Hot -dip galvanizing is one of the most effective means to delay the environmental corrosion of steel materials. Compared with other metal protection methods, it is based on the protection characteristics of the combination of physical barriers and electrochemical protection in the plating. The density, durability, maintenance and economy of plating, and its adaptability to the shape and size of the product have unparalleled advantages.
At present, hot -dip galvanized products mainly include steel plates, steel bands, steel wires, steel pipes, etc. Among them, hot immersive galvanized steel plates accounted for the largest proportion. For a long time, the hot -dip galvanized process has been favored by people due to its low -plating cost, excellent protection characteristics and beautiful appearance. , Electricity, aviation and marine engineering.
Process process
Workpiece → Skinid → Washing → Pickle → Washing → Aid -Plumbing solvents → drying heat → hot galvanized → sorting → cooling → drift → drying → inspection
Technical advantage
1. The surface of the entire steel is protected. Regardless of the corner of the tube parts or any other coating, it is easy to uniformly covered with zinc.
2. The hardness value of galvanized layer is larger than steel, so its impact and abrasion consuming are quite good.
3. Compared with other coatings, zinc layers are often thicker than other places in the corner area, and have good toughness and abrasion consuming.
4. Even due to great mechanical damage or other reasons. Causes a small part of the zinc layer to fall off and expose the iron base. At this time, the surrounding zinc layer will exert the function of sacrificing anode to protect the steel here and make it from eroding. The other coating is just the opposite. The rust will be generated immediately, and it quickly extends to the coating, causing the coating to peel off.
5. The consumption of the zinc layer in the atmosphere is very slow, and its life span is far more than any other coating.
6. In a particular environment, the plating life is mainly depends on the thickness of the plating layer. The thickness of the plating layer is determined by the thickness of the steel, that is, the thicker steel is easy to get thicker coating. Therefore, the thick steel parts in the same steel structure must also get a thicker coating to ensure a longer life.
7. Due to beauty, art, or use in a specific severe corrosive environment, the galvanized layer can apply the above paint to Duplex System. As long as the paint system is selected correctly, the construction is easy, and its corrosion effect is compared to separate paint and heat -soaking zinc alone. The life span is 1.5 ~ 2.5 times better.
8. Use the zinc layer to protect steel. Compared with other methods, hot -dip galvanizing is the most widely used, the best anti -corrosion effect, and the best economic benefits.
