1. Conceptual analysis Hot dip galvanizing: also known as hot dip galvanizing and hot dip galvanizing: it is an effective metal anti-corrosion method. It melts zinc ingots at high temperatures, puts some auxiliary materials, and then immerses the metal structure into the galvanizing tank, so that a layer of zinc is attached to the metal components, so as to achieve the purpose of anti-corrosion. The advantages of hot galvanizing are its strong anti-corrosion ability, good adhesion and hardness of the zinc coating, so as to achieve the purpose of anti-corrosion. Cold galvanizing: refers to galvanization, with a small amount of zinc, only 10-50g/m

2. It is the process of using electrolysis to attach a layer of metal film to the surface of metal or other materials. The process of forming a uniform, dense and good adhesion metal layer can prevent corrosion, improve wear resistance, conductivity, reflectivity and improve aesthetics. 2. Differences in reaction modes Hot galvanizing is a chemical treatment and belongs to electrochemical reaction Hot dip galvanized pipe is used to make molten metal react with iron substrate to produce alloy layer, so as to combine the substrate and coating Cold galvanizing is a physical treatment, only a layer of zinc is brushed on the surface, so the zinc layer is easy to fall off. Hot galvanizing is often used in building construction

3. Process difference Hot galvanizing is to dip the workpiece into the melted zinc solution for a certain time after degreasing, pickling, dipping and drying, and then take it out. Cold galvanizing is to use electrolytic equipment to put the workpiece into the solution containing zinc salt after degreasing and pickling, and connect the cathode of the electrolytic equipment; Put a zinc plate on the opposite side of the workpiece and connect it to the positive pole of the electrolysis equipment. Connect the power supply and use the directional movement of the current from the positive pole to the negative pole to deposit a layer of zinc on the workpiece

4. Difference between finished galvanized products Difference between galvanized products: the appearance of hot galvanizing is not as smooth and bright as that of cold galvanizing, and the coating is even. However, the thickness of hot galvanizing is dozens of times that of cold galvanizing. Corrosion resistance is dozens of times of that of galvanization Hot dip galvanizing, also known as hot dip galvanizing, is a method of immediately immersing steel workpieces into a bath that has been heated and melted with zinc in advance to form a layer of zinc coating on the surface of workpieces after degreasing and derusting to present a dirt free and soakable surface.