiab cov pa phem tsawg, ib qho tsis sib xws, ntom -FeOOH xeb txheej sai sai rau ntawm cov hlau. Cov txheej xeb no zoo thaiv cov pa oxygen thiab noo noo nkag mus, ua tiav huab cua tiv thaiv 6-8 npaug ntau dua li cov pa roj carbon zoo tib yam. Piv txwv li, nyob rau sab qaum teb inland nroog ntawm Tuam Tshoj, lub nroog guardrails thiab txoj kev ncej ncej ua los ntawm Q355NH weathering steel tsim tsuas yog ib tug ruaj khov rust txheej nyob rau hauv lawv qhov chaw nyob rau hauv 15 xyoo ntawm kev pab cuam, tsis muaj xeb tseem ceeb flaking thiab tsawg dua 5% mechanical khoom degradation. Tsis tas li ntawd, tsis muaj kev saib xyuas txheej yuav tsum tau siv thaum siv, txo cov nqi tag nrho lub neej. Nyob rau hauv ib puag ncig no, nws cov weldability thiab formability tseem nyob ruaj khov, haum rau ntau yam kev tsim fabrication.
Marine thiab Coastal Environments
Nyob rau hauv marine thiab ntug hiav txwv ib puag ncig uas muaj ntsev pos huab, kev ua tau zoo ntawm weathering steel yog ho cuam tshuam los ntawm chloride ion corrosion, exhibiting me ntsis inferior kev ua tau zoo piv rau qhuav ib puag ncig. Chloride ions nyob rau hauv ntug dej hiav txwv ntsev tsuag nkag mus rau hauv lub xeb txheej, cuam tshuam nws cov qauv ntom thiab tsim ib tug ntxeem tau -FeOOH xeb txheej uas accelerates substrate corrosion. Hauv cov xwm txheej zoo li no, tshwj xeeb marine corrosion- qib tiv taus zoo li Corten B weathering steel yuav tsum raug xaiv. Cov qib no txhim kho cov tshuaj chloride ion tiv thaiv los ntawm kev ua kom zoo dua chromium thiab cov ntsiab lus nickel. Hauv qis- ntsev- huab cua nyob ze thaj chaw ntug hiav txwv, kev pab cuam lub neej tseem tuaj yeem txuas ntxiv los ntawm ntau dua ob npaug ntawm cov pa roj carbon zoo tib yam, ua rau nws siv dav hauv cov ntawv thov xws li ntim khoom thiab ze ntawm - ntug dej hiav txwv bearings. Txawm li cas los xij, nyob rau hauv siab - ntsev- pos huab offshore platforms thiab chaw nres nkoj, huab cua steel ib leeg tsis tuaj yeem ua tau raws sijhawm ntev -. Nws yuav tsum tau ua ke nrog cov tshuaj tiv thaiv- cov coatings los yog cathodic tiv thaiv ntsuas los tiv thaiv pitting thiab crevice corrosion.
Nyob rau hauv kev lag luam muaj kuab paug ib puag ncig, acidic media ho degrade cov kev ua tau zoo ntawm weathering hlau. Nyob ib ncig ntawm metallurgical thiab tshuaj nroj tsuag, acidic gases xws li sulfur dioxide thiab nitrogen oxides nyob rau hauv cov huab cua reacts nrog dej los tsim kua qaub los yog acidic condensation. Qhov no dissolves alloy ntsiab nyob rau hauv lub xeb txheej, compromising lub txheej tiv thaiv kev ncaj ncees thiab accelerating corrosion tus nqi los ntawm 3 mus rau 5 zaug. Nyob rau hauv ib puag ncig zoo li no, huab cua steel yuav tsum ntiav cov qib tshwj xeeb nrog cov ntsiab lus siab alloy, xws li Q460NHY. Kev tshuaj xyuas tsis tu ncua ntawm cov txheej xeb yog qhov tseem ceeb, nrog rau qhov chaw kov-ups ua raws li qhov xav tau. Piv txwv li, cov cuab yeej pabcuam rau cov roj derricks hauv cov chaw ua haujlwm tshuaj lom neeg, tsim siv qib no thiab khaws cia los ntawm kev tshem tawm cov xeb, khaws cov khoom ruaj khov tom qab 10 xyoo kev pabcuam. Tau siv cov huab cua zoo tib yam hlau, qhov chaw perforation corrosion kuj yuav tshwm sim.
Siab-Hummidity Enclosed thiab Acid-Alkali Corrosive Ib puag ncig
Nyob rau hauv siab -cov av nyob ib puag ncig qhov chaw thiab cov kua qaub-alkali corrosive ib puag ncig, kev ua tau zoo ntawm huab cua steel deteriorates sai thiab tej zaum yuav txawm ua tsis tiav. Nyob rau hauv qhov chaw tsis zoo, qhov chaw nyob ze (xws li cov chaw siv hluav taws xob hauv av lossis cov tsev khaws khoom kaw), huab cua ncig yog txwv, tiv thaiv cov txheej xeb los ntawm ziab thiab khov. Qhov no pab txhawb kev tsim cov khoom ntub, xoob xoob xoob xoob xoob xoob xoob uas ua kom muaj corrosion ntawm lub hauv paus hlau. Nyob rau hauv ib puag ncig muaj zog acid lossis alkali, cov xeb txheej tsim los ntawm cov ntsiab lus alloy yog ncaj qha yaj, tiv thaiv kev tiv thaiv zoo. Nyob rau hauv cov xwm txheej no, qhov corrosion kuj ntawm weathering steel txawv me ntsis los ntawm cov pa roj carbon zoo tib yam, thaum nws cov cuab yeej cuab tam sai deteriorate vim corrosion embrittlement. Yog li ntawd, kev siv cov hlau tsis muaj huab cua yog nruj me ntsis txwv tsis pub nyob rau hauv cov xwm txheej zoo li no. Yog tias nws siv tsis tau, nws yuav tsum tau ua ke nrog cov tshuaj tiv thaiv -corrosion linings lossis coatings tshwj xeeb. Nws yog qhov tsis tsim nyog rau cov qauv tseem ceeb xws li cov dej haus dej sib cuag los yog ntim rau cov kua qaub thiab alkalis.
Kev ua tau zoo ntawm weathering steel tsis yog tus nqi ruaj khov tab sis yog qhov tshwm sim ntawm kev sib xyaw ua ke ntawm ib puag ncig thiab cov khoom siv. Hauv cov huab cua qhuav, huv si nrog ntub dej zoo - caij tsheb kauj vab qhuav, huab cua hlau tuaj yeem ua kom pom nws qhov zoo ntawm corrosion. Txawm li cas los xij, nyob rau hauv ib puag ncig uas muaj salinity siab, high humidity, hnyav hnyav, los yog kaw, nws cov kev ua tau zoo yuav deteriorates.
Tsuas yog los ntawm kev ntsuam xyuas tag nrho ntawm ib puag ncig, kev tsim qauv tsim nyog, thiab kev tiv thaiv kev tiv thaiv tsim nyog tuaj yeem ua rau huab cua steel tiag tiag paub txog nws cov nqi tsim vaj tsev thiab kev nyab xeeb mus ntev -.
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 hais txog cov khoom. Yog tias koj xav paub ntau ntxiv txog peb cov khoom, thov koj xav xa email rau peb!info@chinasteelcompany.com
