Stages of the galvanizing process:
- The first operation is batch forming. Since we are galvanizing individual products, they need to be hooked up to suitable equipment so that they can be transported and subsequent operations can be carried out, and the chemical bath and zinc bath can flow freely.
- The next stage is the chemical preparation of the surface, which must be free from any contaminants, greases, paints, scale, iron oxides before entering the zinc bath. Surface preparation has a decisive influence on the quality of the zinc coating. In our Branch, we have eight process tanks with the appropriate baths. In the last tank, there is a mixture of salts that covers the etched surface to activate it for reaction with the zinc bath.
- The next operation is drying, for which a concrete dryer with a length of over 15 meters is used.
- The next operation is the actual galvanizing. The dried surfaces, covered with a layer of crystalline salt, are immersed in the zinc bath, where the essential process of galvanizing and forming the iron-zinc alloy takes place. To improve the quality of the coating, additional metals are introduced into the zinc bath.
- The penultimate operation is passivation. We perform it upon the customer’s request, and it involves covering the galvanized products with a layer of acrylic lacquer. The advantage of passivation is the enhancement of corrosion resistance and protection against oxidation for several months. The innovation of this process lies in its versatility. It can serve as the final coating or act as a primer for powder coating or wet painting.
- The final operation is the removal of the batch, cleaning, removing dross, excess zinc, and preparing for storage.
