Yangzhou Langxu Lighting Technology Co., Ltd.




What is the difference between cold galvanizing and hot galvanizing in street lamp pole manufacturers

Light pole manufacturers<>The purpose of using cold galvanizing and hot-dip galvanizing is to prevent corrosion and prolong the service life of street lamps. However, compared with cold galvanizing, hot-dip galvanizing can prevent corrosion.

First process difference:

Cold galvanizing also It is called electro-galvanizing. It uses electrolysis equipment to remove the oil and pickle the workpiece into a solution of zinc salt. It is connected to the negative electrode of the electrolyzer. The zinc plate is placed on the opposite side of the workpiece and connected to the positive electrode of the electrolysis device. The power source, using the current to move from the positive electrode to the negative electrode, deposits a layer of zinc on the workpiece;

The hot-dip galvanizing is to remove the oil and acid from the workpiece. After washing, dipping, drying, and immersing in the molten zinc solution for a certain period of time, it can be put forward.

The difference in appearance:

The appearance of electro-galvanized zinc is smooth and bright, and the electroplating layer using color passivation process is also yellow-green as the main color, which is colorful. The plating layer using the white passivation process is blue-white or white-green, and the white passivation process is slightly colored at a certain angle to the sunlight. In the corners of complex workpieces, it is easy to produce "electric burning" to become gray, and the zinc layer in this part is thick. In the corner of the corner, it is easy to form a current dead angle to produce a dark area of undercurrent, and the zinc layer in this area is thin. There is no phenomenon of zinc film and agglomeration in the whole workpiece.

       The appearance of hot-dip galvanizing is slightly rougher than electro-galvanized, silver-white, the appearance is easy to produce process water lines and a little drop, especially at the end of the workpiece. However, the hot-dip galvanized zinc layer is several times thicker than electrogalvanized, and the corrosion resistance is several times that of electrogalvanized.