rusted corten steel mesh for building facade cladding punching corten steel

 Weathering steel is a steel with improved atmospheric corrosion resistance. It is generally used for structures requiring extended longevity under low maintenance conditions. The product is produced to standards such as ASTM A242, A588, A606 Type 4 and EN 10025-5. This product is commonly referred to as COR-TEN, the original US Steel version. Alloys with small amounts of Cu, Cr, Ni, Si and P results in a steel that develops a stable rust layer that adheres to the base metal and is much less porous than rust which develops on carbon steel. The rust ‘patina’ develops under condition of alternate wetting and drying cycles to produce a protective barrier relatively impervious to further atmospheric corrosion. The appearance, texture and maturity of this coating depend on three interrelated factor: time, degree of exposure and atmospheric environment.