Color-coated galvanized steel coil knowledge sharing

Color-coated galvanized steel coil is a product obtained by coating an organic coating on a steel plate. It has good colorability, formability, corrosion resistance and organic compound decoration, as well as high strength and easy processing of steel plates. It is a deep-processing product of the iron and steel industry, and it is a high-efficiency and energy-saving steel. In recent years, high-quality, multi-purpose, color-coated galvanized steel coils have developed rapidly.
Color-coated galvanized steel coils are generally made of hot-dip galvanized steel coils and hot-dip galvanized steel sheets, which are mainly processed into corrugated cardboard or sandwich panels that meet polyurethane and are used to build industrial and commercial buildings such as steel structure factories, airports, warehouses, and freezers. Roofs, walls, and doors. Color plates for household appliances generally use galvanized plates and cold plates, which are used in the production of refrigerators, large air-conditioning systems, freezers, bread machines, furniture, etc.
The transportation industry generally uses galvanized sheets and cold sheets as substrates, mainly for oil pans, automotive interior parts, etc. Substrate pretreatment If the galvanized steel coil used as the substrate is not directly subjected to the color coating process after production, it may cause rust (white rust), dust, and other pollution during transportation. If these cannot be removed, it will affect the color coating quality. The quality and various physical and chemical properties of the finished color-coated roller are closely related to the pretreatment. In addition, after galvanizing, oil should be applied to prevent rust, and these oils should also be removed before color coating.
1. The site or warehouse of color-coated galvanized steel coils should be kept in a clean and unobstructed place, away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed from the site to keep the steel clean.
2. Do not use acid, alkali, salt, concrete and other raw materials that are easy to attach to the color-coated galvanized steel coil and do not pile up in the warehouse. Different types of color-coated galvanized steel coils should be stacked separately to avoid confusion and contact corrosion.
3. Large and medium-sized channel steel, guide rails, thick steel plates, large-diameter steel pipes, and steel castings can all be stacked in the open air.
4. Large, medium and small channel steels, wire rods, construction steel bars, medium-sized seamless steel pipes, stainless steel wires, galvanized steel wire ropes, etc. can be stored in well-ventilated material arches that must be opened and closed.
5. Some small and medium-sized stainless steel plates, cold-rolled steel plates, square pipes, steel chains, ferrite cores, caliber or thick-walled seamless steel pipes, various cold-rolled and cold-drawn stainless steel plates and their high-cost metals can be stored in the warehouse.
6. Warehouses should be selected based on physical geographic criteria. A general closed warehouse is usually used. Existing warehouses have roofs and courtyard walls.
7. In the warehouse, it is stipulated that natural ventilation should be paid attention to in sunny days, waterproofing should be paid attention to in rainy days, and an appropriate natural storage environment should be maintained at all times.
8. Reasonable stacking, first in first out.
1) The principle requirement for the stacking of color-coated galvanized steel coils is to stack them according to the variety and specification under the condition that the stacking is stable and safe. Materials of different varieties should be stacked separately to prevent confusion and mutual corrosion.
2) The bottom of the stack should be high, stable, and flat to prevent the material from being damp or deformed.
3) The same materials should be stacked separately according to the warehouse receipt so as to facilitate the implementation of the first-in-first-out principle
4) There must be wooden pads or stones under the section of steel stacked in the open air; the stacking surface is slightly inclined to facilitate drainage, and the materials should be placed flat to prevent bending deformation.
5) The stacking height of manual operation shall not exceed 1.2m, that of mechanical operation shall not exceed 1.5m, and the stacking width shall not exceed 2.5m.
6) There should be a certain channel between the stacks. The inspection channel is generally 0.5m, and the access channel is generally 1.5~2.0m, depending on the size of the material and the transport machinery.
7) Raise the bottom. If the warehouse is a sunny concrete floor, the height of the pad can be 0.1m. If it is mud, it must be 0.2~0.5m high. If it is an open field, the cement floor shall be raised 0.3 ~ 0.5m, and the sand and mud surface shall be raised 0.5~0.7m
8) The angle steel and channel steel stacked in the open air should be laid down; that is, the mouth should face down, and the I-beam should be upright.