Tag nrho cov hlau reacts nrog oxygen nyob rau hauv cov huab cua los ua ib tug oxide zaj duab xis nyob rau saum npoo. Hmoov tsis zoo, cov hlau oxide tsim los ntawm cov pa roj carbon zoo tib yam txuas ntxiv oxidize, ua rau cov corrosion txuas ntxiv mus ntxiv thiab nws thiaj li tsim qhov. Koj tuaj yeem siv cov xim lossis oxidation-resistant hlau (xws li zinc, npib tsib xee, thiab chromium) rau electroplating los xyuas kom meej cov pa roj carbon steel, tab sis, raws li cov neeg paub, qhov kev tiv thaiv no tsuas yog ib zaj duab xis nyias. Yog tias cov txheej tiv thaiv puas lawm, cov hlau hauv qab no yuav pib xeb.
Kev tiv thaiv corrosion ntawm stainless hlau nyob ntawm chromium, tab sis vim tias chromium yog ib qho ntawm cov khoom siv hlau, txoj kev tiv thaiv txawv.
Thaum cov nyiaj ntxiv ntawm chromium nce mus txog 10.5%, atmospheric corrosion kuj ntawm cov hlau yog nce ntxiv, tab sis thaum cov ntsiab lus chromium siab dua, txawm tias qhov corrosion kuj tseem tuaj yeem txhim kho, nws tsis pom tseeb. Yog vim li cas yog tias thaum hlau yog alloyed nrog chromium, hom oxide nto hloov mus rau saum npoo oxide zoo ib yam li uas tsim los ntawm cov hlau ntshiab chromium. Qhov no nruj nreem adhered chromium-nplua nuj oxide tiv thaiv nto thiab tiv thaiv oxidation ntxiv. Cov oxide txheej no yog nyias nyias, thiab lub ntuj ci ntawm cov hlau nto tuaj yeem pom los ntawm nws, muab cov hlau tsis muaj qhov tshwj xeeb. Ntxiv mus, yog tias cov txheej txheej saum npoo raug puas lawm, cov hlau raug puas lawm yuav hnov mob nrog cov cua los kho nws tus kheej, rov ua qhov no" passivation zaj duab xis" thiab tseem ua lub luag haujlwm tiv thaiv.
Yog li ntawd, tag nrho cov hlau tsis muaj steel muaj qhov sib xws, uas yog, cov ntsiab lus chromium yog siab dua 10.5%.