Nyob rau hauv niaj hnub kev lag luam vaj tse, steel yog ib qho tseem ceeb indispensable khoom. Txawm li cas los xij, qhov teeb meem ntawm corrosion tuaj yeem ua rau poob nyiaj txiag loj thiab muaj kev nyab xeeb. Nws yog ib qho tseem ceeb rau cov hlau kom tswj tau cov khoom siv kho tshuab zoo heev thaum tiv thaiv kev yaig ntawm qhov chaw hnyav. Yog li, Galvanized Steel Sheet tau los ua.
I. Galvanized Steel Sheet yog dab tsi
Galvanized Steel Sheet hais txog ib daim ntawv nyias ntawm cov hlau nrog ib txheej ntawm zinc plated ntawm nws qhov chaw. Qhov no "steel + zinc" composite qauv zoo kawg nkaus ua ke lub zog ntawm cov hlau thiab corrosion kuj ntawm zinc. Galvanized Steel Sheet yog cov khoom siv dav siv los tiv thaiv metallurgical khoom.
II. Txoj Cai Tiv Thaiv Corrosion ntawm Galvanization: Dual Protection Mechanism
1. Kev Tiv Thaiv Kev Tiv Thaiv
Cov zinc txheej yuav tsim kom nruj thiab ruaj khov alkaline carbonate zinc txheej nyob rau hauv ib puag ncig atmospheric, uas tuaj yeem tiv thaiv cov hlau sab hauv los ntawm kev sib cuag nrog oxygen, noo noo thiab corrosive media, ua lub luag haujlwm ntawm lub cev tiv thaiv.
2. Kev tiv thaiv Cathodic
Qhov no yog qhov tshwj xeeb tshaj plaws thiab cov txiaj ntsig tseem ceeb ntawm galvanization. Cov txheej txheem electrode muaj peev xwm ntawm zinc yog qhov tsis zoo dua li cov hlau. Yog li ntawd, thaum lub txheej tshiab yog khawb los yog ib feem puas, zinc, raws li lub anode, yuav yaj ua ntej, thiab los ntawm electrochemical kev txiav txim, tiv thaiv cov hlau substrate li cathode.
Nws yog precisely no dual kev tiv thaiv mechanism uas enables lub neej kev pab cuam ntawm Galvanized Steel Sheet yuav ncua, ua rau nws yog qhov zoo tshaj plaws kev xaiv rau steel qauv nyob rau hauv sab nraum zoov thiab hnyav ib puag ncig.
III. Cov txheej txheem ntau lawm ntawm Galvanized Steel Sheet
1. Kub-Dip Galvanizing Method
Kub-dip galvanizing yuav immersing lub pre-kho steel ntawv rau hauv molten zinc kua, yog li tsim ib txheej zinc rau ntawm daim ntawv. Qhov no yog tam sim no txoj kev tsim khoom tseem ceeb tshaj plaws hauv kev ua lag luam, suav rau feem ntau ntawm Galvanized Steel Sheets.
- Zinc txheej yog tuab, feem ntau yog li ntawm 60 mus rau 300 g / ㎡ (ib sab).
- Cov txheej zinc tuaj yeem tsim cov hlau nplaum nrog cov hlau substrate, muab cov adhesion muaj zog.
- Kev tiv thaiv corrosion yog zoo heev, ua rau nws haum rau sab nraum zoov thiab hnyav ib puag ncig.
- Ntau cov zinc grain nto kuj tuaj yeem tsim tau.
2. Electro-Txoj kev galvanizing
Electro-galvanizing siv cov hauv paus ntsiab lus ntawm electrochemistry los tso zinc ions rau ntawm cov ntawv hlau los ntawm electrolysis hauv cov kua qaub.
- Cov txheej zinc yog thinner, feem ntau yog li ntawm 10 mus rau 50 g / ㎡ (ib sab).
- Lub thickness ntawm txheej yog sib xws, thiab qhov chaw yog du thiab tiaj tus.
- Tsis muaj zinc nplej tau tsim, thiab cov tsos yuav zoo nkauj dua tom qab pleev xim.
- Tib -sab thiab ob - sab sib txawv tuaj yeem ua tiav.
- Cov khoom qub qub ntawm cov ntawv hlau tseem tsis hloov pauv.
IV. Yam tseem ceeb cuam tshuam rau Corrosion Resistance
1. Txheej Thickness: Direct Determining Factor
Cov kev tshawb fawb pom tau hais tias rau txhua txhua 0.01 hli nce nyob rau hauv txheej thickness, lub sij hawm corrosion kuj yuav txuas ntxiv los ntawm 2-4 xyoo.
- Lub teeb txheej: Haum rau qhov chaw qhuav hauv tsev
- Nruab nrab txheej: haum rau sab nraum zoov ib puag ncig
- Hnyav txheej: Haum rau qhov chaw muaj corrosive siab, xws li cov ntug hiav txwv dej thiab thaj chaw muaj kuab lom
2. Txheej hom
Nrog rau kev txhim kho ntawm cov cuab yeej siv hlau hlau, Galvanized Steel Sheet tau maj mam qhia ntau yam khoom siv hlau txheej.
- Ntshiab zinc txheej: tsoos kub-dip galvanizing khoom, muab kev tiv thaiv dual
- Zinc-5% aluminium- tsis tshua muaj lub ntiaj teb alloy: Lub neej corrosion kuj nyob rau hauv cov tshuaj tsuag ntsev yog 2-3 npaug ntawm cov ntawv kub-dip galvanized steel ntawv.
- Aluminium-zinc txheej: Corrosion kuj lub neej yog 2-4 npaug ntawm cov Galvanized Steel Sheet zoo tib yam
3. Kev kho deg
- Kev kho mob Passivation: Ua ib zaj duab xis passivation ntawm zinc txheej txheej los ntawm kev kho tshuaj, txo "dawb xeb" thaum thauj thiab khaws cia
- Kev kho roj txheej: Txheej nrog cov tshuaj tiv thaiv- xeb tuaj yeem muab kev tiv thaiv ib ntus
- Resistant rau kev kho cov ntiv tes: tuaj yeem ua rau cov hws stains tuaj yeem ua rau lub hauv paus ntawm passivation, haum rau ntau yam khoom siv hluav taws xob.
- Kev kho tus kheej-lubrication: tuaj yeem txhim kho kev ua haujlwm ntawm steel phaj thaum muab kev tiv thaiv corrosion.
V. Corrosion Resistance Performance ntawm Galvanized Steel Sheet nyob rau hauv ntau qhov chaw siv
1. Inland Ordinary Atmospheric Ib puag ncig
Cov huab cua hauv av muaj cov av noo me ntsis thiab ob peb cov pa phem. Zinc txheej txheej tuaj yeem yooj yim tsim cov yeeb yaj kiab ruaj khov, tiv thaiv corrosion, thiab kev pabcuam lub neej tuaj yeem ncav cuag 20-30 xyoo.
2. ntug hiav txwv siab -Ntswj Txau ib puag ncig
Cov huab cua ntawm ntug dej hiav txwv muaj ntau cov ntsev, ua kom cov corrosiveness rau cov khoom. Yog li ntawd, aluminized zinc lossis zinc-aluminium-magnesium alloy coatings muaj qhov zoo dua, nrog rau lub neej kev pab ntawm 40-50 xyoo.
3. Muaj kuab paug ib puag ncig
Lub acidic gases nyob rau hauv lub industrial cheeb tsam yuav ceev cov corrosion ntawm hlau. Kev tiv thaiv corrosion ntawm aluminized zinc alloy steel daim hlau yog nce los ntawm 2-4 zaug piv rau cov ntawv zoo tib yam Galvanized Steel Sheets.
4. Kev tiv thaiv corrosion rau qhov txiav thiab ua haujlwm
Tom qab cov hlau raug txiav, xuas nrig ntaus, lossis khoov, cov npoo thiab qhov chaw deformed yuav dhau los ua cov ntsiab lus tsis muaj zog rau corrosion. Yog li ntawd, sib txawv coated alloys yuav tsum tau siv los tiv thaiv corrosion.
VI. Yuav ua li cas kom ntseeg tau qhov Corrosion Resistance ntawm Galvanized Steel Sheet
1. Txheej Thickness Ntsuas
Siv X- txoj kab hluav taws xob fluorescence lossis ntsuas qhov sib nqus los ntsuas qhov tuab ntawm zinc txheej kom ntseeg tau tias nws ua tau raws li tus qauv yuav tsum tau ua.
2. Kev Xeem Adhesion
Ua 180℃dabtsi yog khoov kuaj lossis kuaj kos los ntsuas qhov adhesion ntawm txheej. Raws li tus qauv, cov txheej yuav tsum tsis txhob tev tawm tom qab khoov, thiab kev kuaj kos yuav tsum nyob ntawm ISO2409 tus qauv qib 0-1.
3. Tshuaj tsuag ntsev
Qhov no yog txoj hauv kev tseem ceeb rau kev ntsuas qhov corrosion kuj ntawm Galvanized Steel Sheet. High- zoo alloy- cov khoom siv coated tuaj yeem tiv taus cov tshuaj ntsev ntsev ntev dua.
4. Kev tshuaj xyuas tshuaj lom neeg
Lub purity ntawm zinc ingot thiab cov ntsiab lus ntawm cov ntsiab lus alloy yuav ncaj qha cuam tshuam rau txheej txheej.
Kev tiv thaiv corrosion ntawm Galvanized Steel Sheet yog ntaus nqi los ntawm kev tsim cov ntaub ntawv tshawb fawb thiab kev tswj xyuas cov txheej txheem zoo. Rau cov neeg siv khoom, xaiv Galvanized Steel Sheet zoo ib yam li xaiv qhov ntev - tiv thaiv kev daws teeb meem.
Peb tau cog lus tias yuav muab cov- Galvanized Steel Sheets zoo thiab cov kev pabcuam kev tshaj lij. Yog tias koj txaus siab rau Galvanized Steel Sheets lossis muaj lus nug,thov koj xav tiv tauj peb txhua lub sijhawm!