Oxi Corten

Oxi Corten refers to the unique behavior of Corten steel when exposed to oxygen. Instead of continuous corrosion, it undergoes a processo de oxidação controlada, formando um camada protetora de ferrugem estável. This interaction with oxygen is the key reason behind its durability, making it ideal for outdoor applications such as garden planters, architectural facades, e estruturas paisagísticas.

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Oxi Corten is an informal way to describe Aço corten (Aço intemperativo) due to its strong interaction with oxigênio (O₂) in the air. The name comes from the fact that its most important characteristic—its protective rust layer—is formed through oxidação controlada.

Why Is Corten Steel Associated with Oxygen?

Corten steel is called “oxygen steel” because:

  • It reacts with oxygen and moisture in the atmosphere

  • This reaction creates a camada de óxido estável (rust patina)

  • Ao contrário do aço comum, the oxidation process is self-protecting rather than destructive

Em termos simples, oxygen does not weaken Corten steel in the same way it corrodes regular carbon steel—it actually helps protect it.

What Happens When Corten Steel Reacts with Oxygen?

1. Oxidação Inicial

When exposed to air and water:

  • Ferro (Fé) reacts with oxygen (O₂)

  • Formulários óxidos de ferro (ferrugem)

  • Surface begins to change from dark gray to orange-brown

2. Formation of Patina Layer

Due to alloying elements such as:

  • Cobre (Cu)

  • Cromo (Cr)

  • Níquel (Em)

A camada de ferrugem torna-se:

  • Dense and adherent

  • Less porous than normal rust

  • Capable of blocking further oxygen and moisture penetration

3. Stabilization

Ao longo do tempo:

  • The oxidation slows down

  • UM camada protetora estável forms

  • The steel reaches a balance between oxidation and protection

Comparação: Corten Steel vs Ordinary Steel in Oxygen

Aspecto Aço Corten Aço Carbono Comum
Reaction with oxygen Controlled oxidation Continuous corrosion
Rust layer Denso, protetor Loose, flaky
Corrosion rate Decreases over time Increases over time
Vida útil Long in outdoor use Requires coating or protection

Mecanismo Chave

  • O oxigênio inicia o processo de ferrugem

  • Elementos de liga modificam a estrutura do óxido

  • A camada final de ferrugem torna-se um barreira, não é uma fraqueza

É por isso que o aço Corten é frequentemente descrito como “aço autoprotetor”.

Prato Corten

Prato Corten

Corten B