What are the characteristics of Color coated plate?

Color coated plate is a composite material based on metal substrates and coated with organic coatings on the surface, widely used in fields such as building exterior walls, industrial plants, and storage facilities. Its core function is to combine the strength of the metal substrate with the protective properties of the coating, achieving comprehensive performance such as corrosion resistance, UV resistance, and decorative properties, especially suitable for covering the exterior facade of steel structure buildings.

1、 Technical principles and core components

The production of color coated steel plates is based on cold-rolled steel plates or galvanized steel plates, and the surface is sequentially coated with primer, topcoat, and back coat through continuous roll coating process. Among them, the PVDF fluorocarbon coating used in Baosteel products is a key component, and the fluorocarbon bonds in its molecular structure have strong chemical stability, which can effectively resist the erosion of ultraviolet rays, acid rain, and industrial pollutants. In terms of coating, AZ150 aluminum zinc alloy coating (containing 15% zinc and 85% aluminum) further extends the substrate life through sacrificial anode protection mechanism. The substrate material TS350GD belongs to high-strength structural steel with a yield strength of 350MPa, which can meet the structural requirements of large-span buildings.

2、 Performance advantages and practical applications

Compared to traditional galvanized steel plates, the corrosion resistance of color coated plates is improved by 3-5 times. Laboratory accelerated corrosion testing shows that AZ150 coating can maintain no red rust for 2000 hours in salt spray environment, and with the 30-year warranty commitment of PVDF coating, it significantly reduces the maintenance cost throughout the entire life cycle. In the field of architecture, its lightweight characteristics (with a thickness of 0.6mm and a single board weight of approximately 4.7kg/㎡) can reduce the load on steel structures, while providing a wide range of color options (supporting RAL color card customization) to meet the aesthetic needs of architecture. In a practical case, a certain industrial park used Baosteel Color coated plate as the exterior wall of the factory building. After 5 years of outdoor exposure testing, the gloss retention rate of the coating still exceeded 85%, and there was no cracking or peeling phenomenon.

3、 Selection points and usage standards

When selecting, three key parameters should be focused on: coating type (AZ150 is suitable for corrosive environments such as coastal areas), coating type (PVDF fluorocarbon is suitable for long-term outdoor use), and substrate thickness (0.6mm is a commonly used specification for building exterior walls). The following specifications should be followed during the construction phase: special brackets should be used during transportation to avoid coating scratches, stainless steel self tapping screws and waterproof gaskets should be used during installation, and the overlap width between plates should be ≥ 200mm to prevent rainwater infiltration. It is worth noting that although Color coated plates have self-cleaning properties, long-term exposure to alkaline substances (such as cement) may still affect the coating performance. Therefore, surface residues need to be cleaned in a timely manner after construction.

4、 Technological iteration and industry trends

The current Color coated plate technology is developing towards higher weather resistance and functional integration. For example, some companies have developed nano coatings with self-cleaning function, which decompose organic pollutants through photocatalytic reactions; Another product reduces building energy consumption while maintaining color stability by adding infrared reflective pigments. Industry data shows that in 2023, the proportion of high weather resistance products in domestic Color coated plate production has exceeded 60%, reflecting the upgraded demand for long-term protective materials in the market.