The difference between hot-dip galvanizing and cold galvanizing of street light poles
As we all know, today's solar street light poles use hot-dip galvanizing to prevent rust and paint peeling. Why do we see that many light poles still rust and peel off the paint? That's because some bad manufacturers use cold galvanizing; then, what is the difference between hot-dip galvanizing and cold galvanizing, let me explain to everyone:
Both cold galvanizing and hot-dip galvanizing of solar street light poles are for anti-corrosion and prolong the service life of street lights, so what is the difference between them?
The difference between the first process:
Cold galvanizing is also called electro-galvanizing. It uses electrolysis equipment to put the workpiece in a solution of zinc salt after degreasing and pickling, 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 electrolysis device. Positive pole, turn on the power, use the directional movement of the current from the positive pole to the negative pole, it will deposit a layer of zinc on the workpiece;
Hot-dip galvanizing is to immerse the workpiece in the molten zinc solution for a certain period of time after degreasing, pickling, dipping, and drying.
The second difference in appearance:
The electro-galvanized surface is relatively smooth and bright, and the electroplated layer using the color passivation process is also yellow-green as the main color, which is colorful. The electroplated layer using the white passivation process is bluish-white or white with green light, and the electroplating layer of the white passivation process is slightly colorful under a certain angle with the sunlight. The corners of complex workpieces are prone to "electric firing" and become grayish, where the zinc layer is thicker. The current dead angle is easy to form in the negative corner, resulting in an undercurrent gray area, where the zinc layer is thinner. There is no zinc tumor or agglomeration on the whole work piece.
The appearance of hot-dip galvanizing is slightly rougher than that of electro-galvanizing, and it is silvery white. The appearance is prone to process water lines and a few drippings, especially at one end of the workpiece.
However, the slightly rough hot-dip galvanized zinc layer is dozens of times thicker than electrogalvanized, and its anti-corrosion performance is also dozens of times that of electrogalvanized. The price is naturally much higher than that of cold galvanized, but in the long run , Hot-dip galvanizing with rust-proof for more than 10 years will be more popular than cold galvanizing with rust-proof effect for only 1-2 years.
We have always paid attention to product quality and adhered to the tenet of "Quality is the life of the enterprise". At the same time, we have always been focusing on the research and development of new products and humbly listening to customers' opinions. This has enabled us to continue to grow and develop in the market competition. "Quality first, reputation first, customer first" is our consistent tenet, "survive by quality, benefit from management" is our corporate creed, and we wholeheartedly provide the best service to new and old customers.
