Phosphating

Zinc phosphating is one of the most commonly used methods of chemical surface treatment of metals, mainly steel and cast iron, to improve their performance properties. This process involves creating a layer of zinc phosphates on the metal surface, which acts as a protective layer and increases the adhesion of paints or lubricants.

 

1. Corrosion protection:
   • The phosphate layer acts as a physical and chemical barrier, slowing down corrosion processes.
2. Improved adhesion:
   • Phosphating creates a rough, porous structure, which increases the adhesion of paints, varnishes or powder coatings.
3. Friction reduction:
   • Used as a sliding layer in cold forming processes, e.g. in stamping or bending of sheets.
4. Preparation for further processing:
   • Ideal layer under paints, anti-corrosion oils or lubricants.