The S355J0W steel specified by EN10025-5 European standard is suitable for welding, bolting and riveting parts, and these parts have good resistance to atmospheric window corrosion at ambient temperature. Except for products delivered in delivery status N, S355J0W steel does not undergo heat treatment. Stress relief annealing is allowed. S355J0W atmospheric corrosion resistant structural steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers.
Applicable environment of S355J0W atmospheric corrosion resistant structural steel
The anti-corrosion effect of the automatic protective oxide layer is related to natural factors and special classification and the concentration of alloying elements in it. The resistance to atmospheric corrosion depends on the self-protective oxide layer based on the base metal during periods of continuous dry and humid weather conditions. Environmental and other conditions mainly provide protection for the location of the structure.
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S355J0W steel supply should go deep into the design and surface automatic protective oxide layer structure manufacturing and unimpeded regeneration, including corrosion of unprotected steel is the designer’s responsibility. It is also necessary to increase the thickness of the product in order to counteract the corrosion, and it should also be included in its calculations. within.
When the specific chemical content is in the air, the structure is in contact with water for a long time, is exposed to moisture or is used in the nautical atmosphere, it is meaningful and necessary to recommend conventional surface protection. Under comparable conditions, steel with improved atmospheric corrosion-resistant paint has lower corrosion infectivity than conventional structural steel. The surface of the structure that is not exposed to the elements may be affected by aggregation and concentration. Proper ventilation should be provided. In addition, proper surface protection is required. The scope of these factors that mainly depend on climatic conditions in a broad sense and the description of the structure do not allow any statement that is generally valid during the corrosion process. Therefore, users should consider the appropriate protection of the steel manufacturer in the application of individual products.
