INTRODUCTION
Phosphating is a layer conversion coating produced by a chemical attack of the metal with a phosphoric acid solution. Phosphate crystals are formed over the metal surface transforming the substrate surface. The crystal size varies from a microcrystalline grain to a rough grain.| TYPES OF PHOSPHATING |
SYSTEM |
COATING WEIGHT |
|
| Zinc phosphate |
Barrel |
Rack |
6-16 gr/m2 |
| Manganese phosphate |
|
Rack |
10-30 gr/m2 |
APPLICATIONS
| Zinc phosphate | Used as a non-lasting corrosion protection in combination with oil or wax application. Used as a fixing layer for further coatings, such as paints and zinc flake coatings (Xylan, Delta Tone and Delta Seal). |
| Manganese phosphate | Mn-Phosphate layers vary from fine crystal deposits to provide better corrosion resistance, to rough crystals deposits to retain oil for friction applications. |
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