The reason for using lightweight aluminum alloy idler rolls to transport galvanized steel pipes to the cooling bed after external zinc blowing and wiping treatment

After undergoing the external zinc blowing and wiping surface treatment, the galvanized steel pipes have completed the final finishing process for the galvanized layer. However, since the pure zinc layer has not yet solidified at this point, it is prone to scratching if not handled with care, which can damage the surface quality of the galvanized layer. If active roller conveyors are used, or if the pipes are made to roll on inclined planar racks, the former can produce relative motion with the galvanized steel pipes, erasing the pure zinc layer at the points of contact; the latter can also lead to the same situation, erasing the pure zinc layer where it comes into contact. Therefore, as long as no relative motion occurs between the galvanized steel pipes and the roller surfaces they come into contact with, the pure zinc layer can be ensured not to be erased. To achieve this, only lightweight aluminum alloy idler rolls can be relied upon for transfer. Due to their lightness, they can be driven by the friction force as the galvanized steel pipes move forward, resulting in virtually no relative motion at the points of contact. Therefore, there will be no scratching caused by the pure zinc layer being scraped off. This method has been used in actual production for more than 20 years with extremely satisfactory results.