耐候耐候墙板

Corten wall cladding refers to exterior or interior wall panels made from weathering steel (耐候钢). These panels are designed to develop a stable rust-like surface layer that not only provides a unique architectural appearance but also protects the steel underneath from further corrosion.

A key feature of corten wall cladding is the controlled rust layer formation process, which can be natural or artificially accelerated.

Why the Rust Layer Is Important

与普通钢材不同的是生锈, the corten steel rust layer is:

• 致密稳定
• 与表面牢固粘合
• Protective rather than destructive
• Visually decorative
• Self-regenerating under correct conditions

This rust layer is what makes corten steel suitable for long-term architectural wall systems.

Main Rust Layer Formation Methods

There are two main methods used to create the corten steel rusted surface:

• Natural weathering process
• Artificial pre-rusting process

1. Natural Weathering Process

This is the most traditional method, where the steel develops its rust layer naturally after installation.

流程步骤:

步 1: Initial Installation (Bare Steel Surface)

• Fresh corten panels have a dark grey or black appearance
• Surface may include mill scale from rolling process

步 2: Exposure to Weather Conditions

The steel is exposed to:

• Rainwater
• Oxygen in air
• Humidity changes
• Temperature cycles

步 3: Active Oxidation Stage

• Rust spots begin to appear
• Surface color changes from grey to brown
• Oxidation spreads unevenly

步 4: Rust Layer Development

• Orange-brown rust gradually covers the surface
• Repeated wet-dry cycles accelerate formation
• Iron oxide layers form on the surface

步 5: Stabilization Stage

• Rust layer becomes dense and compact
• Color stabilizes into deep orange-brown tone
• Further corrosion slows significantly

2. Artificial Pre-Rusting Process

对于建筑项目, a controlled rust appearance is often required before installation.

为什么要使用预锈

• Achieve uniform color before installation
• Avoid uneven rust stains on building site
• Speed up decorative effect
• Ensure consistent architectural appearance

Pre-Rusting Methods:

方法 1: Water Spraying Oxidation

• Steel panels are repeatedly sprayed with water
• Exposure to air accelerates oxidation
• Controlled wet-dry cycles form rust layer

方法 2: Saltwater or Chemical Treatment

• Mild oxidizing solutions are applied
• Surface reaction is accelerated
• Rust layer forms more quickly and evenly

方法 3: Controlled Humidity Chamber

• Panels are placed in controlled environment
• Temperature and humidity are regulated
• Uniform rust development is achieved

3. Rust Layer Stabilization Treatment

生锈后, some panels undergo stabilization:

• Cleaning loose rust particles
• Controlling runoff during early rain exposure
• Optional sealing treatment (for indoor use)

This helps maintain:

• Color consistency
• Surface cleanliness
• 结构稳定性

4. Surface Protection Options

Depending on design requirements, corten wall cladding may include:

Natural Finish

• No coating applied
• Rust continues to stabilize naturally outdoors

Sealed Rust Finish

• Transparent protective coating
• Reduces rust runoff
• Preserves color appearance

Indoor Decorative Finish

• Fixed rust color
• Prevents further oxidation changes

5. Key Factors Affecting Rust Layer Quality

The final rust appearance depends on:

• Climate conditions (湿度, 雨量)
• 空气污染程度
• 接触时间
• Steel composition (铜, 铬, Ni content)
• 表面处理质量
• Drainage design of the building

6. Common Applications of Corten Wall Cladding

Architectural Facades

• Building exterior walls
• Commercial facades
• Cultural buildings

景观设计

• 花园围墙
• Outdoor screens
• Park installations

Interior Decoration

• Feature walls
• Industrial-style interiors
• Restaurant and hotel design

7. Advantages of Controlled Rust Layer

• Unique natural aesthetic
• No paint required
• Low maintenance requirement
• 长期耐用
• Environmentally friendly surface treatment