In recent years Braglia Verniciatura has renovated its pretreatment plant, adding to the existing phosphating system: alkaline washing, two rinses with mains water, one washing cycle with demineralised water and "no rinse" passivation using zirconium salt.
Phosphating is a procedure used for protecting ferrous metals (alloy steel and cast iron).
This treatment is performed to:
- Improve the corrosion resistance of metals
- Provide a better anchor for paint, lacquer, enamel etc.
- Confer greater wear resistance to treated parts
The degreasing and phosphating cycle - which precedes the coating phase - consists of a three stage washing system:
- hot degreasing at 60°C + first rinse
- cold phosphating
- second hot rinse at 60°C.