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The Difference Between Galvanized Coil And Galvalumed Coil

The difference between galvanized coil and Galvalumed coil
A layer of zinc material is evenly distributed on the surface of the galvanized sheet, which acts as an anodic protection for the base metal, that is to say, the alternative corrosion of the zinc material protects the use of the base metal. Here, zinc is like an important The meat shields around the characters must be sacrificed before the central characters turn.

A layer of zinc material is evenly distributed on the surface of the galvanized sheet, which acts as an anodic protection for the base metal, that is to say, the alternative corrosion of the zinc material protects the use of the base metal. Here, zinc is like an important The meat shields around the characters must be sacrificed before the central character.

The surface coating of the galvanized sheet is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. At the microscopic level, the galvanized coating exhibits a honeycomb structure, and the "honeycomb" composed of aluminum contains Zinc, in this case, although the aluminum-zinc coating also plays the role of anodic protection, on the one hand, due to the reduction of zinc content, on the other hand, because the zinc material is wrapped by aluminum, it is not easy to be electrolyzed, so the role of anodic protection is greatly reduce. Here, galvanized zinc is like body armor for important missions. Once a point is broken, the protection at that point is gone. Therefore, once the galvanized sheet is cut, the protection of the cut edge is basically lost, so it will rust quickly. Therefore, the galvanized sheet should be cut as little as possible. Once cut, apply anti-rust paint or Zinc-rich paint protects the edges, so that the service life of the board can be extended.

04 (2)
04 (1)

The surface coating of the galvanized sheet is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. Under the microscopic level, the galvanized coating exhibits a honeycomb structure, and the "honeycomb" composed of aluminum contains Zinc, in this case, although the aluminum-zinc coating also plays the role of anodic protection, on the one hand, due to the reduction of zinc content, on the other hand, because the zinc material is wrapped by aluminum, it is not easy to be electrolyzed, so the role of anodic protection is greatly Reduce. Here, galvanized is like body armor for important missions, once a point is broken, the protection at that point is gone. Therefore, once the galvanized sheet is cut, it is basically lost at the cut edge Therefore, the galvanized sheet should be cut as little as possible. Once cut, use anti-rust paint or zinc-rich paint to protect the edges to prolong the service life of the sheet.

1. Ordinary pure zinc coating products (GI) Ordinary hot-dip galvanized products can be divided into ordinary spangle, small spangle, no spangle and smooth surface products according to the surface state. Because of its good corrosion resistance, excellent processing and forming performance, low production cost, and beautiful appearance, it is widely used in construction, automobiles, home appliances and other industries. Especially for small spangle and no spangle coating products, the surface grains are fine, dense, smooth, and have better coating and corrosion resistance, especially for home appliances, color coating and other industries.

2. Zinc Aluminium Alloy Coated Sheet (GF)
Zinc-aluminum alloy coated sheet is also called low-aluminum galvanized steel sheet, and the coating contains
5% Al, 95% Zn, and traces of rare earth elements. The main advantages are that the plasticity and adhesion of the coating are very good, and the corrosion resistance before and after deformation is unchanged; the atmospheric corrosion resistance is 2 to 3 times that of conventional hot-dip galvanized sheets, and it has good coatability and weldability. Among all galvanized sheets, it has the best toughness, corrosion resistance and formability comparable to electro-galvanized sheets. This product is mainly used for corrosion-resistant and weather-resistant environments and coating material substrates.

3.Aluminum-zinc alloy coated plate (GL) The coating structure of the aluminum-zinc alloy coated plate is Al-Zn alloy, and the coating composition is 55% Al, 43.3% Zn, 1.6% Si. Its surface is smooth and has excellent atmospheric corrosion resistance, which is 2-6 times higher than the same hot-dip galvanized sheet. It has high temperature corrosion resistance similar to hot-dip aluminum plate, and can be used for a long time without any discoloration or deformation at a high temperature of 315 degrees. The water corrosion resistance is better than that of the hot-dip galvanized sheet and the hot-dip aluminized sheet, and the soil corrosion resistance is better than that of the hot-dip galvanized sheet. Its thermal reflectivity is higher than 75%, which is twice that of ordinary galvanized sheet. It has good paintability and processability, and is gradually replacing galvanized sheet and is widely used in the world.

4. Hot-rolled galvanized sheet - hot-rolled galvanized sheet is a galvanized sheet produced directly by pickling and galvanizing with hot-rolled sheet as the substrate. The board can be widely used in construction, automobiles, steel silos, railway passenger cars, highway guardrail boards, etc. At present, the domestic production of hot-rolled galvanized sheet is relatively small, and most of the galvanized production lines that have been completed and put into production are galvanized sheet with cold-rolled sheet as the substrate. Compared with cold-rolled galvanized sheet, the difference in performance between hot-rolled galvanized sheet and cold-rolled galvanized sheet is not very big. Because hot-rolled galvanized sheet saves the cold rolling process, the production cost is lower, and it has obvious price advantage.


Post time: Mar-09-2022

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