Color steel coil materials are divided into five categories: packaging, household appliances, building materials, optical materials, and decorative materials. Among them, home appliance colored steel materials have fine craftsmanship and high production requirements. The thickness of the substrate and peritoneal coating is 0.02-0.05mm for a better color steel plate substrate, while the thickness of the film or coating is often only below 0.15mm.
Because the thickness of the substrate is crucial in terms of its impact on the service life of the color steel plate. When comparing the quality of color steel plates, price is one aspect, but don't pay too much attention to price. If the price of one type of color steel plate is much lower than others, then we need to pay attention. Use electrolysis equipment to degrease, acid wash, and then place the pipe fittings in a solution containing zinc salts, and connect the negative electrode of the electrolysis equipment.
Place a zinc plate on the opposite side of the pipe fitting, connect it to the positive pole of the electrolysis equipment, and connect it to the power supply. By using the directional movement of the current from the positive pole to the negative pole, a layer of zinc will be deposited on the pipe fitting. Cold plated pipe fittings are processed first and then galvanized. Due to the strong complexing ability of aminotriacetic acid on zinc, it significantly increases the cathodic polarization effect during zinc deposition, resulting in good dispersion and coverage ability of the plating solution, and a relatively bright coating.
After removing the oxide skin through acid washing, the finished product is rolled hard coil. Due to the cold work hardening caused by continuous cold deformation, the strength and hardness of the rolled hard coil increase, and the toughness and plasticity index decrease. Therefore, the stamping performance will deteriorate and can only be used for parts with simple deformation. Rolling hard coils can be used as raw materials for hot-dip galvanizing plants, and the cold formability of thick plates is directly related to the yield strength and elongation of the material. The lower the yield strength value, the smaller the stress required to produce deformation; The higher the elongation value, the higher the ductility, which can withstand large deformation without fracture.