• Good pre-treatment leads to good coating performance and longer life of coating.
   

• Pre-treatment should take place immediately prior to application of the organic finish with minimum time lag in between.
   

• There should be no pro-longed handling or storage of pre-treated metal prior to painting.
   

• Multi-stage cleaning and pre-treatment system is used to remove any organic and inorganic soil and apply a chemical conversion coating to which organic coatings will firmly adhere.

Steps in pre-treatment:

1. Surface preparation: Removing organic contaminants from metal surface with an alkarline cleaner.

2. Rinsing: Dilute cleaner's residues to prevent interference with pre-treatment

3. Descaling: Removing inorganic contaminants from metal surface using diluted acid or chelated alkaline descaler.

4. Rinsing: Diluting descaler to prevent interference with pre-treatment

5. Grain refiner: Enable creation of uniform crystal of phosphate on metal surface.

6. Apply Iron phosphate / Zinc phosphate to increase adhesiveness of coating..

7. Rinsing: Dilute phosphate salts from metal surface.

8. Seal: Use of chrome precipitate puts a matrix on metal surface which promotes further adhesiveness of paint.

9. Rinsing: Dilute any final residues on the surface.

10. Dry: Metal dried and ready for painting