by Sohini Ghosh

Posted on May 24, 2017 at 5:10 PM

CORTEN, otherwise called the weathering steel, was trademarked by the United States Steel Corporation (USS). This specific assortment is comprised of an alloy of steel compounds to do away with the need of consistent painting and allow the formation of rust. This very arrangement of rust, which as opposed to corrosion of the internal structure of the steel rather ensures the steel. Rust acts as a protective layer and prevents corrosion after long exposure to oxygen and moisture. Known for low upkeep, high strength and cost effective, is now being favoured for architectural purposes such as roofing, building bridges etc. It is said that the structures build with the help of CORTEN have proved the ability to withstand use for a long term with minimum upkeep. According to AISC, “this stable barrier layer greatly resists further corrosion, reducing it to a low value.”

The top reasons behind the growing popularity of CORTEN for architectural purposes are:

  • Seed Capital: Since these kinds of material do not require to be painted, it helps in avoiding builders coming in contact with hazardous paints; it lowers the material cost by almost 5 per cent.
  • Low Maintenance: Using CORTEN to build structures negates the requirement of painting the same and this leads to reduction of the cost of maintaining the structures. Since weathering steel does not require paint, builders can likewise avoid the medical problems concerning inorganic mixes found in specific paints.
  • Attractive Appearance: As mentioned in New York Times a few weeks before the Barclays Center, built with Corten, opened. Weathering steel structures, the article observed “can look suspiciously unfinished to the casual observer, [yet] has many fans in the world of art and architecture.” This particular variant of steel has been well accepted by the community of design engineers and architects, as the rust that develops on the steel beautifies it rather than destroying the internal structure.
  • Time taken for Construction: With the disposal of paint both on location and in the fabrication shop–construction is streamlined.
  • High Temperature Benefits: Steel can endure oxidation at temperatures over 400 deg C. This can be diminished by utilizing weathering steels. At temps over 400 deg C weathering steels shape a defensive patina. A run of the mill change would be an expansion of 50 deg C over identical misfortune in carbon manganese steels. Weathering steels are not reasonable for use in noteworthy load bearing individuals over 450 deg C.

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