Dab tsi yog cov khoom ntawm passivation zaj duab xis?

Lub thickness ntawm cov zaj duab xis passivation feem ntau yog nyob ntawm 0.5 mus rau 1 micrometer (μ). Nws yog qhov ruaj khov heev hauv qhov xwm txheej, nrog cov qauv zoo thiab ntom, nthuav tawm cov xim pob tshab xim hlau. Cov zaj duab xis passivation seals lub pores ntawm galvanized txheej, tiv thaiv cov anodic dissolution ntawm zinc, yog li ncua lub neej kev pab cuam ntawm galvanized steel kav thiab txhim kho lawv corrosion kuj. Lub hexavalent chromium nyob rau hauv cov zaj duab xis passivation kuj plays lub luag hauj lwm hauv kev kho cov yeeb yaj kiab puas. Cov xim ntawm cov yeeb yaj kiab tuab tuab hloov ntawm liab mus rau daj raws li cov ntsiab lus hexavalent chromium txo. Nyias passivation films nthuav tawm xim iridescent vim lub teeb cuam tshuam. Tsis pub dhau 24 teev ntawm kev tsim, corrosion kuj, adhesion, thiab hardness ntawm passivation zaj duab xis kuj tsis muaj zog. Thaum cov zaj duab xis passivation qhuav ntawm qhov kub siab tshaj 70 degree, nws cov corrosion kuj tsis zoo.