Differences between hot galvanizing and cold-galvanizing processes

The galvanizing process of building materials is very versatile, so today we will understand the difference between the two common galvanizing methods, hot galvanizing and cold-galvanizing. These two ways we define them in terms of definition, process.

galvanizing process - Differences between hot galvanizing and cold-galvanizing processes

Definition difference

Hot galvanizing is an effective metal anti-corrosion method, mainly used in metal structure facilities of various industries. The rust-removed steel is immersed in a zinc solution melted at about 500 ° C to adhere the zinc layer to the surface of the steel member, thereby preserving the corrosion. Galvanizing is for steel grid plates, which are chemically treated and are electrochemical reactions. Cold galvanizing is a physical treatment, except that a layer of zinc is applied to the surface, so the zinc layer is easy to fall off. Hot-dip galvanizing is often used in construction.

Cold galvanizing: It is electro-galvanized. The amount of zinc on the surface is small, only 10-50g/m2, which is a process of attaching a metal film to the surface of metal or other materials by electrolysis. The process of forming a uniform, dense, and good bonding metal layer can prevent corrosion, improve wear resistance, electrical conductivity, light reflectivity, and enhance aesthetics. Hot-dip galvanizing is the galvanization of the surface of the steel body under hot-dip conditions. Its adhesion is very strong and it is not easy to fall off. Although the hot-dip galvanized pipe also has rust phenomenon, it can meet the technology and hygiene in a long period. Claim.

Process difference

Hot galvanizing: It is a time when the workpiece is degreased, pickled, dipped, dried and immersed in molten zinc for a certain period of time.

Cold galvanizing: also called electro-galvanizing, is the use of electrolysis equipment to remove the oil, pickling and put into the solution of zinc salt y_toitt, and connect the negative electrode of the electrolysis equipment; place the zinc plate on the opposite side of the workpiece to connect to the electrolysis The positive pole of the device, when the power is turned on, and the current is moved from the positive electrode to the negative electrode, a layer of zinc is deposited on the workpiece.

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