Rov qab ntawm Chromic Acid Solution:
Passivation daws uas muaj hexavalent chromium tsis raug tso cai tawm. Tam sim no, cationic pauv resins feem ntau yog siv los ua ntej rov qab cov hexavalent chromium. Tom qab ntawd, txo cov neeg ua haujlwm xws li ferrous sulfate yog ua haujlwm los txo cov hexavalent chromium, ua raws li kev ua haujlwm nruab nrab nrog txiv qaub mis nyuj thiab nag lossis daus sib cais. Tom qab kev sib cais, tus supernatant tuaj yeem tso tawm.
Kev kho cov khib nyiab Phosphating Solution:
Kev kho cov khib nyiab phosphating cov kev daws teeb meem feem ntau siv cov txheej txheem ntawm neutralization thiab nag lossis daus nrog txiv qaub kua txiv.
