Kev ua vuamyog ib txoj kev ua hlau uas siv tau los txuas ntau hom hlau sib txawv. Thaum xaiv cov ntaub ntawv uas tuaj yeem vuam tau, yuav tsum xav txog cov yam xws li cov tshuaj lom neeg ntawm cov khoom siv, qhov chaw yaj, thiab kev ua kom sov. Cov ntaub ntawv uas siv tau uas tuaj yeem vuam tau suav nrog cov hlau carbon, hlau galvanized, hlau tsis xeb, txhuas thiab tooj liab.

Cov hlau carbon yog cov khoom siv vuam uas muaj peev xwm vuam tau zoo thiab muaj zog, ua rau nws haum rau ntau yam kev siv hauv kev lag luam. Cov hlau galvanized feem ntau siv rau kev tiv thaiv xeb thiab nws qhov kev vuam tau nyob ntawm qhov tuab thiab zoo ntawm cov txheej galvanized. Cov hlau tsis xeb muaj kev tiv thaiv xeb thiab haum rau cov chaw uas xav tau kev tiv thaiv xeb, tab sis kev vuam cov hlau tsis xeb xav tau kev tshwj xeeb.cov txheej txheem vuamthiab cov ntaub ntawv. Aluminium yog ib hom hlau uas tsis hnyav thiab muaj kev coj ua zoo rau cua sov thiab hluav taws xob, tab sis kev vuam aluminium xav tau cov txheej txheem vuam tshwj xeeb thiab cov ntaub ntawv sib xyaw. Tooj liab muaj kev coj ua zoo rau hluav taws xob thiab cua sov thiab tsim nyog rau cov teb hluav taws xob thiab kev sib pauv cua sov, tab sis kev vuam tooj liab xav tau kev xav txog cov teeb meem oxidation.

Thaum xaiv cov ntaub ntawv vuam, cov yam ntxwv ntawm cov khoom siv, qhov chaw siv thiab cov txheej txheem vuam yuav tsum tau xav txog kom ntseeg tau tias qhov zoo thiab kev ua tau zoo ntawm qhov kev sib txuas vuam. Kev vuam yog ib qho txheej txheem nyuaj uas yuav tsum tau xav txog ntau yam ntawm kev xaiv cov khoom siv, cov txheej txheem vuam thiab cov txheej txheem ua haujlwm kom ntseeg tau tias qhov zoo thiab kev ntseeg tau ntawm qhov kawg vuam sib koom ua ke.