热门关键词： 济南彩钢板 | 济南复合板 | 济南彩钢瓦 | 济南c型钢 | 济南钢结构 |
The factors affecting the quality of color steel plate are mainly reflected in the poor quality of substrate, the change of coating surface tension, improper pretreatment, curing defects, coating defects and scratches. The color steel plate produced from cold-rolled substrate has limited corrosion resistance, because any slight scratch on the surface coating will soon appear red rust and affect its use.
The color coating of this substrate can be used to make internal parts of household appliances or low temporary isolation bars. Therefore, the quality of color steel plate mainly depends on the selection of substrate. Cold rolled substrate, electro galvanized substrate, hot-dip galvanized substrate and aluminized zinc steel plate can be used as substrates. Materials with appropriate mechanical properties shall be selected according to different purposes.
In addition to the quality of raw materials, the quality of color steel plate is also closely related to the process technology of products. If we want to have a good quality of color steel plate on the premise of ensuring the same raw materials, we must ensure that the production technology is advanced.
Degreasing - washing - surface adjustment (optional) - drying - chemical conversion membrane treatment - drying. Spray / impregnation process is generally used in the early stage.
Due to the protection of zinc layer, the corrosion resistance of color steel plate of electro galvanized substrate is higher than that of color coated plate of cold rolled substrate. Due to the thin zinc layer (generally zinc content is 20g / m2), its processability is better than that of hot-dip galvanizing. When making products and components requiring corrosion resistance, the color coated plate with electro galvanized steel plate as the substrate can be considered. Such as the inner and outer components of air conditioner, washing machine or refrigerator shell; Walls, furniture, lighting fixtures, signs, etc. for interior decoration. We all know that the color of color coated galvanized sheet is diverse. The problems of coloring and how to control the color difference of color coated galvanized sheet are all the problems that our manufacturers need to overcome, and they are also the key to ensure product quality.
In addition to the impregnation method in the third step, the chemicals are applied by spraying method. The post-treatment generally contains chromium. After the post-treatment, not only the excess residue on the surface of the coil is removed, but also a layer of chromium containing compound can be formed on the surface, which improves the corrosion resistance of the coil. When the aluminum coil material is applied, the film weight is 30-65mg / MZ. Most of the post-treatment of this process also uses chromium containing compounds.