Corten Cladding Cost Per M2

The rust on Corten steel cladding does not continuously fall off. While there may be some loose rust during the early oxidation stage, it eventually forms a stabile, tightly bonded patina. This is the key feature that gives Corten steel its long-lasting durability and low maintenance, making it a reliable choice for exterior cladding applications.

Categoria: Acciaio Corten

Descrizione

Nel valutare Corten steel cladding, one common concern is whether the rust layer will fall off or stain surrounding areas. The answer depends on the stage of oxidation and environmental conditions.

Does Corten Steel Rust Fall Off?

Short Answer

Early stage: SÌ, some loose rust may appear and can wash off
Stable stage: NO, the rust layer becomes dense and firmly bonded, and does not flake off

Why Rust Behavior Changes

1. Early Oxidation Stage

When Corten steel is newly installed:

The rust layer is loose and porous
Rainwater may carry rust particles, causing runoff stains
Surface color is bright orange and uneven

This stage is temporary and part of the natural weathering process.

2. Patina Formation Stage

Mentre l'esposizione continua:

Alloying elements such as Cu, Cr, e Ni modify the rust structure
The oxide layer becomes compatto e aderente
The surface transitions to reddish-brown

At this point, the rust layer acts as a barriera protettiva.

3. Stable Stage

After full weathering:

Rust is firmly attached to the steel surface
No flaking or peeling like ordinary carbon steel
Minimal or no runoff under normal conditions

Comparison with Ordinary Steel

Aspetto	Acciaio Corten	Ordinary Steel
Rust structure	Dense and stable	Loose and flaky
Adhesion	Forte	Weak
Flaking	Minimal after stabilization	Continuous
Protezione	Self-protecting	Corrosion continues