Why Use a 7-Tank Phosphating Process?
- The 7-Tank Phosphating Process is used to achieve maximum coating performance, superior corrosion resistance, and longer product life before powder coating or painting. Each tank performs a specific function that prepares the metal surface step-by-step, ensuring a clean and chemically active substrate for coating.
* Purpose of Each Tank
Tank 1 – KLN-18 Degreasing
- Removes oil, grease, dirt, and shop-floor contaminants.
- Ensures the metal surface is completely clean.
* Tank 2 – Water Rinse
- Removes residual degreasing chemicals.
- Prevents contamination of the next tank.
* Tank 3 – RLN-27 De-Rusting
- Removes rust, oxide scales, and mill scale.
- Restores a fresh metal surface.
* Tank 4 – Water Rinse
- Washes away acidic residues from de-rusting.
- Prevents chemical carryover.
* Tank 5 – AR-36 Activator
- Activates the metal surface.
- Produces finer and more uniform phosphate crystals.
- Improves phosphate coating quality.
* Tank 6 – ZNP-54 Phosphating
- Forms a microscopic crystalline phosphate layer.
- Provides excellent paint and powder coating adhesion.
- Improves corrosion resistance.
* Tank 7 – PSV-72 Passivation
Seals the phosphate coating.
Increases resistance to rust and moisture.
Enhances coating durability and finish quality.
Why Not Directly Powder Coat the Metal?
* Without phosphating:
Paint adhesion becomes weak.
Coating may peel or blister.
Rust develops quickly.
Product life is reduced.
Surface finish becomes inconsistent.
* With 7-Tank Phosphating:
Stronger powder coating bond.
Better corrosion protection.
Improved finish quality.
Longer service life.
Reduced coating failures and customer complaints.
Ideal For
Steel Almirahs
School Furniture
Office Furniture
Electrical Panels
Control Panels
Sheet Metal Parts
Fabricated Metal Components
- In simple terms: The 7-tank phosphating process creates a clean, rust-free, chemically prepared surface with a protective phosphate layer, allowing powder coating to adhere perfectly and last for years without peeling or rusting.
