Why is the street light pole hot-dip galvanized?

With the acceleration of the country's urbanization, the demand for road lighting is becoming more and more important, and the market for supporting street light poles is also growing. But did you know? Street light poles are divided into hot-dip galvanizing and cold-dip galvanizing processes? Why do street light pole manufacturers use hot-dip galvanizing instead of cold-dip galvanizing? The following lighting will tell you why the street light pole should be hot-dip galvanized.

1. What is hot-dip galvanizing and the advantages of hot-dip galvanizing?

Hot-dip galvanizing is also called hot-dip galvanizing and hot-dip galvanizing: it is an effective metal anti-corrosion method, mainly used in metal structure facilities in various industries. It is to immerse the derusted steel parts in a molten zinc solution at about ℃ to make the surface of the steel parts adhere to the zinc layer, thereby achieving the purpose of corrosion protection. Hot-dip galvanizing process: the finished product is pickled and washed with a plating solution, drying, rack-plating, cooling, chemical cleaning, polishing, and hot-dip galvanizing is completed.

The anti-corrosion performance of hot-dip galvanizing is much greater than that of cold-dip galvanizing: when the zinc layer is seriously damaged and the iron substrate is endangered, zinc will produce electrochemical protection for the substrate. The standard potential of zinc is .V, the standard potential of iron.V, zinc When forming a microbattery with iron, zinc is dissolved as an anode and iron is protected as a cathode. Therefore, hot-dip galvanizing of street light poles has better atmospheric corrosion resistance to the base metal iron than electro-galvanized.

2. What is cold galvanizing and what are its advantages?

Cold galvanizing is also called electro-galvanizing. It uses electrolysis equipment to degreasing and pickling the workpiece and put it into a solution of zinc salt, and connect it to the negative electrode of the electrolysis device. Place a zinc plate on the opposite side of the workpiece and connect it to the The positive electrode of the electrolysis equipment is turned on and the current is moved from the positive electrode to the negative electrode to deposit a layer of zinc on the workpiece. The appearance of the cold-galvanized street light pole is smooth and bright.

However, the beautiful appearance of cold-galvanized street light poles has an anti-corrosion effect only up to 1 year, while the zinc layer of hot-dip galvanized street light poles with rough surfaces is dozens of times thicker than cold-dip galvanized street light poles, and has better anti-corrosion performance. It’s a big lead. Hot-dip galvanized street light poles, our street light pole manufacturers, will not rust for at least one year. Although the price of hot-dip galvanized street light poles will be a bit more expensive than hot-dip galvanizing, in the long run, it will prevent rust from being hot Galvanizing is still more popular than cold galvanizing, and street lights are an important project in road construction and the image of a place. If cold galvanized street light poles are used, rusting will greatly affect the appearance after two years! Therefore, the street light pole should be hot-dip galvanized.