Zinc yog yooj yim soluble nyob rau hauv ob qho tib si acids thiab alkalis, tau txais nws lub npe ntawm amphoteric hlau. Zinc hloov pauv me ntsis hauv huab cua qhuav tab sis tsim cov txheej txheem ntom ntom ntawm zinc carbonate ntawm nws qhov chaw hauv huab cua ntub. Nyob rau hauv ib puag ncig uas muaj sulfur dioxide, hydrogen sulfide, thiab cov huab cua hauv hiav txwv, zinc nthuav tawm tsis zoo corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv high-temperature, high humidity ib puag ncig uas muaj cov organic acids, uas zinc coatings yog heev raug rau corrosion.
Kub-dip galvanized kav yog tsim los ntawm reacting molten hlau nrog ib tug hlau substrate los tsim ib tug alloy txheej, li no integrating substrate thiab txheej. Cov txheej txheem ntawm cov kav dej kub-dip galvanized pib nrog pickling cov kav hlau kom tshem tawm cov hlau oxide ntawm lawv qhov chaw. Tom qab pickling, cov kav dej raug ntxuav hauv lub tank uas muaj cov tshuaj aqueous ntawm ammonium chloride, zinc chloride, los yog sib tov ntawm ob qho tib si, thiab tom qab ntawd xa mus rau hauv da dej kub-dip galvanizing. Kub-dip galvanizing muaj qhov zoo xws li txheej txheej, muaj zog adhesion, thiab lub neej ua haujlwm ntev. Hauv cov cheeb tsam sab qaum teb, feem ntau siv zinc-coated strip dov thiab zinc ntxiv txheej txheem.
Cov kav dej kub-dip galvanized steel kav muaj kev cuam tshuam lub cev thiab tshuaj lom neeg ntawm cov yeeb nkab steel substrate thiab molten galvanizing tov, uas ua rau tsim cov corrosion-resistant, structurally ntom zinc-hlau alloy txheej. Cov txheej txheej hlau no sib txuas ua ke nrog cov zinc txheej ntshiab thiab cov yeeb nkab steel substrate, imparting exceptional corrosion kuj.
Txhawm rau txhim kho corrosion kuj ntawm cov kav hlau, lawv yog galvanized, nrog ob txoj hauv kev tseem ceeb: kub-dip galvanizing thiab electroplating. Kub-dip galvanizing ua rau cov zinc txheej tuab, thaum electroplating yog tus nqi zoo tab sis tuaj yeem ua rau qhov tsis zoo. Oxygen-blown welded kav, feem ntau me me-inch welded steel kav xws li qhov loj ntawm 3/8 mus rau 2 ntiv tes, yog siv rau steelmaking oxygen tshuab. Ua los ntawm steel strips xws li 08, 10, 15, 20, los yog 195-Q235 qib, qee cov kav dej tau txais kev kho aluminizing zoo rau kev tiv thaiv corrosion.
Txheej txheem ntau lawm:
Galvanized sawb → Uncoiling → Stretching → Dov rau hauv cov yeeb nkab → Vuam → Tshem tawm cov caws pliav → Passivation thiab yaug → Zinc replenishing → Sizing → Typing thiab labeling → Txiav → Ntim → Qhuav → Weighing.
