1.What yog cov "kev txwv" ntawm corrosion tsis kam ntawm galvanized steel sawb?
Insolsant rau cov muaj zog acids, alkalis, thiab high {{} {{} {} {{} {} {{{ Txheej yuav nrawm corrode thiab yaj, poob nws cov khoom tiv thaiv thiab ua rau cov khoom siv hauv paus (txias- rob hlau) kom xeb. Piv txwv li, cua tshuab hluav taws xob siv hauv cov nroj tsuag tshuaj ua los ntawm ib lub neej zoo tib yam nkaus tsuas yog muaj ib lub neej ntawm ib mus rau ob xyoos, luv luv dua li cov hlau tsis xeb.
"Dawb xeb": Thaum cov txheej galvanized yog raug rau cov chaw ntub dej (xoob}}} Cov xim dawb no ua rau muaj kev ncaj ncees ntawm cov txheej zinc txheej thiab, yog tias tsis thov kev tiv thaiv kom sai (xws li}}} Reving roj lossis ziab tom qab), accelerates txuas ntxiv. "Tshem kho kom nrawm" yog qhov tshwm sim tom qab txheej galvanized yog thaj chaw sib tsoo los vim yog cov roj teeb sib tsoo yuav ua rau "lub roj teeb ua ntej" nrog ib puag ncig Zinc. Lub sijhawm no, txheej zinc txheej yuav correferently los tiv thaiv tus hlau (kev txi ensode li cas yuav tau noj "concentratedly noj", ua rau cov corrosion ntau yam kom nthuav sai. Qhov tseeb, tus nqi xeb nrawm dua li qhov zoo li tsis yog- galvanized steel daim hlau tom qab kev puas tsuaj hauv zos.
2.Qhov dab tsi yog cov kev txwv ntawm kev ua kev ua tau zoo ntawm galvanized sawb hlau?
Vuam yog qhov nyuaj thiab yuav tsum muaj cov txheej txheem tshwj xeeb. Lub suab nrov ntawm zinc (kwv yees li 419 degree) yog qhov qis dua li ntawm cov hlau (kwv yees li 1538 degree). Thaum lub sij hawm vuam, zinc txheej yooj yim yaj thiab evaporates, tsim cov nyiaj loj ntawm zinc vapor. Qhov no tsis tsuas yog ua rau "porosity" thiab "slag suav" hauv Weld, muaj peev xwm ua rau weld tensile lub zog, uas yog kev phom sij rau kev noj qab haus huv ntawm cov neeg ua haujlwm. Yog li ntawd, vuam galvanized stip yuav tsum tau tshwj xeeb vuam hlau (xws li alietized cov txheej txheem (xws li laser vuam thiab roj thaiv cov nqi arc vuam), nce kev siv cov nqi ntawm arc Zinc Txheej Peeling yog feem ntau tshwm sim thaum nws tus kheej muaj kev ua haujlwm tsis zoo (mus txog 30%, qis dua li 30% rau cov hlau txias-rolled). Thaum lub sij hawm loj-khoov khoov (xws li cua txias siab dua 90 degree), xws li tsim cov kab tawg thiab tev vim yog deformation ntawm substrate. Cov hlau uas raug cov hlau yuav nrawm nrawm tom qab kev ua tiav, xav tau ntxiv rov qab thiab passivation ntxiv.
Tsis tshua muaj qhov chaw tsis yooj yim ua rau nws siv rau hauv cov ntawv thov uas muaj kev cuam tshuam zoo xws li " Thaum lub tshuab hluav taws xob steel Yog li ntawd, galvanized steel sawb yog qhov nyuaj rau siv hauv scenes uas yuav tsum muaj cov paib sab nrauv thiab cov khoom siv sab nrauv thiab tom qab ntawd, lossis siv cov hlau ncaj qha).
3.Qhov dab tsi yog cov kev txwv ntawm galvanized steel sawb hauv cov nqe lus ntawm tus nqi thiab kev tiv thaiv ib puag ncig?
Thawj tus nqi yog siab dua li ntawm dist disty txias {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Cov khoom siv, thiab lwm yam) 10% {{{{{}} 30% siab dua li ntawm txias - rolled steel ntawm tib cov lus tshwj xeeb. Thaum lub sijhawm pabcuam lub neej ntawm Galvanized steel sawb (5 {{} Qhia ncaj qha siv cov hlau stainless lossis corrosion-resistant alloys (uas, uas muaj tus nqi siab dua qub, tuaj yeem muaj lub neej ntev dua 20 xyoo).
Cov txheej txheem ntau lawm yog muaj kuab paug heev thiab muaj cov txheej txheem ib puag ncig ua " Kev kho mob tsis raug cai yuav ua paug av, dej, thiab huab cua. Electrogalvanizing yuav tsum tau siv cov kev cog ntawm plating muaj cov hlau thiab cov chinc thiab chromium, ua kom muaj kev kho dej khib nyiab uas nyuaj thiab muaj nuj nqis. Nrog cov kev cai tiv thaiv ib puag ncig (xws li EU ncav cuag cov txheej txheem kev tiv thaiv (xws li cov khoom siv roj carbon monoxide), uas tsis muaj txiaj ntsig tus nqi ntawm galvanized sawb.
Rov qab siv dua yog qhov nyuaj thiab nkim cov khoom siv: tom qab cov kab hlau loj yog muab tso rau hauv cov roj ntsha Yog tias nws ncaj qha sib xyaw nrog cov hlau zoo tib yam hauv cov txheej txheem smelting, qhov zinc yuav nqus tau rau hauv cov hlau molten, ua rau txo cov hlau ua haujlwm (xws li txo cov hlau). Yog li ntawd, cais cais yog qhov yuav tsum tau rov ua dua tshiab, thiab kev rov ua dua tshiab yog qhov qis dua uas ntawm cov khaub thuas dog dig- cov hlau lossis hlau stainless.
4.Qhov dab tsi yog cov kev txwv ntawm cov khoom ntawm lub cev ntawm galvanized steel sawb?
Cov khoom siv hauv paus lub zog tso siab rau ntawm cov khaub thuas qub {} Lub zog ntawm galvanized thiab tuaj yeem ua kom muaj zog ntawm cov khoom siv hauv paus (txias {1} {dov stip sawb). Yog tias siab - Lub zog Galvanized stipanized strip {}} Lub zog steel los yog siv ua cov khoom siv hauv paus ua ntej galvanizing. Qhov no ntxiv rau cov nqi, thiab cov txheej txheem galvanizing yuav cuam tshuam me ntsis kev loj hlob tuaj yeem ua rau muaj kev loj hlob ntawm cov khoom siv hauv paus, ua rau muaj kev txo me me hauv lub zog).
Nws muaj kev txom nyem siab - kub ua hauj lwm zoo: Dinc muaj qhov chaw siab tsawg (419 degree} Saum toj 300 degree, lub zinc txheej nrawm nrawm nrawm nrawm, poob nws cov nyhuv tiv thaiv. Yog li ntawd, galvanized steel strip tsis tuaj yeem siv nyob rau hauv high {} {} {} {{{{{{{{{tus hlau resistant hlau).
5.Qhov yog qhov tseem ceeb ntawm qhov tsis txaus ntseeg ntawm Galvanized steel sawb?
Nws cov shortcomings tsis yog qhov tsis xws luag, tab sis tab sis tsis pom tseeb hauv cov xwm txheej tshwj xeeb. Piv txwv li, nyob rau hauv ib txwm atmospheric ib puag ncig (xws li Urban vaj tse thiab sab hauv tsev hluav taws xob thiab cov xeb ua kom tau zoo yog qhov ua tau zoo. Txawm li cas los xij, nyob rau hauv ib puag ncig kev kawm rau huab heev corrosion, siab {3} preeschanize, thiab xav tau ib qho kev hloov pauv tshiab, thiab cov kev hloov pauv (xws li cov khoom siv stainless lossis txhuas alloys). Yog li ntawd, thaum xaiv cov khoom lag luam, xav txog kev ua haujlwm, kev siv nyiaj, thiab nyiaj txiag siv nyiaj tsis pom kev.