Galvanized sheet Gu Ming means that the surface of the board is coated with a layer of zinc, and the galvanized surface is smooth, which can be used for a long time in order to prevent rust. As a relatively primary semi-finished product for the production of metal products, galvanizing is widely known by everyone, but a few people know that galvanizing is also divided into hot-dip galvanizing and cold-dip galvanizing. Here is an explanation of the difference between the two types of galvanizing, from production to production The completed process will show you the differences between the processing and production of the two, layer by layer, so that everyone can better understand the advantages and disadvantages of the two galvanizing and their applications.
Hot-dip galvanizing is also called hot-dip galvanizing. It melts the zinc ingot at a high temperature, puts some auxiliary materials, and then immerses the metal structure in the galvanizing tank, so that a layer of zinc is attached to the metal component. The advantage of hot-dip galvanizing is that it has strong anti-corrosion ability, and the adhesion and hardness of the galvanized layer of building reinforcement engineering are good. Hot-dip galvanizing is a chemical treatment and belongs to an electrochemical reaction. Hot-dip galvanizing is often used in building construction.
Continuous hot-dip galvanizing process: steel → heating → cooling to galvanizing temperature → galvanizing → cooling
"Cold plating" means "electroplating", that is, the zinc salt solution is electrolyzed to coat the plated parts. Generally speaking, the reinforcement of construction projects does not require heating, and the amount of zinc is very small, and it is easy to fall off in a humid environment. Cold galvanizing is a physical treatment, just brushing a layer of zinc on the surface, so the zinc layer is easy to fall off.
Cold galvanizing is electro-galvanizing, only 10-50g/m2, and its corrosion resistance is much different than that of hot-dip galvanizing. The price of electro-galvanized building reinforcement is relatively cheaper. Hot-dip galvanizing means that the steel body is galvanized on the surface under the condition of hot dipping. It has strong adhesion and is not easy to fall off. Although the hot-dip galvanized pipe also appears rust, it can meet the technical and sanitary requirements for a long period of time.