Oxidation Resistance of A588 Grade B Weathering Steel

Weathering steel, often referred to by the genericized trademark COR-TEN steel and sometimes written without the hyphen as corten steel, is a group of steel alloys which were developed to eliminate the need for painting, and form a stable rust-like appearance after several years exposure to weather.

A588 grade B is a high-strength low-alloy weathering steel grade, offering strong corrosion resistance and increased atmospheric corrosion resistance thanks to its high copper content. It also offers high strength and machinability, as well as improved weldability compared to other metals such as carbon steel.

The oxidation resistance of A588 grade B weathering steel is its most important characteristic. This grade of steel has the ability to form a protective barrier against the oxidizing effects of the environment. This protective barrier prevents the formation of rust, which can lead to corrosion and eventual failure of the material.

The oxidation resistance of A588 grade B can be enhanced with the use of a special coating system. The coating system consists of two layers; a zinc-rich primer and a top layer of a long-life finish. The zinc-rich primer acts as a barrier to the corrosive effects of the environment, while the finish provides a layer of corrosion-resistant protection, which helps to protect the steel against corrosion in extreme weather and environment conditions.

The oxidation resistance of A588 grade B is generally better than lower grades of steel, although it can vary depending on the environment. The brand of steel chosen, the manufacturing process, and even environmental conditions can affect its oxidation resistance.

When subjected to high temperatures, A588 grade B may become more susceptible to oxidation. However, this can be prevented through the use of protective coatings or post-weld heat treatments.

Overall, A588 grade B has excellent oxidation resistance and is a good choice for applications that require a durable, corrosion-resistant material. Its high strength and machinability, as well as improved weldability, make it an ideal choice for a wide range of applications, from bridges and buildings to transportation equipment.