【Yangzhou Street Light Pole】 Zinc plating process of street light

April 26, 2021

With the development of the street lamp industry, the high-performance galvanizing process of street lamps is getting higher and higher.

The galvanizing of street lamps can be roughly divided into 4 types: • Hot galvanizing : It is the most common treatment method now, and it is also an effective way to prevent corrosion. It is characterized by high price, stable performance, and long use. However, due to the pickling and liquid zinc pot treatment, the workpiece is easily deformed. There will be zinc slag on the surface, and generally need to be polished and sprayed. The technical requirements are: According to national standards, the thickness of the hot-dip galvanized layer should be greater than 85um, and the surface of the hot-dip galvanized layer is free of obvious defects such as blisters, roughness, shelling, cracks, slagging, and leaking plating areas. • Cold galvanized : Cold galvanizing adopts a chemical galvanizing treatment method. A zinc layer is coated on the surface of the workpiece. Its anti-corrosion performance is far inferior to that of hot galvanizing, but it does not have a very high temperature, so the workpiece will not be deformed. Generally Will be used on courtyard lights and some special workpieces. • Zinc spraying : Zinc is melted at high temperature and sprayed on the workpiece. Its characteristics are fast speed, low price, and the workpiece is not deformed, but its corrosion resistance is not strong. • Passivation treatment, which controls the temperature on the basis of galvanizing to make it aging, and undergoes a chemical treatment to add an oxide film on the surface. After passivation treatment, the surface generally does not need to be sprayed.