Galvanized sheet refers to a steel sheet with a layer of zinc on the surface. Galvanizing is an economical and effective rust prevention method that is often used. About half of the world's zinc production is used for this process. So, according to different production processes and processing methods, what types of galvanized steel sheets can be divided into?
The thin steel sheet is immersed in a molten zinc tank to make a thin steel sheet with a layer of zinc adhered to its surface. It is mainly produced by continuous galvanizing process, that is, the rolled steel sheet is continuously immersed in a molten zinc plating tank to make a galvanized steel sheet;
Features:
- Excellent corrosion resistance: thick zinc layer can effectively prevent rust.
- Strong adhesion: the zinc layer is firmly bonded to the substrate and resists peeling.
- Economical and practical: long service life and reduced maintenance costs.
Application field：
Hot-dip galvanized steel sheets are mainly used in building materials, outdoor facilities, transportation, etc.
This steel sheet is also made by hot dip method, but after leaving the tank, it is immediately heated to about 500℃ to form an alloy film of zinc and iron. This galvanized sheet has good adhesion and weldability of the paint;
Features:
- Stronger corrosion resistance: The alloy coating can provide higher corrosion resistance.
- Excellent surface finish: The appearance is more beautiful.
Application areas:
- High-end architectural decoration, automobile shell, home appliance shell, etc.
Electrogalvanizing is to plate zinc on the surface of the steel sheet by electrolytic deposition to form a thinner zinc layer. The specific operation is to put the steel sheet into the electrolytic cell, and then pass the current to deposit zinc ions on the surface of the steel sheet.
Features:
- Smooth surface: The coating is uniform, suitable for high-gloss products.
- Low cost: The production cost is relatively low.
Application areas
Home appliance shell, light industrial products, furniture, etc.
Single-sided galvanizing means galvanizing on only one side, while double-sided differential galvanizing means galvanizing on both sides, but the coating thickness is different.
Features:
- Single-sided galvanizing: suitable for applications that require high corrosion protection on one side.
- Double-sided differential galvanizing: can reduce costs while maintaining a certain degree of corrosion protection.
Application areas:
Manufacturing, construction industry.
Alloy galvanized steel sheets are galvanized after alloying treatment, and galvanized steel sheets refer to galvanized sheets combined with other materials (such as coatings, plastics, etc.).
Features:
- Alloy galvanizing: better corrosion resistance and beautiful appearance.
- Galvanized steel sheets: combine the advantages of multiple materials and have multiple properties.
Application areas:
Home appliances, transportation facilities, special equipment, etc.
Colored galvanized steel sheets are galvanized steel sheets with colored paint on the surface. The specific operation method is to first clean and polish the surface, and then use spraying or roller coating to apply colored paint for processing.
Features:
- Aesthetics: A variety of colors are available, suitable for decorative needs.
- Corrosion resistance: Color coating also enhances corrosion resistance.
Application areas
Architectural decoration, home products, billboards, etc.
Printed painted galvanized steel sheet is printed or painted on galvanized steel sheet. The specific operation method is to ensure the surface is smooth first, and then use screen printing or other coating processes for processing.
Features:
- Personalization: A variety of patterns and designs can be achieved.
- Strong decorativeness: Improve the appearance of the product.
Application areas
Furniture, home appliances, advertising devices, etc.
PVC laminated galvanized steel sheet is a combination of PVC material and galvanized steel sheet. The specific operation is to first perform steel plate surface treatment, and then laminate the PVC material on the galvanized steel sheet.
Features:
- Excellent corrosion resistance: The PVC layer further improves the corrosion resistance.
- Aesthetics: A variety of colors and styles are available.
Application fields
Construction, home appliances, exterior wall decoration, etc.
Galvanized steel sheets can be divided into 8 categories according to production and processing methods, among which hot-dip galvanized steel sheets are the most widely used and well-known type of steel sheets.
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