Thaum cov hlau thiab cov pa oxygen hauv cheeb tsam hnov mob, ib zaj duab xis oxide yog tsim rau ntawm qhov chaw. Cov hlau oxide tsim rau ntawm cov pa roj carbon tiag kuj tseem mus oxidize, lub xeb kom nthuav dav thiab thaum kawg daim ntawv no. Xim lossis oxidation-resistant co (xws li zinc, nickel thiab chromium) siv tau rau electroplating kom paub meej carbon cov hniav, tab sis, raws li paub, kev tiv thaiv no tsuas yog ib zaj duab xis nyias.
Yog hais tias tus txheej txheem tiv thaiv puas lawm, cov hlau hauv qab no pib xeb. Kev sib xyaw nrog kev sib xyaw ntawm cov hlau hoses nyob ntawm cov ntsiab lus ntawm chromium, thaum tus nqi ntawm chromium ntxiv rau 10.5%, qhov tsis ua hauj lwm ntawm cov hlau rau atmospheric corrosion ntau zog, tab sis thaum chromium cov ntsiab lus siab, txawm tias nws tseem txhim kho corrosion kuj, tab sis tsis pom tseeb. Yog vim li cas yog tias thaum cov hlau khib nyiab nrog chromium, hom oxide hloov mus ua ib qho dej oxide zoo ib yam li cov uas tsim ntawm cov chromium dawb huv.
Qhov no nruj nreem glued chromium-nplua nuj oxide tiv thaiv qhov chaw ntawm oxidation ntxiv. Cov txheej txheem oxide no tsis tshua muaj nyias, los ntawm qhov lus ci ntawm qhov tsis muaj hlau tsis muaj peev xwm pom tau, yog li ntawd cov hlau tsis muaj qhov sib txawv. Tshaj tawm, yog hais tias qhov saum npoo puas lawm, lub qhov dej tawm yuav raug kho nws tus kheej nrog rau qhov tshuaj tiv thaiv atmospheric, rov ua kom tau qhov "passage film", txuas ntxiv mus ua si
