Ob qhov nrov tshaj plaws ntawm galvanizing yog kub-dip galvanizing thiab electro-galvanizing. Ob txoj kev no, thiab lwm yam, tau tham hauv qab no. Paub seb hom galvanizing yuav xaiv yam twg yuav xav tau kev pab los ntawm tus kws tshaj lij.
1) Kub-dip galvanizing
Thaum lub sij hawm kub-dip galvanizing, cov hlau yog immersed nyob rau hauv ib tug kub zinc da dej ntawm ib ncig ntawm 450 degree. Thaum nws raug tshem tawm, lub coated nto reacts nrog oxygen los tsim zinc oxide, uas ces reacts nrog carbon dioxide los ua zinc carbonate. Ua ntej galvanizing, hlau yuav tsum tau ntxuav nrog ib tug caustic tov thiab ces pickled nyob rau hauv ib tug acidic tov; ammonium zinc chloride kuj tseem siv los tiv thaiv oxidation ntxov ntxov ntawm cov hlau ua ntej galvanizing.
2) Electro-galvanized
Electrogalvanizing ua ke nrog galvanizing nrog electroplating: ib qho hluav taws xob tam sim no dhau los ntawm zinc da dej nrog zinc anode thiab steel conductor. Cov txheej txheem tsim cov txheej txheej thinner dua li kub-dip galvanizing thiab tseem ua rau lub ntsej muag ci dua kom haum rau kev siv tshuaj pleev ib ce.
3) Zinc sherardizing
Daim ntawv no ntawm galvanizing mus los ntawm ntau lub npe: thermal diffusion galvanizing, vapor galvanizing, thiab qhuav galvanizing. Nws suav nrog cov khoom siv cua sov rau 500 degree hauv ib lub nruas rotating uas muaj zinc plua plav. Cov evaporated zinc diffuses rau cov hlau nto los ua ib qho kev sib txuas ruaj khov. Nws yog qhov zoo tagnrho rau qhov me me thiab qhov chaw uas yuav tsum tau coated rau sab hauv.
4) Galvanized
Galvanizing yog kev sib xyaw ua ke ntawm kub poob galvanizing thiab annealing. Cov txheej txheem kub-dip galvanizing ua tau zoo li qub, ua ntej cov hlau coated tau dhau los ntawm cov riam cua kom tshem tawm cov zinc ntau dhau. Cov hlau yog ces luv luv rhuab nyob rau hauv ib tug annealing rauv ntawm 500-565 degree interdiffuse cov hlau thiab zinc txheej thiab tsim ib tug zinc-hlau alloy txheej.