Zoom on galvanized steel

What is galvanized steel?

Galvanized steel is a metal alloy essentially composed of iron and carbon, to which other elements such as chromium, nickel, manganese or molybdenum are added to optimize its resistance to corrosion and chemical aggression.

Despite the addition of these elements, galvanized steel is not yet rust resistant. To achieve this goal, manufacturers have developed the galvanizing process.

Galvanizing is the process of coating steel with a layer of zinc to protect it from rust. The most commonly used galvanizing process is hot-dip galvanizing, which involves immersing the steel in a bath of molten zinc at about 450ºC. This technique provides protection against rust both inside and outside.

There is also cold galvanizing, where the steel is coated with zinc-rich paints using spray guns, aerosol cans, brushes, or even brushes; however, the result is not as durable as hot-dip galvanizing.

The advantages of galvanized steel

Many industries use galvanized steel because it has several advantages:

- Corrosion resistance: galvanizing prevents moisture, chlorides and sulfides from damaging the steel.
- Cost: the least expensive of all treated steels.
- Durability: 20 years in harsh conditions where galvanized steel is often in contact with water. 50 years in an average environment.
- The possibility of using it as soon as it is delivered: no additional preparation is necessary.
- Low maintenance.

The many uses of galvanized steel

Galvanized steel has two types of finish: matte or metallic. This material has a high resistance to corrosion in humid environments, as well as to abrasion. It also offers low thermal conductivity compared to other materials. But be careful, it is advised not to combine it with non-galvanized steel because the zinc layer may disappear.

Galvanized steel can be used in many fields of application, whether in construction, telecommunications, automotive or in industries dedicated to renewable energy:

- Manufacturing of tools
- Roof covering
- Manufacture of gutters, gates, chimney ducts, sheds, plumbing, etc.
- Construction of engineering structures such as bridges

Discover our galvanized steel products available at Sedpa: corrugated sheet, ribbed sheet, tile panel, etc.

Do you have a question? Sedpa advises and guides you in the choice of your building materials. Contact us for more information.