The specific process of hot dip galvanizing

Hot-dip galvanizing is to melt the zinc ingot at a high temperature, then put some auxiliary materials into it, and then immerse the workpiece, that is, to coat the zinc layer. Next, I will take you through the specific hot-dip galvanizing process.

First of all, the workpiece should be degreasing, that is, chemical degreasing, so that the workpiece is completely wetted by water. Pickling will be carried out after cleaning. The addition of sulfuric acid and corrosion inhibitor can not only achieve pickling, but also avoid excessive acidity. The next step is to dip the auxiliary solvent, also known as the adhesive, which can ensure the activity of the workpiece and enhance the bonding of the coating and the workpiece. After drying, the preheating process is completed. In order to prevent the workpiece from deforming due to the sharp rise in temperature, remove the remaining water and prevent the zinc liquid from splashing.

Pickling is the most important process of hot-dip galvanizing. If handled improperly, the adhesion of galvanizing will be very low, or even fall off. The next step in drying is hot dip galvanizing. It is best to control the temperature, time and speed of galvanizing. It is best to be operated by experienced staff. After hot-dip galvanizing, it is finished, passivated and cooled. The vibration method can be used to remove excess zinc. The purpose of passivation is to improve atmospheric corrosion resistance and reduce the possibility of rust. Water is usually used for cooling, but the temperature should not be too low to prevent the workpiece from cracking.