Corten steel: a living and evolving material

01 — Corten steel

Corten steel is a material that evolves over time, its transformation process varying according to environmental conditions.
It is prized for its ability to develop a natural patina, giving it great resistance to bad weather.

Color variations observed may result from exposure to light and humidity.
We supply unoxidized or partially oxidized products, and full maturity or passivation may not be achieved initially.

These variations in appearance are particularly visible on parts that have undergone folding or welding, where the formation of patina is accelerated. Thus, significant differences in color can be observed between products from the same batch or between different surfaces of the same product.

02 — Corten transformation factors

The formation, adhesion and porosity of the patina on Corten steel are influenced by its composition as well as by various local climatic factors: Temperature, Humidity, Wind, Precipitation, Initial exposure time.

03 — Oxidation

During the patination process, an essential step is the elimination of oxides generated by corrosion.

This elimination is aided by rainwater runoff, which dissolves some of these oxides, creating streaks that can stain porous surfaces.

👉 It is therefore recommended to avoid placing Corten steel elements on light-colored floors or to opt for suitable protection.