Raws li tau hais ua ntej, cov yeeb yaj kiab ib txwm ua rau ntawm qhov chaw galvanized ntawm galvanized steel kav feem ntau yog daj. Txawm li cas los xij, tom qab cov khoom siv ntawm cov kav dej galvanized tau txias hauv dej, txawm tias cov dej txias hauv cov yeeb nkab qhov dej ntws tawm, tseem muaj cov dej noo ntau adhering rau saum npoo, uas yog nqa mus rau hauv cov tshuaj passivation. Tom qab ntawd, qhov no dilutes cov tshuaj passivation, txo nws cov concentration. Cov kev tshwm sim muaj xws li ib tug qeeb passivation tus nqi, ib tug passivation zaj duab xis uas tsis ua raws li cov kev cai, thiab txawv xim. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum nruj me ntsis tswj cov concentration nyob rau hauv cov txheej txheem teev. Qhov no yuav tsum tau kuaj xyuas cov dichromate (los yog chromate thiab chromic acid) cov ntsiab lus thiab sulfuric acid cov ntsiab lus hauv cov tshuaj passivation. Tsuas yog los ntawm kev ua li ntawd thiaj li ua tau ib zaj duab xis passivation zoo ib yam.
Piv txwv li, yog hais tias muaj ntau ntau ntawm dichromate (los yog chromate thiab chromic acid) thiab sulfuric acid ntxiv rau ib tug diluted passivation tov, lub passivation zaj duab xis yuav tig liab-xim av los yog muaj ntshav streaks, nrog ib tug ntxhib nto tshwm, thiab cov ntshiab zinc txheej. tuaj yeem ua nyias. Yog li ntawd, kev tswj nruj ntawm qhov concentration ntawm cov tshuaj passivation yog qhov tseem ceeb heev.
