What is Phosphating ?
Phosphating Meaning :
Phosphating is the process of creating conversion coating on the surface of the metal. Phosphate Coating creates tiny crystalline and water insoluble on the metal surfaces using phosphoric acid solutions. Metal such as carbon steel, low-alloy steel and cast iron uses Phosphate coating.
For this purpose it is cleaned with acid and then immersed in the solutions. As a result of chemical reaction of base metal with acid, fine crystalline structure form on the metal.
Thus,Phosphating is a surface treatment technique that involves the chemical reaction of an aqueous phosphate solution with a metallic surface. As a result, a hardly soluble metal phosphate conversion layer is produced. The material is first cleansed with acid for this purpose, and after that, a phosphate layer is created.
What is Phosphating Process?
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Features Of Phosphate Coating are:
- ayer of Manganese ,Zinc or Zinc/Calcium of Pale to grey in colour
- Fine to Coarse Crystalline Phosphates depending upon the procedure
- Additional Layer
- Presence of many Capillaries in the layer helps in absorbing corrosion protection oils, lacquers, paints, etc.
- Allow excellent corrosion Protection
- Electrically Non-Conductive nature of phosphate layer
Types Of Phosphting
phosphate coatings are of 3 types which are manganese, iron, and zinc.
- Manganese phosphate coatings helps in corrosion resistance and lubricity and method used is immersion.
- Iron phosphate coatings generally forms a base for further coatings or painting and method used is immersion or spray.
- Zinc phosphate coatings helps in corrosion resistance, also act as lubricant-holding layer, and as a paint/coating base and method used is immersion or spray. They can also be applied to galvanized steel.
If you are looking for the best phosphating chemical , M. Chem. L. P. Series of chemical for Phosphate Coating gives the best result in 7 Tank Phosphating Process.
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