Passivation Chemicals For Structure Galvanizing, Packaging Type : Hdpr Jar

PASSIVATING CHEMICALS :

Zinc is also a sensitive metal which forms white rust on exposure to air and moisture. The corrosion products give an unsightly, mottled surface consisting of the loose powder that makes it unfit for the industrial and domestic uses. White rust damages long-term protection of the base steel. Passivation of the galvanized surface is inevitable for long life of the articles.

1. Alibond 292 – It is a hexavalent chromium based chemical process, which produces a protective colourless chromate conversion coating on galvanized iron. The coating protects the surface from corrosion and finger staining and renders a gloss to the surface. It can be used by dip or spray.

2. Alibond 304 – Due to the hazardous nature of hexavalent chromium industries prefer trivalent chromium based products. It is a trivalent chromium based chemical process, which produces a protective almost colourless to very light bluish chromate passivating film on galvanized iron. It can be used by dip or spray in galvanizing plants and specially recommended for continuous strip lines.

3. Zipac 305 (Non chrome) – It is a unique eco friendly product free from chromium. It is a water soluble conversion cum passivating chemical, ideally suitable for zinc coated metal surfaces. The chemical forms a thin film over the zinc coated steel (G.I.), which forms a protective non-chrome layer to improve the corrosion resistance properties of the treated metal. ZIPAC 305 may also be used effectively for aluminium –zinc coated strips. The toxicity profile of chromium and pollution effect of chromates can be eliminated by using the new generation product in coil lines.