Thaum cov kav hlau yog coated nrog cov kuab tshuaj aqueous thiab qhuav, yog tias lawv tsis tau rhuab mus rau qhov yuav tsum tau ziab kom qhuav kub rau kub-dip galvanizing thiab muaj cov dej noo ntau dhau, lawv suav hais tias tsis txaus. Qhov tshwm sim ntawm kev ziab tsis txaus tuaj yeem ua rau ntau yam teeb meem:
(1) Kev ziab tsis zoo tsis tuaj yeem tshem tawm cov roj hydrogen uas tsim tawm thaum lub sij hawm acid pickling ntawm cov yeeb nkab steel hlau substrate, cuam tshuam rau qhov zoo ntawm galvanized txheej.
(2) Nws ua rau tsis tsim nyog corrosion ntawm cov yeeb nkab steel hlau substrate, uas ua rau tsim cov hlau chloride, uas ua rau zinc noj thiab roughens lub galvanized txheej.
(3) Cov khoom siv txhuas hauv zinc da dej tau dhau los ua cov oxidation hnyav vim cov dej noo, ua rau muaj qhov tseem ceeb ntawm aluminium oxide (Al₂O₃), nkim txhuas thiab ua kom hnyav hnyav.
(4) Thaum noo noo ntsib cov kua zinc kub, nws hloov mus rau hauv dej vapor, hydrogen, thiab oxygen sai, ua rau cov kua zinc hauv cov yeeb nkab steel eject hnyav los ntawm qhov raug, ua rau muaj kev phom sij, nkim zinc, thiab tsim cov chaw tsis muaj coated.
(5) Cov dej vapor tsim thaum ya raws ntsib cov kua zinc muaj zog oxidizes zinc ntawm 350 degree. Txij li thaum zinc da dej nws tus kheej ua haujlwm nyob rau hauv qhov kub ntawm 470-500 degree, oxidation tseem khaus, ua rau zinc noj thiab ua rau cov txheej txheem tsis zoo galvanized.
