Corten Steel is a special steel originally developed for bridge building and skyscraper construction due to its incredible strength. It develops a protective rust appearance on exposure to the weather, creating warm rich textures not always associated with metal.If this protective barrier is compromised, it will simply form a new skin to protect itself. Corten Steel is extremely durable and has a far higher resistance to atmospheric corrosion than other steels, making it is ideal for use in fire-pits, planters and water features. When you first receive your Corten Steel products they may arrive in an un-weathered or partly weathered or completely weathered condition. Once placed outside the weathering process will begin
The protective patina layer cannot form, however, if the surface of the steel is continuously damp or dirty. • Surfaces of weathering steel can be painted using the same methods applied in ordinary steels. As a result of the special alloying of the steel, a coating may last twice as long as a coating on ordinary steel. If Cor-Ten steel is continuously exposed to water, it is generally recommended to be painted. Nonetheless, the painting process requires the steel surface to be completely free of oxide through preferably mechanical abrasion.
• Imposed weight on building structure must be considered.
• Material should be kept as clean as possible and away from mud, grease, oil, paint, concrete, mortar and other substances to minimise cleaning costs.
• In almost all cases where the Cor-Ten steel is used as a façade cladding, this is used as rainscreen system installed on a substructure or rail system typically specified in other architectural metal. Joining different metals may induce galvanic corrosion. Galvanic corrosion occurs when two metals with different electrolytic potential come into contact in the presence of an electrolyte such as water. The table below summarises the risks of pairing Cor-Ten steels with other metals commonly used in facades. The recommended option is to use fasteners or substructure made of weathering steel. If this is not possible, it is suggested to use nylon spacers among materials to avoid direct metallic contact.