Stainless hlau tsis yooj yim corrode, xeb lossis stain nrog dej zoo li cov hlau zoo tib yam. Txawm li cas los xij, nws tsis yog cov ntaub ntawv pov thawj tag nrho hauv cov pa oxygen tsawg, salinity siab, lossis cov huab cua tsis zoo. Muaj ntau qib sib txawv thiab nto tiav ntawm stainless hlau kom haum rau ib puag ncig lub alloy yuav tsum tau nyiaj. Stainless hlau yog siv nyob rau hauv ob qho tib si cov khoom ntawm hlau thiab corrosion kuj yuav tsum tau.

Stainless hlau txawv ntawm carbon hlau los ntawm tus nqi ntawm chromium tam sim no. Tsis muaj kev tiv thaiv carbon steel rusts yooj yim thaum raug huab cua thiab ya raws. Qhov no hlau oxide zaj duab xis (xeb) yog active thiab accelerates corrosion los ntawm kev tsim ntau hlau oxide [qhov xav tau kom paub meej]; thiab, vim hais tias ntawm qhov ntim ntau dua ntawm cov hlau oxide, qhov no zoo li flake thiab poob. Cov hlau tsis muaj chromium txaus los tsim cov yeeb yaj kiab ntawm chromium oxide, uas tiv thaiv kev xeb ntxiv los ntawm kev thaiv cov pa tawm mus rau cov hlau nto thiab thaiv kev xeb los ntawm kev sib kis mus rau hauv cov hlau sab hauv. Passivation tsuas yog tshwm sim yog tias qhov kev faib ua feem ntawm chromium siab txaus thiab muaj cov pa oxygen.