Galvanized steel kav yog dav siv nyob rau hauv kev tsim kho, kav dej, thiab kev lag luam kev siv vim lawv corrosion-cov khoom tiv taus. Tab sis cov lus nug tseem: yuav galvanized steel yeeb nkab nws thiaj li xeb? Cov lus teb tsis yog ib qho yooj yim yog los yog tsis yog - nws nyob ntawm ntau yam xws li ib puag ncig, zoo ntawm galvanization, thiab tu. Kab lus no tshawb txog qhov tseeb ntawm galvanized steel corrosion.
Nkag siab Galvanized Steel
Galvanized steel kav yog cov kav hlau tsis tu ncua uas tau dhau los ua cov txheej txheem zinc txheej los tiv thaiv corrosion. Qhov no feem ntau ua tiav los ntawm:
Kub-dip galvanization: Cov yeeb nkab yog immersed nyob rau hauv molten zinc (nyob ib ncig ntawm 450℃/ 842℃F), tsim ib tug tuab, check txheej
Hluav taws xob-galvanization: Ib txheej txheej zinc txheej siv los ntawm electroplating
Cov zinc ua raws li kev txi anode, txhais tau tias nws yuav corrode ua ntej cov hlau hauv qab, muab kev tiv thaiv txuas ntxiv txawm tias cov txheej yog khawb.
Cov yam ntxwv cuam tshuam rau kev txhim kho xeb hauv cov kav dej galvanized
1. Cov xwm txheej ib puag ncig
Humidity thiab noo noo: Kev raug mob tas li ua kom zinc depletion
Ntsev raug: Cov ntug hiav txwv dej lossis txoj kev ntsev tuaj yeem txo txoj sia ntawm 50% lossis ntau dua
Kev lag luam cua: Tshuaj lom neeg ua kom muaj zog corrosion
Av tej yam kev mob: Cov kav dej faus ntsej muag sib txawv ntawm kev xeb raws li av pH thiab kev tiv thaiv
2. Zoo ntawm Galvanization
Txheej thickness: Kub-dip feem ntau 45-80 microns; electro-galvanized 5-25 microns
Txheej uniformity: Kev tsis zoo ua rau cov chaw tsis muaj zog
Adhesion zoo: Cov adhesion tsis zoo ua rau lub ntsej muag ua ntej
3. Mechanical Factors
Kev puas tsuaj: Lub cev hnav tshem tawm cov zinc tiv thaiv
Flexing / kev nyuaj siab: tuaj yeem ua rau micro- tawg hauv txheej
Kev puas tsuaj: Kev tuav tsis raug thaum lub sijhawm teeb tsa
Corrosion ncua sij hawm ntawm Galvanized kav
Theem 1: Kev Tiv Thaiv Zinc (feem ntau 10-50 xyoo)
Lub zinc txheej sacrificially corrodes thaum tiv thaiv cov hlau. Cov xeb dawb (zinc hydroxide) tuaj yeem tsim tab sis tsis cuam tshuam txog kev ua haujlwm.
Theem 2: Zinc Depletion thiab Initial Steel Corrosion
Thaum zinc depleted nyob rau hauv ib cheeb tsam, liab xeb (hlau oxide) pib tsim. Localized pitting tshwm sim.
Theem 3: Advanced Corrosion
Rust kis, uas yuav ua rau:
Txo cov yeeb nkab txoj kab uas hla ntawm scaling
Cov chaw tsis muaj zog tuaj yeem xau
Ua kom tiav cov yeeb nkab tsis ua hauj lwm hauv cov xwm txheej hnyav
Sib piv Corrosion Resistance
| Khoom siv | Hom Lifespan nyob rau hauv ib puag ncig me me | Lifespan nyob rau hauv ntug dej hiav txwv/Industrial Areas |
|---|---|---|
| Kub-dip galvanized steel | 40-70 xyoo | 15-30 xyoo |
| Electro{0}}galvanized hlau | 10-25 xyoo | 5-12 xyoos |
Lus Nug: Puas yog Galvanized Steel Yeeb Nkab xeb?
Yog lawm, galvanized steel kav yuav kawg xeb, tab sis cov txheej txheem yog qeeb qeeb piv rau cov hlau tsis kho. Nrog rau qhov tshwj xeeb tsim nyog rau ib puag ncig thiab kev saib xyuas txaus, cov kav dej galvanized tuaj yeem muab ntau xyoo ntawm kev pabcuam txhim khu kev qha. Kev nkag siab txog yam uas cuam tshuam rau kev xeb tso cai rau kev xaiv cov khoom zoo dua thiab kev saib xyuas zoo, ua kom lub neej ntev tshaj plaws ntawm cov yeeb nkab steel galvanized.
