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The interaction between magnets and galvanized steel is a topic that involves materials science and the principles of magnetism. First of all, we need to understand that the reason why magnets can adsorb certain metals is because these metals are magnetic, or they can be magnetized and attracted to magnets. However, as a non-magnetic metal, zinc does not attract magnets.
Galvanized steel is a special kind of steel whose manufacturing process involves plating a layer of zinc on the surface of ordinary steel. This process is usually done by hot dip galvanizing, in which the steel is dipped into a molten zinc solution that adheres to the steel surface and forms a protective layer. The main function of this layer of zinc is to provide anti-corrosion function and protect the steel from the external environment, thus significantly extending the service life of the steel.
Because zinc is a non-magnetic material, when the magnet is near the galvanized steel, the galvanized layer itself will not be attractive to the magnet. This means that if only the galvanized layer is considered, the magnet will not adhere to the galvanized steel. The reality, however, may be more complicated. If the substrate beneath the galvanized layer is magnetic steel, and the zinc layer is not thick enough to completely isolate the magnetic force between the magnet and the substrate, then the magnet may "stick" to the galvanized steel in this indirect way. This is because the magnet attracts the magnetic part of the substrate, which generates enough force to keep the magnet on the galvanized steel surface.
In the plating process, in order to improve the performance and appearance of galvanized steel, other surface treatment techniques may be used. For example, some galvanized steel may be further treated and covered with a black protective film, which not only provides additional anti-corrosion effect, but also improves the appearance of the product. However, this protective film is also usually non-magnetic, so it also does not affect the adsorption capacity of the magnet.
Whether the magnet will stick to the galvanized steel mainly depends on two factors: first, whether the steel under the galvanized layer is magnetic, and second, whether the thickness of the zinc layer is sufficient to prevent direct contact between the magnet and the magnetic substrate. If these two conditions are met, then it is possible for the magnet to be indirectly adsorbed on the galvanized steel through the magnetic substrate. On the contrary, if the galvanized layer is thick enough, or the substrate itself is not magnetic, then the magnet will not stick to the galvanized steel
The main use of galvanizing is to prevent metal surface corrosion and oxidation.
Mainly used in the following fields:
Construction: Galvanized steel is widely used in the construction industry, such as building frames, roofs and walls. This is because galvanized steel has corrosion resistance and durability, which can extend the service life of the building.
Automotive industry: Galvanized steel is widely used in the automotive manufacturing industry, such as the manufacture of body and chassis. This is because galvanized steel can prevent the corrosion and oxidation of metal parts of the car, thereby extending the service life of the car.
Electrical industry: Cable tubes and cable jackets are usually made of galvanized steel pipes. This is because galvanized steel pipe has corrosion resistance and durability, and can be used in different environments for a long time.
Agriculture and aquaculture: Galvanized steel wire mesh and galvanized steel pipe are widely used in the agriculture and aquaculture industry, such as for fences, poultry houses and livestock houses. This is because galvanized steel wire mesh and galvanized steel pipe can prevent rust and corrosion, thereby extending the service life.
Machinery industry: Galvanized steel plates and galvanized steel pipes are widely used in the machinery manufacturing industry, such as the manufacture of mechanical parts and pipes. This is because galvanized steel plates and galvanized steel pipes have good anti-corrosion properties, which can extend the service life of mechanical equipment.
1. the reliability of galvanized steel plate is good, galvanized layer and steel is metallurgical combination, become a part of the surface, so the durability of the coating is more reliable.
2. galvanized steel plate has corrosion resistance. Galvanized steel plate is to prevent corrosion on the surface of the steel plate to extend its service life, coated with a layer of metal zinc on the surface of the steel plate, this zinc coated steel plate is called galvanized steel plate. Galvanizing is an economical and effective rust prevention method that is often used, and about half of the world's zinc production is used in this process. Galvanized steel plate is an important steel anti-corrosion plate, not only because zinc can form a dense protective layer on the surface of the steel, but also because zinc has a cathodic protection effect, when the galvanized layer is damaged, it can still prevent the corrosion of the iron base material through cathodic protection.
3. galvanized steel coating toughness, galvanized layer forms a special metallurgical structure, this structure can withstand mechanical damage during transport and use.
Galvanizing is the process of adding a layer of zinc to the outer surface of a metal. The idea is to add a protective coating to the underlying metal, reducing the likelihood of corrosion or rust.
Galvanizing process varies with specific technology. However, the most important part of the process is that it usually involves enclosing steel or iron in zinc, which may be in a liquid or dust-like state. When zinc is introduced, the iron in the surrounding metal reacts with the zinc to form a tightly bonded alloy coating.
