The role of phosphating agents is evident, as they not only improve the efficiency of modern production, but also make new breakthroughs in improving overall processing quality. With the continuous introduction of technology, the types of phosphating solutions have also undergone many changes. The slag free zinc based phosphating solution, zinc plating specific phosphating solution, ternary room temperature phosphating solution, and medium temperature black manganese based phosphating solution are all representatives of technological innovation. In order to fully utilize its value, manufacturers need to improve operability in handling methods. So, let's learn about the main advantages of using spray method with phosphating agents together!

On the one hand, when manufacturers use phosphating agents, if the phosphating agent is directly sprayed on the surface of the workpiece, the formation rate of the phosphating film is much faster than when the workpiece is immersed in the same phosphating solution, or phosphating can be carried out simultaneously at lower temperatures. The spray method is not suitable for high-temperature manganese salt phosphating because the heat loss is too large.

On the other hand, the spray method is widely recognized by many manufacturers. Its advantages are as follows:

1.The phosphating solution in contact with the metal surface is always kept fresh. The soaking method is different, and the phosphating solution in contact with the metal surface will gradually lack film-forming ions, which can only be supplemented by film-forming ions diffused from the phosphating solution at a distance.

2.Spray phosphating can remove solids attached to metal surfaces after degreasing. If these solids are not removed, the phosphating film will produce hanging ash or sand particles. Stirring the phosphating agent also has a certain accelerating effect, but attention should be paid to preventing sediment from adhering to the metal surface.

    Phosphating agent is the process of forming a phosphate chemical conversion film through chemical and electrochemical reactions, and the formed phosphate conversion film is called a phosphating film. The main purpose of phosphating is to provide protection for the base metal and to some extent prevent corrosion of the metal. Phosphating film, as the bottom layer before coating, improves the adhesion and anti-corrosion ability of the paint film layer, and can reduce the use of friction and lubrication in metal cold processing. After oil and rust removal on the metal surface, chemical treatment is usually carried out to prevent regeneration rust, forming a protective film on the metal surface. It is usually only a few microns, mainly to enhance the adhesion between the coating and the metal surface. A thicker film layer can also enhance rust prevention performance. The commonly used surface chemical conversion methods include oxidation, phosphating, and passivation. Among them, phosphating is the central link in chemical treatment. It is a simple, reliable, low-cost, and easy to operate process method that greatly improves the corrosion resistance of metal workpieces. It is widely used in industry. Phosphate conversion coatings are applied to iron, aluminum, zinc, cadmium, and their alloys. They can not only be used as decorative layers, but also as intermediate layers for other covering layers. Its main function and anti-corrosion principle are as follows: to improve corrosion resistance. Although the phosphating film is thin, it is a non-metallic non-conductive isolation layer that can transform good conductors on the surface of metal workpieces into poor conductors, suppress the formation of micro currents on the surface of workpieces, and effectively prevent coating corrosion.