First understand the difference between hot-dip galvanizing and cold galvanizing:

1. Hot-dip galvanizing is also called hot-dip galvanizing. It melts the zinc ingot at high temperature, puts some auxiliary materials, and then dips the metal structure into the galvanizing tank, so that a layer of zinc is attached to the metal component . The advantage of hot-dip galvanizing lies in its strong anti-corrosion ability, and good adhesion and hardness of the galvanized layer.

2. "Cold plating" means "electroplating", that is, the zinc salt solution is electrolyzed to coat the plated parts. Generally speaking, there is no heating, and the amount of zinc is very small, and it is easy to fall off in a humid environment. The coating is 10-50g/m2, and its corrosion resistance is much worse than that of hot-dip galvanizing. The price of electro-galvanizing is relatively cheaper.

3. Process difference

First of all, the process difference is:

Hot-dip galvanizing is to degreasing, pickling (now adopting one-step degreasing and rust removal method), dipping and immersing the workpiece in the molten zinc solution for a certain period of time before putting it out.

Electro-galvanizing is to use electrolytic equipment to remove oil and pickle the workpiece (now a one-step degreasing and rust removal method is used), then put it in a solution of zinc salt, and connect the negative electrode of the electrolytic equipment; place zinc on the opposite side of the workpiece The plate is connected to the positive electrode of the electrolysis equipment, the power is turned on, and the current is moved from the positive electrode to the negative electrode, and a layer of zinc is deposited on the workpiece.

The difference between galvanized products:

The appearance of hot-dip galvanizing is not as delicate and bright as cold galvanizing, but the thickness of the zinc layer is dozens of times that of cold galvanizing. The anti-corrosion performance is also dozens of times that of electro-galvanized.

Hot-dip galvanizing standard: GB/T13912-92, the average zinc layer weight after galvanizing is not less than 460g-610g/m2;

Therefore, it is not difficult to tell whether the welded mesh is hot-dipped or cold-plated according to the thickness of the coating.