Xaiv cov hlau tiav rau cov khoom yog ib qho kev txiav txim siab loj hauv qhov project. Galvanized hlau tau dhau los ua ib qho ntawm cov khoom siv kho mob nrov tshaj plaws vim nws lub zog ntau dua, ua haujlwm ntev, thiab tsim tau.
Kev txhais ntawm galvanizing
Galvanizing, raws li lub npe qhia, yog txheej txheem txheej txheej ntawm cov hlau, alloys, thiab lwm yam ntaub ntawv nrog ib txheej ntawm zinc. Nws yog cov txheej txheem kho saum npoo uas muaj ob qho tib si zoo nkauj thiab xeb tiv taus. Vim zinc yog txheej txheej txheej txheej, nws tuaj yeem tiv thaiv lub hauv paus substrate.
Yog li ntawd, galvanizing feem ntau yog siv los txuas lub neej kev pab cuam ntawm cov khoom hlau. Cov txheej hlau no muaj ntau yam kev siv thiab tuaj yeem siv rau cov khoom siv hauv kev lag luam sib txawv xws li tsheb, hnub ci zog, hluav taws xob, thiab kev tsim kho.
Hom hlau twg tuaj yeem galvanized?
Cov hlau feem ntau haum rau galvanizing yog hlau thiab hlau. Txawm li cas los xij, lwm hom hlau kuj tuaj yeem ua galvanized. Feem ntau hais lus, ferrous hlau xws li cam khwb cia hlau, cam khwb cia hlau, malleable cam khwb cia hlau, kub- dov steel, thiab txias- dov steel tuaj yeem galvanized.
Ntawm qhov tod tes, muaj lwm cov ntaub ntawv uas tsis tuaj yeem tsim txheej txheej galvanized. Vim yog qhov tseem ceeb ntawm cov hlau hauv cov tshuaj tiv thaiv galvanizing, nws yog ib qho nyuaj rau cov hlau xws li tooj liab lossis txhuas los tsim cov txheej galvanized. Tsis tas li ntawd, txawm tias cov ntaub ntawv xws li chromium molybdenum steel tuaj yeem tsim cov txheej txheem, yuav muaj ntau qhov chaw raug thiab tsis tiav galvanized txheej.
Galvanizing txheej txheem: txheej txheej galvanized tiv thaiv lub hauv paus hlau li cas?
Galvanizing yog txheej txheem ntawm kev ntxiv txheej zinc rau saum npoo ntawm cov hlau xws li hlau thiab hlau. Muaj ntau txoj hauv kev rau galvanizing. Yog li ntawd, cov txheej txheem sib txawv nyob ntawm seb cov tshuab xaiv. Txawm li cas los xij, lawv txhua tus muaj cov ntsiab cai ntawm txheej zinc nyob ib puag ncig steel lossis hlau, uas tuaj yeem ua kua lossis hmoov.
Thaum zinc tau nkag mus rau hauv cov khoom, cov hlau hauv cov hlau substrate reacts nrog zinc los ua ib qho kev sib khi nruj nreem alloy txheej. Qhov no yog ib qho yooj yim txheej uas tsim ib txheej tuab tuab. Tag nrho cov txheej txheem tuaj yeem muab faib ua peb theem:
- Kev npaj ntawm hlau nto
- Galvanizing txheej txheem
- Kev kho deg tom qab galvanization
Feem ntau hais lus, galvanizing tiv thaiv cov hlau raws li cov hauv qab no:
- Cov txheej zinc tuaj yeem tiv thaiv cov hlau hauv paus los ntawm cov khoom siv corrosive xws li acids, caustic alkalis, thiab gases.
- Zinc yog cov khoom siv hlau. Thaum khawb cov txheej, zinc yooj yim txi nws cov anode los tiv thaiv lub hauv paus hlau los ntawm xeb.
- Tus nqi corrosion ntawm zinc yog nrawm dua li cov hlau hauv paus, ua rau nws yog ib txoj hauv kev zoo rau kev tiv thaiv cov hlau.
Txawm li cas los xij, kev npaj ua haujlwm thiab tom qab- txoj kev kho mob nyob rau theem pib yuav txiav txim siab qhov ua tau zoo ntawm cov txheej txheem galvanizing. Kev npaj ua haujlwm tsis txaus tuaj yeem cuam tshuam cov tshuaj tiv thaiv ntawm lub hauv paus hlau thiab cov hlau molten. Tsis tas li ntawd, kev tshaj tawm tsis txaus - kev ua haujlwm kuj tuaj yeem cuam tshuam rau qhov kawg ntawm cov txheej txheem galvanized. Qhov no yuav cuam tshuam rau tag nrho cov txiaj ntsig ntawm cov khoom.
Txoj kev sib txawv galvanizing
Muaj ntau txoj hauv kev rau galvanizing, txhua tus muaj nws tus yam ntxwv thiab qhov zoo. Cia peb saib hauv qab no.
kub-dip galvanizing
Raws li lub npe qhia, txoj kev no yuav immersing lub hauv paus hlau rau hauv ib lub pas dej zinc molten. Ua ntej galvanizing tiag tiag, tus kws kho tsheb yuav tsum ua cov tshuaj lom neeg lossis tshuaj ntxuav ntawm lub hauv paus hlau. Kev ntxuav yog ib qho kev npaj ua kom muaj kev sib txuas zoo ntawm cov hlau thiab zinc txheej. Tom qab ntxuav, ntws cov hlau kom tshem tawm cov oxides seem.
Tom qab ntawd muab tso rau hauv ib lub rhaub zinc da dej, feem ntau khaws cia ntawm qhov kub ntawm ib ncig ntawm 460 ° C. Thaum metallurgical bonding pib tsim ntawm zinc thiab hlau substrate, cov hlau substrate yuav hnov mob nrog oxygen los tsim zinc oxide tom qab raug tshem tawm ntawm cov yaj. Zinc oxide kuj reacts nrog carbon dioxide los tsim zinc carbonate, uas yog qhov kawg tiv thaiv txheej.
Kub dip galvanizing yog ib txoj hauv kev ceev thiab kev lag luam uas tuaj yeem siv rau ob qho tib si yooj yim thiab nyuaj hlau ntawv Cheebtsam. Txawm li cas los xij, yog tias ua haujlwm tsis raug, koj tuaj yeem pom tias cov txheej txheem ntawm cov hlau tsis sib xws.
Pre galvanized
Cov txheej txheem ua ntej galvanizing zoo ib yam li kub -dip galvanizing. Txawm li cas los xij, nws yog nqa tawm hauv thawj theem ntawm kev tsim khoom (steel zeb). Cov txheej txheem no suav nrog dov hlau daim hlau siv cov khoom siv kho tshuab lossis tshuaj ntxuav kom npaj rau galvanizing. Tom qab ntxuav, tus kws kho tsheb hla lub hauv paus hlau los ntawm lub pas dej zinc molten thiab tam sim ntawd dov nws dua.
Cov txheej txheem no ua kom ceev ceev galvanizing ntawm cov hlau coil loj, tsim cov txheej txheej ntau dua. Txawm li cas los xij, thaum pib tsim cov hlau ua ntej galvanized, tej zaum yuav muaj qee qhov chaw tsis muaj coated thiab raug. Piv txwv li, thaum txiav cov hlau phaj ntev ntev rau hauv cov khoom me me, qhov txiav ntug raug nthuav tawm vim tsis muaj galvanized txheej.
Electrogalvanizing
Tsis zoo li ob txoj kev sib tham saum toj no, electroplating tsis tas yuav siv cov zinc da dej molten. Ntawm qhov tsis sib xws, electroplating cuam tshuam nrog kev qhia tam sim no rau hauv cov tshuaj electrolyte thiab tom qab ntawd siv rau hauv substrate. Lub luag haujlwm ntawm tam sim no yog hloov zinc ions mus rau cov hlau substrate.
Cov txheej txheem ntawm galvanizing hlau no suav nrog txo cov nqi zinc ions zoo rau cov hlau zinc, uas tom qab ntawd muab tso rau hauv cov hlau zoo (steel lossis hlau). Cov neeg tsim khoom kuj tseem yuav ntxiv cov nplej zom kom ntseeg tau cov txheej zinc du ntawm cov hlau. Zoo li ua ntej galvanizing, electroplating galvanizing kuj tseem siv rau cov ntawv hlau ntev ntev hauv thawj theem ntawm cov txheej txheem tsim khoom.
Cov txheej txheem no tuaj yeem tsim cov txheej txheem meej thiab tsis sib xws ntawm cov hlau. Ntxiv mus, txheej txheej ntawm txoj kev no feem ntau yog nyias dua li ntawm kub -dip galvanizing.
Galvanizing txheej txheem
Galvanizing annealing yog kev sib xyaw ua ke ntawm kub -dip galvanizing thiab annealing txheej txheem, tsom rau txheej galvanized steel nrog txheej tshwj xeeb. Annealing thiab kub -dip txheej txheem yog nqa tawm tam sim ntawd los tsim ib tug matte grey nto.
Cov txheej txheem kub -dip feem ntau yog ua ua ntej cov hlau coated dhau los ntawm rab riam cua, uas pab tshem tawm cov zinc ntau dhau ntawm cov hlau. Tom qab ntawd, cov hlau yog luv luv rhuab nyob rau hauv ib lub qhov cub annealing ntawm qhov kub ntawm 500 mus rau 565 ° C, thiab zinc txheej thiab hlau txheej diffuse rau ib leeg, tsim zinc hlau alloy rau ntawm qhov chaw.
Cov ntawv hlau galvanized uas tsim los ntawm txoj kev no tuaj yeem tiv taus vuam zoo, thiab nws qhov chaw kuj tuaj yeem ua kom muaj xim zoo adhesion.
Ua Elec Barrel koj tus khub khib nyiab
Yog tias koj tsis paub meej txog yam khoom lossis kev kho saum npoo los xaiv rau koj cov khoom, thov cia Elec pab pawg pab koj. Peb muaj kev paub dav dav hauv kev kho saum npoo av thiab cog lus tias yuav muab cov khoom ntim khoom pov tseg zoo tshaj -. Tiv tauj peb hnub no rau cov kev pab cuam kev sib tham txog thoob khib nyiab.
