In the modern industrial field, Gi Steel Coil occupy an important position due to their outstanding performance and are widely used in industries such as construction, automobiles, and home appliances.
Gi Steel Coil is a metal coil with a zinc layer coated on the surface of cold-rolled steel plate. This zinc layer can effectively prevent steel from rusting and extend its service life. Its main production processes include hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing is widely used. First, the surface of the steel is treated, then it is immersed in molten zinc at 450℃ - 480℃ to form a zinc-iron alloy layer and a pure zinc layer. After that, it undergoes cooling, leveling and other treatments. Electro-galvanizing utilizes the principle of electrochemistry. In an electroplating tank, zinc ions are deposited on the surface of steel to form a layer. The coating is uniform and the thickness is controllable. It is often used for products with high surface quality requirements.
Outstanding anti-corrosion performance is the prominent advantage of Galvanized Coil. The zinc oxide film formed by the zinc layer can isolate corrosive media. Even if the zinc layer is damaged, as the potential of the zinc electrode is lower than that of iron, it will oxidize preferentially, protecting the steel substrate through cathodic protection. Under normal atmospheric conditions, the service life of hot-dip Galvanized Coil is several times longer than that of ordinary steel. Meanwhile, it also has excellent weather resistance and can stably maintain its performance in environments such as high and low temperatures, acid rain, and salt spray. It has excellent machinability and can adapt well to both cold working and welding. The coating consistency is reliable, which is conducive to the stability of product quality and subsequent processing. From an economic perspective, although the procurement cost is slightly high, its long service life and easy processing make its comprehensive benefits high. And it has good recyclability and meets the requirements of sustainable development.
Details of multi-field applications
(1) construction industry: Building stability and beauty
In the construction industry, Galvanized Steel Coils can be regarded as "All-round players". In the construction of high-rise office buildings, h-shaped steel and i-beams made of Galvanized Steel Coils are used as building frames, which can withstand huge vertical and horizontal loads. Their anti-corrosion performance ensures the structural stability of the building for 50 years or even longer in service life. For instance, a certain super high-rise landmark building uses hot-dip Galvanized Coil with a zinc coating thickness of 275g/m² to build its framework, effectively resisting the erosion of the complex urban atmospheric environment.
In terms of roofing materials, aluminized zinc color steel plates are widely used in industrial plants and large commercial buildings. The surface of this type of board is treated with a special coating, which not only offers rich colors but also has excellent weather resistance and self-cleaning properties. Take a warehouse in a certain logistics park as an example. The roof is made of aluminized zinc color steel plates. After 10 years, it still maintains a good appearance and waterproof performance, greatly reducing maintenance costs. In the field of interior decoration, Gi Steel Coil, after artistic processing, are used to make ceiling keels and decorative lines. With their high strength and plasticity, they can create a variety of complex shapes.
(2) automotive industry: Safeguarding safety and durability
The automotive industry's reliance on Cold Rolled Galvanized Steel Coil penetrates every key component. In the manufacturing of vehicle bodies, high-strength galvanized steel coils are used in key parts such as door anti-collision beams and a/b/c pillars. During a collision, they can effectively absorb energy and enhance the safety performance of the vehicle. For instance, for a best-selling model of a certain brand, the proportion of galvanized steel used in the body reaches 80%, and it has received a five-star safety rating in the rigorous crash test.
The frame and suspension components of the chassis system are made of galvanized steel coils, which can resist the impact of road debris and the corrosion of muddy water. Taking the road environment in northern winters where de-icing agents are frequently used as an example, the service life of galvanized steel chassis components is 3 to 5 years longer than that of ordinary steel. In addition, for the outer covering parts such as the engine hood and trunk lid of a car, the excellent stamping performance of galvanized steel coils can be utilized to achieve complex curved surface shapes while ensuring the adhesion and durability of the paint surface.
(3) home appliance industry: Shaping quality and durability
In the home appliance industry, Cold Rolled Galvanized Steel Coil quietly safeguard the quality and lifespan of the products. The evaporator bracket and shelves inside the refrigerator are made of electro-galvanized steel coils. Due to their smooth surface and no zinc streaks, they will not contaminate food and can remain rust-free for a long time in a humid environment. The internal structural components of a well-known refrigerator brand use electro-galvanized steel coils with a zinc coating thickness of 12μm, ensuring a service life of more than 10 years for the refrigerator.
The drum of the washing machine is made of high-strength Cold Rolled Galvanized Steel Coil. After being formed by a special process, it can withstand the huge centrifugal force generated by high-speed rotation and resist the corrosion of detergent and water at the same time. The outdoor unit shell of the air conditioner is made of hot-dip galvanized steel coil. In the salt spray environment of coastal areas, combined with weather-resistant coating, it can ensure stable operation for more than 15 years and reduce maintenance costs caused by shell rust.
(4) communication equipment field: Ensuring stable signal transmission
In the field of communication equipment, Galvanized Coil are a solid backing for the stable transmission of signals. 5g base station towers are usually constructed with large-sized galvanized angle steel and round steel. These steels need to undergo strict hot-dip galvanizing treatment, with a zinc coating thickness of no less than 85μm, to ensure they can stand firm in severe weather conditions such as strong winds and heavy rain. For instance, in the southeast coastal areas where typhoons occur frequently, galvanized steel base station towers effectively ensure the uninterrupted operation of the communication network.
The cable tray of the communication equipment is made of Galvanized Coil, which has excellent electromagnetic shielding performance, can prevent signal interference and protect the cables from environmental corrosion at the same time. In addition, the antenna bracket is custom-processed with galvanized steel coils. Its high-precision dimensions and stable structure ensure that the antenna can precisely point under different climatic conditions and guarantee the quality of signal transmission.
At present, the global Galvanized Coil market is experiencing a boom in both supply and demand. Emerging economies have seen a significant increase in demand, and developed countries also have stable demand. China holds an important position in production, but the market competition is fierce.
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Post time: Jun-16-2025