In the process of using s355j2wp weathering steel, the initial stage is the same as ordinary steel, corrosion occurs, but the corrosion speed gradually becomes slower. After a certain period of time, the corrosion of s355j2wp weathering steel is almost no longer carried out, thus achieving the purpose of protecting the substrate. The phenomenon is called stabilization of the rust layer, and the rust layer of the s355j2wp weathering steel in this state is called a stabilized rust layer.
From the influence of corrosion products on the corrosion process of s355j2wp weathering steel, the atmospheric corrosion of s355j2wp steel plate is the process of electrochemical reaction of oxygen in the air through the rust layer of s355j2wp steel in the presence of water film. The rust layer is composed of a loose outer rust layer and a dense inner rust layer. The alloying elements in the s355j2wp weathering steel mainly act through the influence of the inner rust layer.
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