Coated steel has an extra layer of metal, paint, or both to protect it from rust and wear. It is ideal for those who are looking for resistant, aesthetic, light, and cost-effective materials in industries such as construction, automotive, white goods, and other growing sectors.

Steel Coating Process:

Inception

The basis of most coated steel is cold-rolled steel.
The sheet is covered with a metallic and/or non-metallic coating to prevent rust and corrosion that humidity and contamination can cause on the steel.
Metallic coatings can consist of a zinc layer (Zintro) or alloys of zinc and other materials such as aluminum (Zintro Alum).
Galvanization

Galvanization can be done by immersion in molten metal or by electrochemical processes.
The process starts with the placement of cold-rolled steel sheets.
The edge of each roll is trimmed to remove imperfections.
Then, it goes through alkaline or direct flame cleaning process to eliminate residues such as oil or particles.
The sheet is then transported to a continuous annealing furnace to recover structural properties and ductility.
It is then immersed in a molten metal crucible in which coating is adhered to; excess liquid metal is swept off with air or gas.
Finally, the sheet is given a surface finish, treated with a chemical solution to protect the coating, a thin layer of oil oxide is applied, and then it is rolled.
Electrogalvanization

Electrogalvanization consists of immersing the material in an electrolytic solution of zinc chloride and passing an electric current through it.
The current passage causes the zinc to adhere to the surface of the steel sheet and coat it.
Painting

Non-metallic coatings such as paint form a film that protects and embellishes the alloy when it dries (Pintro).
Cut and Finish

The production process ends with the cut or form into rolls, sheets, and strips of rectangular, square, circular, and triangular designs, among others.
In addition, surface finishes and other treatments can be applied for specific uses.

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