Cold-Dip Galvanized Steel Sheet
Cold-dip galvanized steel sheet, also known as electro-galvanized steel sheet, commonly uses high-quality cold-rolled steel as its base material. Manufacturers mainly offer standard forming grades, deep-drawing grades, and high-strength series. Commonly used materials according to national standards include DC01, DC02, and DC06.
Cold-dip galvanized steel sheet has a thin and uniform coating, a smooth and delicate surface without zinc spangles, and its flatness and appearance are far superior to hot-dip galvanized sheet, making it ideal for exterior parts. It boasts high dimensional accuracy, straight sheet shape, and stable performance in precision stamping, laser cutting, CNC bending, and other processing methods, resisting cracks and deformation. It also exhibits excellent welding and coating adhesion. Products treated with fingerprint-resistant and phosphating processes have strong anti-fouling capabilities, leaving no traces to the touch, effectively enhancing the finished product's aesthetics. Furthermore, the cold-dip galvanizing process offers high controllability, allowing for flexible adjustment of the coating thickness according to requirements. The overall cost is moderate, offering better value than stainless steel, effectively controlling production costs while meeting usage requirements.
Hot-dip galvanized steel sheet vs cold-dip galvanized steel sheet
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Comparison Items: |
Hot-dip galvanized steel sheet |
Cold-Dip Galvanized Steel Sheet (electro-galvanized) |
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Production Process |
The steel sheet is immersed in molten zinc at approximately 450℃, where a zinc layer adheres through a metallurgical reaction. |
Utilizing the principle of electrolysis, zinc ions are deposited onto the surface of the steel sheet at room temperature. |
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Zinc Coating Thickness |
Relatively thick, typically 60-600 g/m², commonly 120/180/275 g/m² |
Relatively thin, generally 10-50 g/m², with a uniform and thin coating. |
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Rust Resistance |
Strong rust resistance, long service life, suitable for outdoor high-corrosion environments |
Basic rust prevention, only basic corrosion protection, not suitable for long-term outdoor use. |
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Surface Appearance |
Distinct zinc bloom, average flatness, relatively rough surface |
No zinc spangles, smooth, delicate, and flat surface, with an exquisite appearance. |
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Substrate Material |
Q195, Q235, Q345, DC01-DC06, high-strength steel, etc. |
DC01-DC06, SECC, SECD, SECE, high-strength cold-rolled steel, etc. |
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Adhesion Strength |
The zinc layer is metallurgically bonded to the steel sheet, with strong adhesion and is not easily detached. |
Physical adhesion, weak adhesion, easily chipped by impacts. |
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Processability |
Can be bent, welded, and cut, suitable for structural component processing. |
High dimensional accuracy, suitable for precision stamping, laser cutting, and painting. |
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Applicable Environment |
Suitable for harsh environments such as outdoor exposure, coastal salt spray, industrial corrosion, and low temperatures. |
Suitable for dry, clean indoor environments free of corrosive media. |
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Product Price |
Relatively higher cost. |
Slightly lower cost. |
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Typical Applications |
Applications include building railings, photovoltaic brackets, factory purlins, bridge components, and pipelines. |
Applications include: appliance housings, computer cases, home appliance interiors, instrument panels, and office cabinets. |
Product Applications
Cold-Dip Galvanized Steel Sheet is a material featuring a corrosion-resistant zinc layer formed on the steel surface through an electro-galvanizing process. Characterized by its low cost, smooth surface finish, and excellent formability, it is widely utilized in light-duty corrosion protection applications and for structural components within indoor environments.
1. Home Appliance Manufacturing
Used for components such as refrigerator back panels, washing machine casings, and outdoor air conditioner unit brackets; offers excellent formability and surface paint adhesion.
2. Light Steel Structures
Suitable for non-load-bearing architectural components, including indoor framing studs, light steel partition walls, and suspended ceiling systems.
3. Automotive Components
Used for interior structural parts, mounting brackets, and specific corrosion-resistant areas that are not exposed to the external environment.
4. Electrical and Electronic Equipment
Applied in the manufacture of distribution box enclosures, equipment cabinets, and control panels—products where specific requirements for rust resistance and processing precision are essential.
5. Hardware and Stamped Parts
Widely utilized for stamped components, cabinet accessories, ventilation ducts, and various general hardware structural parts.
6. Packaging and Light Industrial Products
Used for shelving units, display racks, metal packaging structures, and a diverse range of light industrial manufactured goods.
Hot Tags: Cold-Dip Galvanized Steel Sheet, Galvanized Steel Coil, GI Sheet Manufacturer
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