– For 48 hours, dose NALCO 8457 at 1.5–2× normal level while maintaining pH 7.5–8.0.
Keep in a cool, dry place away from incompatible substances. nalco 8457
Whether you are an engineer optimizing the precipitation train, a buyer sourcing high-purity alumina, or a student memorizing material codes, remember: Nalco 8457 — Full Write-up Pre-Passivation – For
Azoles chemically bond to copper surfaces, creating a chemisorbed film. This prevents copper corrosion, which can lead to pitting and galvanic issues. Legacy Product Notice

