A process by which alters the surface of a metal material, creating the crystals are chemically bound to the substrate with the phosphatic order to exploit the properties of these compounds to improve the resistance to corrosion and promote adhesion of the subsequent coating.
The phosphating is a common procedure to use iron and ferrous alloys; is the preparation treatment for coating of steel sheet universally adopted in the automotive industry, as required to achieve the very high corrosion resistance characteristics required to the shells.
The phosphating treatment uses solutions of phosphate (zinc phosphate, iron, manganese, nickel phosphates), to coat the surface with a protective crystalline layer (thickness 5-10 uM) in phosphate which confers high resistance to corrosion and improves the ' adhesion of the layer of paint due to increased surface micro-roughness. The layer obtained must be uniform, compact and composed of small crystals. The process is carried out in spray or immersion systems, normally integrated with those of degreasing. The immersion system provides superior results not only in that it is effective even in difficult to reach areas (molded, etc.), But also because the layer has different features (rounded rather than needle-like crystals).
| LVA 560-14 PHOS-ROBOTRONIC 200 | |
| Presentation pieces at treatment: | into baskets |
| Pieces dimensions: | treated in basket |
| Basket size: | 560 x 560 x 650 H mm |
| Nature of the pieces Material: | Steel |
| Pieces max. weight: | Load up to 150 kg |
| Loading height: | 600 mm |
| Power Supply: | 400 V - 3 ph - 50 Hz |
| Auxiliaries | 24 V DC |
| Compressed air: | 5 Bar |
| Inlet water: | 20°F (water hardness) |
| Water consumption: | Approx 25 litres/hour |
| Load/Unload: | Automatic |
| Conversion to obtain: | Manganese phosphate 4-12 microns |
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