Cov khoom ntawm cov yeeb yaj kiab passivation

Lub thickness ntawm passive zaj duab xis feem ntau feem ntau los ntawm 0. 5 txog 1 micrometer (μ). Nws yog qhov ruaj khov, nrog tus qauv tuab thiab pob tshab nws yog xim hlau. Cov zaj duab xis passions lub pores ntawm cov galvanized txheej, tiv thaiv cov anodic txheej ntawm zincanized lub neej ntawm galvanized steel kav dej tsis kam. Lub hexavalent chromium nyob rau hauv lub passivation zaj duab xis kuj ua lub luag haujlwm ntawm kev kho cov yeeb yaj kiab uas puas lawm. Cov xim ntawm tuab credivation zaj duab xis hloov los ntawm liab mus rau daj li lub hexavalent chromium cov ntsiab lus txo qis. Nyias cov yeeb yaj kiab uas muaj kev sib tw ua kom pom cov xim Iridescent cov xim vim qhov cuam tshuam loj. Tsis pub dhau 24 teev ntawm kev tsim, cov corrosion tsis kam, adhesion, thiab hardness, thiab hardness ntawm tus passivation zaj duab xis yog qhov tsis muaj zog. Thaum cov neeg ua yeeb yaj kiab passivation tau qhuav ntawm qhov kub tshaj 70 degree, nws corrosion kuj yog neeg pluag.