1. Lub sij hawm tiv thaiv xeb zoo li cas rau galvanized coils nyob rau hauv qhov chaw ntub dej thiab los nag?
Nyob rau hauv ib qho chaw ntub dej thiab los nag, lub sijhawm tiv thaiv xeb rau cov coils zoo tib yam feem ntau yog 8 txog 12 xyoo. Nws yuav tsum raug sau tseg tias 8 xyoo yog qhov kev txwv qis qis, thaum 12 xyoo yog qhov txwv siab tshaj nyob rau hauv cov txheej txheem zoo thiab cov cheeb tsam me me. Yog tias qhov chaw khaws cia lossis kev siv ib puag ncig hnyav heev, xws li cov av noo siab, qhov cua tsis zoo, thiab kev sib xyaw ua ke, lub sijhawm no yuav raug luv, nrog qee cov ntaub ntawv qhia tias nws tsuas yog 5 txog 10 xyoo. Yog tias cov txheej txheem galvanized coil raug tsis zoo lossis qhov chaw cia khoom hnyav tshwj xeeb, xeb kuj tseem tuaj yeem tshwm sim hauv tsawg li 3 txog 5 lub hlis.
2.Dab tsi yog qhov tseem ceeb uas tuaj yeem ua kom ntev lossis luv lub sijhawm tiv thaiv xeb?
Qhov ntev ntawm lub sij hawm tiv thaiv xeb yog txiav txim siab los ntawm cov khoom nws tus kheej thiab ib puag ncig. Cov yam tseem ceeb yog raws li nram no:
Txheej thickness: Qhov no yog qhov kev txiav txim siab thiab qhov tseem ceeb tshaj plaws cuam tshuam. Lub thicker zinc txheej, ntau "sacrificial anodes" tuaj yeem noj, ib txwm ua rau lub sijhawm tiv thaiv xeb ntev dua.
Qhov tseeb cov av noo thiab cov pa phem: Cov av noo yooj yim ua rau muaj kev sib tw. Yog tias ambient humidity tsis tu ncua siab tshaj 85%, oxidation tus nqi ntawm zinc txheej yuav nrawm heev. Yog tias qhov no tau ua ke nrog sulfides los ntawm cov khoom siv khib nyiab lossis ntsev los ntawm cov ntug dej hiav txwv, cov txheej txheem corrosion yuav nrawm dua, ua rau lub neej luv luv.
Kev kho deg: Siab-kev kho mob zoo tuaj yeem txhim kho kev tiv thaiv xeb ntawm cov ntawv galvanized ob peb zaug. Passivation treatment forms a dense protective film on the surface, effectively delaying corrosion.
Qhov sib txawv ntawm cov txheej txheem galvanizing: Cov txheej txheem sib txawv ua rau cov txheej txheem txheej txheej sib txawv, ua rau muaj kev sib txawv ntawm kev tiv thaiv corrosion. Piv txwv li, kub-dip galvanizing (thick txheej, muaj zog adhesion) feem ntau ua tau zoo dua li electro-galvanizing (thin txheej).
3. Ntev npaum li cas cov galvanized coils tuaj yeem khaws cia rau hauv lub tsev muag khoom ntub dej tsis muaj kev puas tsuaj?
Nyob rau hauv ib puag ncig warehouse, "lub sij hawm tiv thaiv xeb" feem ntau yog hais txog kev tiv thaiv kev tsim ntawm "dawb xeb." Vim yog lub Hoobkas cov khoom lag luam thiab cov khoom xa tuaj, qhov ntev - lub sij hawm cia ntawm galvanized coils feem ntau tsis pom zoo.
Feem ntau cov kev pom zoo ntawm kev lag luam thiab cov chaw tsim khoom pom zoo qhia tias ua tiav cov galvanized coils yuav tsum tau muab cia rau hauv lub tsev rau ntau tshaj peb lub hlis (kwv yees li 90 hnub). Qhov no yog kom tsis txhob muaj teeb meem zoo xws li oxidation thiab xeb dawb los ntawm kev cia ntev ntev. Nyob rau hauv cov xwm txheej zoo, yog tias lub tsev khaws khoom tuaj yeem tswj cov av qis dua 70% thiab tswj qhov cua kom zoo, cov khoom lag luam galvanized khaws cia kom zoo tuaj yeem nyob twj ywm mus txog 18 lub hlis, ncua lawv txoj sia los ntawm 3 mus rau 5 xyoo piv rau kev khaws cia tsis tu ncua. Txawm li cas los xij, nyob rau hauv cov khoom lag luam cov khoom lag luam, ua raws li lub hauv paus ntsiab lus ntawm "siv hauv peb lub hlis" feem ntau muaj kev nyab xeeb dua.
4. Yog tias qhov chaw khaws cia hauv qhov chaw ntub dej tsis tuaj yeem zam tau, txoj hauv kev twg tuaj yeem txuas ntxiv lub sijhawm xeb - pov thawj?
Yog tias muaj qee yam txwv, cov kev cuam tshuam hauv qab no tuaj yeem ua haujlwm kom txuas ntxiv xeb - lub sijhawm pov thawj:
Tswj qhov chaw khaws cia: Cov tsev khaws khoom khaws cia galvanized coils yuav tsum qhuav thiab zoo -ventilated, nrog cov txheeb ze av noo zoo tswj hauv qab 70%, qhov kub thiab txias tswj ntawm 10-30 degree, thiab cais tawm ntawm acids, alkalis, thiab ntsev. Thaum khaws cia, nco ntsoov siv ntoo lossis roj hmab mats, tsa lawv tsawg kawg 15 cm saum toj no hauv av kom tsis txhob muaj kev sib cuag ncaj qha nrog qhov chaw ntub dej.
Xaiv cov txheej txheej galvanized tuab dua thiab cov ntaub ntawv siab dua: Ua kom "kev nyab xeeb margin" thaum xaiv cov khoom. Rau qhov chaw ntub dej, cov kws tshaj lij hauv kev lag luam pom zoo xaiv cov khoom siv nrog txheej txheej galvanized ntawm 150 txog 200 microns lossis ntau dua kom ntseeg tau tias lub neej ua haujlwm 15- xyoo. Xwb, xav txog kev siv ntau dua -kev ua tau zoo zinc- aluminium-magnesium alloy coatings, uas muaj kev txhim kho corrosion kuj zoo dua piv rau cov zinc coatings.
"Zinc plating + txheej" dual kev tiv thaiv: Hauv kev thov cov ntawv thov, txheej huab cua- cov xim pleev xim lossis PVC zaj duab xis tuaj yeem siv rau zinc plating nto los ua "zinc txheej + txheej" dual kev tiv thaiv, uas tuaj yeem txhim kho kev tiv thaiv xeb tag nrho.
5. Puas muaj peev xwm kho tau ib zaug galvanized coils xeb lossis txawm tias ua tsis tiav?
Kev kho yog ua tau, tab sis nws nyob ntawm seb qhov twg thiab qhov chaw ntawm qhov ua tsis tiav.
Yog tias nws tsuas yog "dawb xeb" (thaum ntxov zinc ntsev corrosion): Qhov no tshwm sim nyob rau hauv qhov chaw kaw los yog ntub dej thiab feem ntau tsuas yog qhov teeb meem tshuaj pleev ib ce. Koj tuaj yeem ntxuav cov xeb dawb nrog cov ntaub mos muag thiab dej los yog ib lub tshuab ntxuav tshwj xeeb, tom qab ntawd ua kom lub ntsej muag qhuav. Yog tias qhov xwm txheej hnyav dua, koj tuaj yeem so nws nrog 5% acetic acid tov, ces yaug nrog dej thiab qhuav kom huv si.
Yog tias "liab xeb" tshwm sim (cov hlau substrate tau pib corrode): Qhov no qhia tau hais tias cov txheej galvanized tau ua tsis tiav. Qhov chaw xeb yuav tsum tau muab tso rau hauv av tam sim ntawd kom tshem tawm cov xeb, tom qab ntawd txau nrog lub siab -zinc- cov ntsiab lus kho xim (xws li cov xim txias galvanizing) los kho nws cov cathodic tiv thaiv.
Yog hais tias muaj qhov dav thiab hnyav corrosion, thiab cov qauv tseem ceeb tau ua tsis tiav: Thaum lub galvanized coil lub zog ntawm cov txheej txheem tsis tuaj yeem ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb vim ntev - lub sij hawm corrosion hnyav, kev kho yooj yim tsis txaus. Ua kom tiav kev hloov pauv lossis kev tshaj lij regalvanizing yuav tsum tau txiav txim siab, tab sis regalvanizing yog kim thiab yuav tsum tau siv tshuab siab heev.