What are the different types of Phosphating processes?
The phosphating process is implemented for converting a steel surface into iron phosphate, which is a pretreatment method merged with another method for corrosion protection. The phosphate coating generally involves iron, zinc, or manganese crystals. Phosphating is typically applied to cast iron, carbon steel, and low-alloy steel. This coating is mainly prepared with a solution of iron, manganese, or zinc phosphate salts in phosphoric acid. Then it is applied by either dipping the substrate into the solution or by spraying it onto the substrate. As the iron or steel parts are put in the phosphoric acid, the reaction causes hydronium ion to deplete, and the pH range rises, causing the salt to dissolve and fall out of the solution and get precipitated on the surface. The process is also known as phosphate conversion coating or phosphating. Here is an elaborative detail about different types of phosphating. · Iron Phosphating Iron Phosphating offers an increase in paint adh