Galvanized strip steel is a raw material called (zinc, aluminum) coated to varying degrees on long and narrow steel plates that have been cold-rolled or hot-rolled.
Hot dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life. The hot-dip galvanized strip steel substrate undergoes complex physical and chemical reactions with the molten plating solution, forming a corrosion-resistant and tightly structured zinc iron alloy layer. The alloy layer is integrated with the pure zinc layer and the strip steel substrate. Therefore, it has strong corrosion resistance.Galvanized steel strip is processed by ordinary steel strip pickling, galvanizing, packaging and other processes. Due to its good anti-corrosion performance, it is widely used. Mainly used for making metal products that are cold processed without galvanizing. For example, metal products such as light steel keel, guardrail net peach shaped column, sink, rolling shutter door, bridge frame, etc.
Post treatment of galvanized steel strip
The post-treatment of galvanized strip steel includes three aspects: passivation, pre phosphating, and oil coating. Firstly, passivation treatment should be carried out on the galvanized steel strip, which can improve the surface structure and gloss of the galvanized layer, enhance the corrosion resistance and service life of the galvanized layer, and improve the adhesion between the coating and the base metal. The passivation treatment mainly adopts chromate passivation. Add some activators such as fluoride, phosphoric acid, or sulfuric acid to the passivation solution to obtain a thicker chromate film after passivation. When fluoride is present in the passivation solution, it can reduce the surface tension of the steel strip, accelerate the film formation reaction, and increase the chemical polishing effect, making the passivation film finer and brighter.
Galvanized strip steel model and material
Common models
DX51D+Z: General purpose galvanized strip steel, suitable for general processing and forming. DX52D+Z: Stamping grade galvanized steel strip with better ductility, suitable for complex stamping parts. DX53D+Z: Deep drawn galvanized strip steel, used in high demand fields such as automotive parts. SGH340/SGH400: High strength galvanized strip steel, commonly used in steel structure buildings. Material classificationSubstrate material: commonly used low-carbon steel (such as SPCC, Q195, Q235), high-strength steel (HX340LAD). Coating type: Hot dip galvanizing (GI): The zinc layer is thick (40-275g/m ²) and has strong corrosion resistance. Electrogalvanizing (EG): The zinc layer is uniform (10-50g/m ²), the surface is smoother, and it is suitable for precision machining.
Specification parameters of galvanized strip steel
Galvanized strip steel comes in various specifications and can be customized according to specific needsThickness range: 0.12mm~4.0mm (commonly 0.3mm~2.5mm).Width range: 20mm~1500mm (the width after longitudinal cutting can be accurate to ± 0.1mm).Weight of galvanized layer: double-sided coating 40g/m ²~275g/m ² (such as Z60, Z180, etc.).Roll weight: usually 3-15 tons/roll, inner diameter 508mm or 610mm.
The application effect of galvanized strip steel meets modern needs and is widely used as a building material today. Galvanized strip steel has the characteristics of being rust free and corrosion-resistant for many years. It can maintain its performance and appearance without being affected by adverse external environments. In the process of using galvanized steel strip, in order to improve its operational efficiency and self characteristics, post-treatment can be carried out on the finished galvanized steel strip to enhance its performance.
Application of galvanized steel strip
Strip steel is divided into two categories based on the material used: ordinary strip steel and high-quality strip steel; According to the processing method, it can be divided into two types: hot-rolled strip steel and cold-rolled strip steel. Strip steel is widely used in the production of welded steel pipes, as raw materials for cold-formed steel, and in the manufacturing of bicycle frames, wheels, clamps, washers, spring plates, saw blades, hardware products, and blades.
General civilian use.
Processing household appliances, such as sinks, can reinforce door panels, or strengthen kitchen utensils, etc. Construction industry. Light steel keel, roof, ceiling, wall, waterproof board, rain shelter, rolling shutter door, warehouse interior and exterior panels, insulation pipe shell, etc. Household Electric Appliances. Reinforce and protect household appliances such as refrigerators, washing machines, showers, and vacuum cleaners. The automotive industry. Components of large cars, trucks, trailers, luggage carts, refrigerated trucks, garage doors, wipers, mudguards, fuel tanks, water tanks, etc. Industrial sector. As a substrate for stamping materials, it is used in bicycles, digital products, armored cables, and other fields. Other aspects. Equipment box covers, electrical cabinets, instrument panels, office furniture, etc.
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