Weather-resistant steel plates have relatively strong weather resistance. There are many main factors that affect the quality of weather-resistant steel plates, such as substrate, poor quality, changes in coating surface tension, improper pretreatment, curing defects, coating defects and scratches.
The corrosion resistance of weather resistant steel plates produced by cold-rolled substrates is limited, because any slight scratches on the surface coating will quickly appear red rust, which will affect the use. The color coating of this substrate can be used to make internal parts of household appliances or temporary guardrails with low height. Therefore, the quality of weather resistant steel plate mainly depends on the choice of substrate.
In addition to the influence of raw materials on quality, the quality of weather resistant steel plate has a great relationship with the technology of the process. If we want to make the quality of weather resistant steel plate good, we must ensure the level of craftsmanship, degreasing, water washing, surface conditioning, drying, chemical conversion film treatment and early drying generally use spray or immersion processes.
Due to the protection of the galvanized layer, the weather-resistant steel sheet with the galvanized layer is higher than the cold-rolled color-coated steel sheet. Because the zinc layer is thin, the processing performance is better than that of hot-dip galvanizing. When manufacturing products and parts that meet the requirements of corrosion resistance, you can consider using galvanized steel sheet as a color-coated sheet.
