Why is the anti-corrosion coating on the edges of the columns always severely damaged?
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The following shows the steel structure of petrochemical production units; as can be seen from the diagram, the anti-corrosion coating on the edges of the columns is always severely damaged How to avoid it?
Structural optimization – Chamfering: After the steel is cut and before painting, it is required that all sharp edges be polished to create corners with a radius of R≥2mm. This is the most crucial step, as it ensures continuous coverage of the edges by the coating. Optimize node design: Minimize horizontal steel channels and angles with edges where water tends to accumulate. If it cannot be avoided, drainage holes should be created at the lowest points to prevent accumulated liquid from soaking the coating for an extended period. Avoid closed cross-sections: For columns, if conditions permit, circular tubes can be considered as an alternative to H-shaped steel, as they lack sharp edges and generally offer better corrosion resistance. Switch to a high-performance paint