Xim coated steel phaj kuj hu ua organic coated steel phajlos yog pre-coated steel phaj. Raws li txoj kev tsim khoom txuas ntxiv rau coils, xim hlau daim hlau tuaj yeem muab faib ua ob txoj hauv kev: electro-galvanized thiab kub-dip galvanized.
Nyob rau tib lub sijhawm, electro-galvanizing yog ib txoj hauv kev ua cov xim kub-plated- "txheej zinc hlau lossis zinc alloy" los ntawm electroplating.
Kub-dip galvanizing, tseem hu ua kub-dip galvanizing, yog dip cov khoom hlau uas xav tau kev saib xyuas rau hauv cov hlau zinc molten kom ua rau cov tsos ntawm cov txheej txheem hlau. Piv nrog electroplating, cov hlau kub-dip txheej yog thicker; nyob rau hauv tib ib puag ncig, nws muaj lub neej ntev.
Qhov corrosion ntawm kub-dip galvanized txheej ntawm cov hlau nto yog sib npaug ntawm cov zinc ntshiab. Lub corrosion ntawm zinc nyob rau hauv cov huab cua zoo ib yam li cov txheej txheem corrosion ntawm hlau nyob rau hauv atmospheric tej yam kev mob. Tshuaj oxidation corrosion tshwm sim, electrochemical corrosion tshwm sim ntawm zinc nto, thiab dej zaj duab xis condensation tshwm sim. Nyob rau hauv nruab nrab los yog tsis muaj zog acidic cua, cov khoom corrosion tsim los ntawm galvanized steel txheej yog insoluble compounds (zinc hydroxide, zinc oxide, thiab zinc carbonate). Cov khoom no yuav raug cais los ntawm kev tso tawm thiab tsim cov txheej nyias nyias.
Feem ntau nws tuaj yeem ncav cuag qhov tuab ntawm 8μm ". Cov yeeb yaj kiab no muaj qee qhov tuab, tab sis nws tsis yog yooj yim soluble hauv dej, thiab muaj zog adhesion. Yog li ntawd, nws tuaj yeem ua qhov cuam tshuam ntawm qhov chaw thiab cov ntawv galvanized. Tiv thaiv corrosion ntxiv. Lub galvanized txheej yog puas thaum lub sij hawm tu, thiab ib feem ntawm cov hlau nto yog raug rau cov cua.
Lub sijhawm no, zinc thiab hlau tsim ib lub roj teeb me me. Lub peev xwm ntawm zinc yog qhov qis dua li cov hlau. Raws li cov anode, zinc muaj qhov tshwj xeeb anode txij nkawm ntawm cov hlau phaj substrate kom tsis txhob muaj corrosion ntawm steel phaj.
Xim-coated board yog ib hom kua txheej, uas yog siv los ntxuav cov hlau los ntawm txhuam los yog cov menyuam. Tom qab cua sov thiab kho, cov xim pleev xim nrog tib lub thickness tuaj yeem tau.
Post lub sij hawm: Nov-02-2021