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Help CenterSteel Coil & Strip & Pre-Painted Steel Coil,TDC51D+Z、TDC52D+Z、SPCC、SGCC
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I. Product Overview
Pre-painted steel coil (also known as pre-coated steel coil or color steel coil) is a functional metal coil made by taking cold-rolled steel sheets, hot-rolled steel sheets, galvanized steel sheets, etc., as the base material, going through pre-treatment processes such as surface degreasing, phosphating, and passivation, then uniformly applying one or more layers of organic coatings (primer and topcoat) by roller coating, and finally curing by baking. The product combines the high strength and easy processability of the metal base material with the corrosion resistance and decorative advantages of the organic coating. It is an energy-saving and environmentally friendly building and industrial material integrating protection and aesthetics, widely used in various scenarios, which can greatly reduce subsequent construction costs and extend the service life of the product.
II. Core Structure (From Inside to Outside)
Base Material Layer: The core load-bearing layer. Cold-rolled steel coil (CRC), hot-rolled steel coil (HRC), hot-dip galvanized steel coil (GI), aluminum-zinc coated steel coil (GL), etc., can be selected according to requirements, with a thickness range of 0.12mm-2.0mm. The base material determines the overall strength, toughness and basic corrosion resistance of the product. Among them, galvanized/aluminum-zinc coated base materials can further improve the rust resistance of the product.
Pre-treatment Layer: Including three layers of degreasing, phosphating and passivation, it is the key to the combination of the coating and the base material. Degreasing removes oil stains and dust on the surface of the base material, phosphating forms a uniform phosphating film to enhance the adhesion of the coating, and passivation further improves the corrosion resistance of the base material itself, preventing oxidation reaction between the base material and the coating, and extending the service life of the product.
Primer Layer: Located between the pre-treatment layer and the topcoat layer, its main function is to enhance the adhesion between the topcoat and the base material, and at the same time have certain corrosion resistance and UV resistance, blocking the contact between moisture, air and the base material. The commonly used primers are epoxy primer and polyester primer, with a coating thickness of 3-5μm, ensuring synergistic effect with the topcoat and improving the overall protection effect.
Topcoat Layer: The surface decoration and main protection layer of the product. Different types of coatings (polyester, fluorocarbon, silicone-modified polyester, etc.) can be selected according to requirements, with a coating thickness of 8-20μm. The color can be customized (such as white gray, sea blue, crimson, dark gray, etc.), and surface textures such as flat coating, frosted, wood grain, stone grain, etc., can be selected, which has both decoration, weather resistance and stain resistance.
Protective Film Layer (Optional): The surface of some products will be covered with a PE protective film with a thickness of 0.03-0.05mm, which is mainly used to protect the topcoat layer during transportation and processing, prevent scratches, wear and pollution, and can be torn off after construction without affecting the appearance and performance of the product.
III. Main Specifications and Parameters
Parameter Category |
Specific Specifications |
Description |
Base Material Thickness |
0.12mm-2.0mm |
The conventional thickness is 0.3mm-0.8mm, and special thickness can be customized according to customer requirements |
Coil Width |
1000mm, 1200mm, 1250mm |
Standard width, which can be slitted and cut according to processing needs |
Coil Weight |
2-5 tons/coil |
Calculated according to thickness, width and coil diameter, coil weight can be customized |
Coating Type |
Polyester (PE), Fluorocarbon (PVDF), Silicone-modified Polyester (SMP), High Weather-resistant Polyester (HDP) |
Different coatings correspond to different weather resistance, suitable for different application scenarios |
Coating Thickness |
Primer: 3-5μm, Topcoat: 8-20μm |
Coating thickness can be adjusted according to corrosion protection requirements |
Color |
Conventional colors (white gray, sea blue, crimson, etc.), Pantone colors can be customized |
Uniform color, small color difference, in line with industry standards |
Surface Texture |
Flat coating, frosted, wood grain, stone grain, orange peel texture, etc. |
Improve decorative effect, suitable for different decoration styles |
Service Life |
5-10 years indoors, 8-20 years outdoors |
Depends on coating type, service environment and maintenance conditions |
Model, Specification and Grade |
Conventional grades: TDC51D+Z, TDC52D+Z, SPCC, SGCC, etc. |
Corresponding national/industry standard grades can be matched according to base material type and coating requirements, customization is supported |
IV. Core Performance Advantages
Excellent Corrosion Resistance: Through multiple pre-treatment and coating protection, it can effectively resist the erosion of atmosphere, rainwater, humidity, acid and alkali and other environments, avoid rusting of the base material. Compared with ordinary steel plates, the service life is greatly extended, and the later maintenance cost is reduced.
Strong Decorativeness: Rich colors can be customized, and surface textures are diverse. It can be directly used as a decorative surface without additional painting, suitable for different architectural styles and industrial product appearance requirements, and improving the overall aesthetics.
High Strength and Easy Processability: Retaining the high strength and toughness of the metal base material, it can be subjected to various processing processes such as cutting, bending, stamping, rolling and welding, suitable for different construction scenarios, with high construction efficiency and shortened construction period.
Energy Saving and Environmental Protection: Environmentally friendly coatings are used in the production process, with no harmful gas emissions. The product can be recycled and reused, in line with the requirements of green buildings and environmental protection; at the same time, the coating has good heat insulation and sound insulation performance, which can reduce building energy consumption.
High Cost Performance: It has both protection, decoration and processing performance. One-time investment, long service life, no frequent maintenance in the later period. Compared with traditional coating construction, it can save labor and material costs, with outstanding comprehensive cost performance.
Good Weather Resistance: High-quality coatings (such as fluorocarbon, high weather-resistant polyester) can resist ultraviolet radiation and high and low temperature changes, not easy to fade, chalk and crack, suitable for long-term outdoor use, especially for harsh environments.
V. Application Scenarios
1. Construction Industry (Core Scenario)
Roof System: Roof paving of factories, warehouses, gymnasiums, toll stations and other buildings. It can be combined with insulation layer to achieve heat insulation effect, with both waterproof, corrosion resistance and beauty.
Wall System: Exterior wall decoration, interior wall partition, prefabricated houses, wall panels of integrated houses, replacing traditional tiles and coatings, with convenient construction and good decorative effect.
Others: Ceilings, enclosures, balcony railings, canopies, garage entrances, etc., with both protection and decoration functions.
2. Industrial Field
Equipment Shells: Shells of home appliances (refrigerators, washing machines, air conditioners), electrical equipment shells, mechanical equipment protection shells, corrosion-resistant, easy to clean, and improving the appearance texture of products.
Packaging Industry: High-end packaging coils, metal packaging containers, colors and textures can be customized, with both protection and decoration.
Others: Production line equipment protection plates, workshop partitions, storage shelves, etc.
3. Other Scenarios
Agricultural greenhouses, breeding factories, temporary buildings, landscape facilities (billboards, signboards), etc. Suitable base materials and coatings can be selected according to scene requirements to achieve the dual needs of protection and decoration.
VI. Product Standards
The product production strictly follows national and industry standards, mainly referring to the standards: GB/T 12754-2019 "Pre-painted Steel Sheets and Strips" and GB/T 2518-2019 "Continuous Hot-dip Galvanized and Zinc Alloy Coated Steel Sheets and Strips", ensuring stable product quality and up-to-standard performance, and third-party inspection reports can be provided.
VII. Storage and Transportation Notes
Storage: It should be stored in a dry, ventilated and cool warehouse, avoiding outdoor storage to prevent rainwater immersion and sun exposure; the coils should be placed flat, and the stacking height should not be too high (no more than 3 layers) to avoid extrusion deformation; keep away from acid, alkali and corrosive substances to prevent coating damage.
Transportation: The coils should be fixed firmly during transportation to prevent rolling and collision of the coils, avoid scratching and wearing the surface coating; rainproof measures should be taken during rainy days transportation to prevent rainwater penetration leading to rusting of the base material; handle with care during handling to avoid mechanical damage.
Construction: The surface protective film (if any) should be torn off before construction, and sharp objects should be avoided from scratching the coating during construction; protective measures should be taken during cutting and bending to avoid coating peeling; the surface dust and stains should be cleaned in time after construction to extend the service life of the product.
VIII. Customization Service
Parameters such as base material thickness, coil width, coil weight, coating type, color, surface texture, model, specification and grade can be customized according to customers' specific needs; at the same time, slitting, cutting, bending and other processing services are provided to adapt to different construction and use needs. Bulk orders are supported, the delivery cycle is 5-7 days, and perfect after-sales guarantee is provided.
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