Cov neeg sawv cev tshaj plaws rau cov tshuaj lom neeg rau chromate passivation daws hauv Suav teb tau siv rau ntau xyoo dhau los. Tom qab xws li lub sijhawm ntev lub sijhawm, nws tau ua pov thawj ua tau zoo thiab ua tau. Nws lub ntsiab tivthaiv yog sodium dichromate, uas yog qhov pheej yig. Los ntawm kev ntxiv ib qho nqi ntawm cov sulfuric suldic acid thiab dej kom sodium dichromate, txoj kev daws teeb meem tuaj yeem npaj tau. Cov mis tshwj xeeb yog raws li hauv qab no:
Sodium Dichromate (Na₂Cromate (Nau-₂Cr₂₂₂ ((Nia₂cr₂₂₂): 0. 4-0. 6%; 6%; Sulfuric acid (h ₂so₄) (98%): {5 5}}. 1%;
Dej (h₂o):: cov seem.
Kuj tseem muaj cov chromic acid passivation kev daws teeb meem uas muaj kev sib sau ntawm cov sulfic anhydride, muaj cov roj sulfuric acid, thiab dej, tab sis nws kim dua. Cov mis yog li hauv qab no: Chromic anhydride (cro₃): {{{}}}}}}}}}}}}}}}}}}}}}}}}}}} seem.
Qee yam teeb meem ntxiv 4-5}% sodium hydrocide (Naoh) rau cov mis no.
