Hot-dip galvanizing makes it possible to protect the processed products from corrosion. After coating an object does not need painting for many years (from seventy to one hundred and twenty, depending on the conditions). In addition, it is endowed with the ability to independently heal minor damage to the coating.
So, at what stages it is possible to divide the process of hot galvanizing?
First, once on the enterprise, the product goes through several preparatory procedures. It is degreased and washed, then etched with a solution of hydrochloric acid, and then washed again. Finally, it is dried and then cooled to a certain temperature. Finally, the product can go to the main shop.
Getting into the galvanizing shop, it is suspended and lowered into the bath with hot zinc, the temperature of which can reach 200 degrees Celsius. A special rotating drum allows the zinc coating to be evenly distributed over all parts of the product, filling all small holes . After cooling, the process can be considered complete.
For the hot-dip galvanizing industrial zone, some features are characteristic. For example, a bath with molten zinc is suspended on strong hooks for easy movement on the shop floor. The entire production process is controlled by a shield located in the next room. Each stage is controlled personally, one procedure does not depend on the other. Also in the industrial zone installed alarm system that responds instantly to changes in temperature or concentration of harmful substances. To reduce the harm caused by production, hot air streams are cooled and emissions filtered before they are released into the atmosphere.