Our metal pretreatment system is eight tank zinc phosphating system. The time duration is based on room temperature.
Tank-1 : Alkaline base degreaser
Metal cleaning is the essential process for the surface finish. Metal cleaning here is removal of grease, oil, soil, lubricating, oxide films etc.
Timing : 10 to 15 minutes.
Tank – 2 : Water rinsing
Tank – 3 : Phosphoric (h5PO4) acid base Deruster.
This process removes rust, scale, loose oil, carbonates etc.
Timing : 15 to 20 minutes.
Tank – 4 : Water rinsing
Tank – 5 : Titanium base Activator/ Modifier.
This process allows the development of compact crystal structure on metal surface for excellent phosphate coating and reduces phosphating time.
Timing : 1minute.
Tank – 6 : Zinc Phosphating.
Zinc phosphate protects the metal surface from corrosion. It also gives superior bonding to the metal surface thus enhancing the durability and life of paints & powder coats.
Confirming to class ‘C’ IS : 3618.
Timing : 15 to 20 minutes.
Tank – 7 : Water rinsing.
Tank – 8 : Non Chrome Liquid Passivation.
Passivation treatment seals phosphate surface.
Timing : 1 minute.