Pre Rusted Corten Steel

Предварительно ржавая кортеновская сталь

Окси Кортен Окси Кортен
Ржавая кортеновская сталь Ржавая кортеновская сталь

The red rust of pre-rusted Corten steel is the result of a контролируемый процесс окисления, where the material transitions from dark gray to bright orange and finally to deep reddish-brown. This color evolution reflects the formation of a стабильный, alloy-enhanced oxide layer, which not only defines its aesthetic appeal but also ensures long-term durability in outdoor environments.

Категория:

Pre-rusted Corten steel refers to weathering steel that has already undergone контролируемое окисление, forming the characteristic red rust (патина) before delivery or installation. This process highlights both the visual transformation and the scientific mechanism behind the material.

Color Changes of Corten Steel Rust

The rust color of Corten steel evolves gradually as oxidation progresses:

1. Начальный этап (Fresh Steel)

  • Цвет: Темно-серый / синевато-черный

  • Поверхность: Metallic, иногда с окалиной

2. Раннее окисление

  • Цвет: Светло-оранжевый

  • Появление: Uneven spots or patches

  • Причина: First reaction between iron and oxygen

3. Developing Rust Layer

  • Цвет: Bright orange to orange-brown

  • Поверхность: More uniform, slightly rough

  • This stage is visually vibrant and often preferred for decorative effects

4. Стабильная патина

  • Цвет: Deep reddish-brown to dark brown

  • Поверхность: Dense and uniform

  • Функция: Acts as a protective barrier

Why the Color Changes

The variation in color is caused by different types of iron oxides forming over time:

  • Fe₂O₃ (hematite): Red to reddish-brown tones

  • Fe₃O₄ (magnetite): Darker, almost black tones

  • Hydrated oxides: Contribute to orange hues in early stages

As the rust layer matures, the composition stabilizes, resulting in the deep, rich brown color associated with fully weathered Corten steel.

Formation Mechanism of the Red Rust Layer

Шаг 1: Oxidation Reaction

Железо реагирует с кислородом и влагой:

  • Фе + О₂ + H₂O → iron oxides (ржавчина)

Шаг 2: Alloying Element Influence

Corten steel contains:

  • Медь (Cu)

  • Хром (Кр)

  • Никель (В)

These elements:

  • Refine the structure of the rust layer

  • Reduce porosity

  • Improve adhesion to the steel surface

Шаг 3: Формирование защитной патины

  • Слой ржавчины становится compact and stable

  • Limits further oxygen and water penetration

  • Slows down corrosion rate significantly

Key Characteristics of Pre-Rusted Corten Steel

  • Uniform appearance achieved before installation

  • Eliminates the need for on-site weathering time

  • Reduces runoff staining during early oxidation

  • Provides both decorative and protective functions

A588 Кортен

Кортеновская пластина

Кортеновская пластина