Cov txheej txheem tiv thaiv ntawm galvanized coils yog predicated raws li electrochemical zog ntawm zinc. Txij li zinc yog cov khoom siv hluav taws xob ntau dua li cov hlau, nws nyiam tshaj oxidation nyob rau hauv qhov chaw ntub dej, yog li tsim cov txheej tiv thaiv ntom ntom ntawm zinc oxide uas tiv thaiv corrosion los ntawm propagating mus rau hauv lub substrate.
Nyob ntawm cov txheej txheem tsim khoom tshwj xeeb, galvanized coils tuaj yeem muab faib ua ob hom: kub-dip galvanized thiab electro-galvanized. Kub-dip galvanizing cuam tshuam nrog rau cov khoom hauv da dej ntawm cov zinc molten ntawm qhov kub thiab txias, ua rau cov zinc txheej tuab (feem ntau ntau dua lossis sib npaug li 20 μm) uas yog qhov zoo- haum rau qhov chaw sab nraum zoov uas muaj corrosivity siab. Hauv qhov sib piv, electro-galvanizing siv cov zinc txheej los ntawm electrolytic deposition; thaum cov txheej txheem ua tau yog thinner (3-15 μm), nws nta ib qho smoother nto tiav, ua rau nws zoo tagnrho rau cov ntawv thov uas yuav tsum tau ua tiav. Tsis tas li ntawd, qee yam khoom lag luam suav nrog kev tiv thaiv- txheej ntiv tes- ua tiav los ntawm kev sib xyaw ua ke siv cov organic resins thiab silanes- uas tsim cov qauv microporous uas tsis yog tsuas yog tiv thaiv cov ntiv tes seem tab sis kuj txhim kho qhov adhesion ntawm txheej.