Prepainted steel sheets are a very mature industrial material. Prepainted steel sheets feature lightweight, high structural strength, corrosion resistance, and customization options. People widely use the steel sheets in the construction and manufacturing industries.
In the manufacturing sector, people have used prepainted steel panels to produce product casings, containers, and piping equipment. In the construction sector, prepainted steel panels are extensively applied to the exterior walls or roofs of steel structure buildings.
Due to their lightweight, high strength, and corrosion-resistant characteristics, the wall and roof panels made of color steel effectively protect the structural integrity of buildings from external environmental influences, extending the lifespan of the buildings. Additionally, the surface and color of color steel panels can be customized, making buildings with color steel wall panels or roofs more aesthetically pleasing.
Prepainted steel sheets consist of a base steel panel, an electroplated layer, a chemical conversion layer, and a coating. These elements will influence the quality of color steel panels.
Factors affecting the quality of sheets
Base steel panels generally use 316, 304, or 201 grade steel. These types of steel are well-established products with stable performance and internationally recognized quality standards. Using them as base panels can effectively balance production costs and performance.
The mainstream coatings for color steel panels include zinc coatings, zinc-aluminum coatings, and aluminum-magnesium-zinc coatings. By adding various rare metal elements, the steel panels will endow different capabilities. For example, the addition of a zinc-aluminum coating enhances the steel panel’s corrosion resistance. The aluminum-magnesium-zinc coating is a new generation coating that provides enhanced capabilities such as resistance to red rust and self-healing of cut surfaces.
Finally, the color coating on the outermost layer of color steel panels varies greatly depending on the quality of the paint.
Currently, the most common coating on the market is polyester coating. This type of coating has good adhesion and a wide variety of colors. Furthermore, due to mature technology, the production cost of polyester coatings is the lowest. Compared to ordinary polyester coatings, silicon-modified polyester coatings offer greater hardness, wear resistance, and heat resistance.
High-durability polyester coatings are an upgraded technology of ordinary polyester coatings, maintaining their advantages of good adhesion and rich colors, while also offering good UV resistance and anti-chalking capabilities. This product has excellent cost-performance ratio.
Fluorocarbon coatings represent the latest generation of technology and are considered high-end coatings. Fluorocarbon coatings have exceptional UV resistance, allowing them to be used outdoors without chalking or peeling for 20 years. Additionally, fluorocarbon coatings have strong solvent resistance, able to withstand corrosion from highly corrosive liquids including acids, alkalis, seawater, and gasoline.
Harbin Dong’an Building Materials Company is a leading manufacturer of color steel panels in China. Leveraging China’s strong industrial manufacturing capabilities, Dong’an continuously supplies the market with high-quality color steel panels.
Leave A Comment