A588 weathering steel plate characteristics

Compared with ordinary carbon steel, A588 weathering steel has better atmospheric corrosion resistance. This is due to the fact that the analyzed elements reduce the resistivity of the rust layer and hinder the rapid growth of corrosion products.

The corrosion resistance of A588 weathering steel plate shows that after long-term use, its corrosion resistance is remarkable. Alloying elements that improve the atmospheric corrosion resistance of steel should meet the following conditions.

The solubility of A588 weathering steel in iron is larger than that in rust layer, and it can form solid solution with iron, which can increase the potential of steel. According to the research results of relevant literature, the influence of the analyzed elements on the atmospheric corrosion resistance of A588 weathering steel is not the same.

A588 weathering steel is different from ordinary steel, and it will rust on the surface like ordinary steel at the beginning. Due to the high degree of alloying, this process is faster than ordinary steel. However, due to the complex internal lattice of weathering steel, a layer of deep black dense rust layer is formed under the loose rust layer on the surface. The rust layer consists of α-Fe0OH nanoparticles. In this uniform rust layer, nickel atoms replace part of the iron atoms, making the rust layer cation-selective and inhibiting the penetration of corrosive anions.

Specially designed alloying elements in A588 weathering steel provide a protective layer, thereby producing corrosion inhibition. The protective layer on the surface of weathering steel will slowly grow and regenerate with the influence of weather. In short, the steel knot is covered by scale to form a protective layer.

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