Galvanised steel

Galvanised steel

Let's talk about Galvanised steel. This is a type of processed steel with a treatment at the end of which it is covered with several layers of zinc. These zinc layers protect the steel by preventing it from rusting. Galvanized steel is also a material with a more durable, scratch-resistant finish that is more attractive to many consumers. Galvanized steel is used in the manufacture of SIESA concertinas.

How is this made?

To be able to manufacture Galvanised steel First, the pieces of wire of the type required are made. Then some galvanizing technique is applied, such as:

Dip or hot galvanizing: This is the most common method and consists of immersing the steel in molten zinc. During this immersion a chemical reaction occurs in which permanent bonds are formed between the steel and the zinc. When it cools, there are only outer layers of zinc, then there are mixed layers of steel and zinc, and inside there is only steel.

continuous galvanized: This technique passes thin sheets or steel wires through molten zinc; It is still a form of immersion but a thinner layer of zinc is achieved.

electrolytic galvanized: It is a procedure by which a layer of Zinc is deposited on metal parts by means of a controlled direct current. Electrolytically galvanized steel has excellent formability and can be joined by welding.

Depending on the technique used, the bonds between zinc and steel are more or less numerous and deep. This parameter is measured by the degree of galvanization which is described as the amount of zinc per surface area, rather than the thickness of the outer zinc layer.

What advantages does the galvanization?

Zinc makes the piece of steel stronger by protecting it in two ways. On the one hand, zinc is very resistant to oxidation while iron, one of the main components of steel, oxidizes quite easily in contact with oxygen in the air and much more so with water and humidity. Creating a layer of zinc on the steel prevents oxygen from reaching the iron or at least slows down the process to a great extent. This protection is accentuated with the progressive formation of the patina, a layer of oxides and other zinc compounds. Zinc is also a very durable metal that resists scratching and offers a satin appearance that can make the galvanized steel finish more attractive to many consumers.

The duration of a piece of galvanized steel can depend on several factors. A piece of industrial galvanized steel with a zinc layer just 0,1 mm thick can last up to 70 years under normal conditions and without the need for special maintenance.

In addition to being durable and strong, galvanized steel is inexpensive and can be recycled multiple times, making it widely used for a wide variety of purposes.

At SIESA we use this galvanization process for our concertinas, SIESA, we also have type 404 and 300 steel as well as carbon steel. Effective for high resistance to corrosion and damage caused by the environment that ensure the protection of your facilities, having a long useful life without maintenance costs.


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