1.Vim li cas cov chaw ntug dej hiav txwv tsis zoo rau galvanized coils?
High Chloride Ions:
Qhov no yog qhov tseem ceeb tshaj plaws thiab ua rau tuag taus. Hiav txwv breezes thiab hiav txwv pos huab muaj cov ntsev ntau ntau, feem ntau yog sodium chloride.
Chloride ions muaj zog heev nkag mus; lawv tuaj yeem rhuav tshem qhov ruaj khov, tiv thaiv yooj yim zinc carbonate passivation zaj duab xis tsim rau ntawm zinc nto.
Chloride ions hnov mob nrog zinc los tsim cov zinc chloride soluble, uas tsis tsuas yog ua tsis tau rau txheej tiv thaiv tab sis kuj ua kom cov zinc noj. Cov txheej txheem no, hu ua pitting corrosion, sai sai nkag mus rau zinc txheej hauv zos.
Sustained High Humidity:
Cov dej noo nyob hauv huab cua yog qhov tsim nyog rau electrochemical corrosion. Cov av noo siab nyob rau hauv cov ntug dej hiav txwv txhais tau hais tias nyias nyias electrolyte zaj duab xis yog yooj yim dua tsim thiab khaws cia ntawm cov hlau, muab cov xwm txheej tas mus li rau kev tsim cov hlwb corrosion.
Kub kub:
Ua kom kub ceev ceev tus nqi ntawm tag nrho cov tshuaj tiv thaiv, nrog rau corrosion. Kev kub siab nyob rau hauv ntau qhov chaw ntug hiav txwv ntxiv ua kom cov txheej txheem corrosion.
2.Electro-galvanized coils ua haujlwm li cas?
Qhov xwm txheej yog qhov zoo tshaj plaws. Vim tias nws cov zinc txheej feem ntau nyias nyias (feem ntau 5-20µm), nyob rau hauv qhov hnyav ntawm qhov chaw ntug dej hiav txwv, zinc txheej yuav tau noj tag nrho hauv 1-3 xyoos lossis tsawg dua, thiab tom qab ntawd cov hlau substrate yuav xeb sai.
3.Qhov kub ntawm -dip galvanized kauj zoo li cas?
Thaum ua tau zoo dua, nws lub neej ntev tseem txo qis. Kub-dip galvanized zinc txheej yog tuab dua (feem ntau 50-200µm lossis ntau dua), tso cai rau kev txi ntau dua zinc.
Nyob rau hauv ntug dej hiav txwv ib puag ncig, nws lifespan yuav luv luv los ntawm kaum xyoo hauv av mus rau 5-15 xyoo (nyob ntawm zinc txheej thickness thiab ib puag ncig hnyav).
Nws kuj tau dhau los ntawm cov txheej txheem kev tshem tawm sai sai, tab sis vim nws cov zinc txheej tuab, nws tuaj yeem kav ntev dua.
4.Yuav ua li cas kom ntev lub neej kev pab cuam ntawm cov khoom siv nyob rau hauv ntug hiav txwv dej?
Xaiv cov txheej tuab: Qhia meej kom siv cov kub kub-dip galvanized coils thiab xaiv cov txheej txheem zinc txheej hnyav dua (piv txwv li, Ntau dua lossis sib npaug li 180g / m², lossis txawm tias 275g / m²). Qhov no yog lub hauv paus zoo tshaj plaws.
Siv cov txheej txheej saum npoo (qhov kev xaiv zoo tshaj): Siv cov xim los yog hmoov txheej txheej txheej galvanized. Qhov no sib npaug rau "ob chav pov hwm."
Lub hauv paus ntsiab lus: Cov xim los yog yas txheej lub cev cais cov zinc txheej los ntawm chloride ions thiab ya raws.
Lus Cim: Nws yog ib qho tseem ceeb uas yuav tau xaiv cov xim uas haum rau cov galvanized substrate nrog cov ntsev tsuag zoo heev thiab ua kom zoo pretreatment (xws li, phosphating) kom lav txheej adhesion.
Xaiv qib siab -kev ua tau zoo alloy txheej cov ntaub ntawv:
Aluminium-zinc alloy coatings: xws li Galvalume (55% txhuas, 43.4% zinc, 1.6% silicon). Aluminium ua ib qho ruaj khov alumina tiv thaiv zaj duab xis rau ntawm qhov chaw, nrog kev tiv thaiv zoo tshaj rau chloride ion corrosion piv rau cov xim zinc txheej.
Zinc-aluminium-magnesium alloy txheej: Qhov no yog ib yam tshiab ntawm cov khoom uas nws corrosion kuj, tshwj xeeb tshaj yog ntug kev tiv thaiv, yog ho zoo dua piv rau tsoos kub-dip galvanizing, thiab ua tau zoo nyob rau hauv ib puag ncig hnyav.
5.Hauv thaj chaw ntug dej hiav txwv nrog cov av noo siab, dab tsi yuav tsum tau muab qhov tseem ceeb yog tias nws yuav tsum tau siv?
Kev sib xyaw ua ke ntawm kub-dip galvanized coils thiab txheej txheej, los yog ncaj qha siv aluminium-zinc alloy/zinc{2}}aluminium-magnesium alloy coated coils.
Thaum txiav txim siab, nws yog ib qho tseem ceeb uas yuav tsum xaiv cov khoom tsim nyog tshaj plaws thiab kev tiv thaiv kev daws teeb meem raws li qhov project tsim lub neej, cov nqi siv nyiaj, thiab kev xav kom zoo nkauj.