Corrosion resistance of S355J2WP weathering steel plate

In the process of using S355J2WP weathering steel plate, the initial stage is the same as ordinary steel, and corrosion occurs, but the corrosion rate gradually decreases. After a period of time, the corrosion of S355J2WP weathering steel plate almost no longer proceeds, thereby achieving the purpose of protecting the substrate. This phenomenon is called the stability of the rust layer, and the rust layer of S355J2WP weathering steel plate in this state is called the stable rust layer.

From the perspective of the effects of corrosion products on the corrosion process of S355J2WP weathering steel plate, atmospheric corrosion of S355J2WP weathering steel plate is an electrochemical reaction process of oxygen through the rust layer of S355J2WP weathering steel plate in the presence of a water film. The rust layer is composed of a loose outer rust layer and a dense inner rust layer. The alloying elements in S355J2WP weathering steel plate are mainly affected by the internal rust layer.