Analysis of Weathering Steel Surface Treatment Technology: How to Improve Corrosion Resistance

Surface treatment technology is crucial for improving the corrosion resistance of weathering steel . Here are some key technologies and methods:

Rust stabilization treatment: Treating the surface of weathering steel with a specific solution can solve the problem of rust loss during the initial stages of exposed use. This treatment method accelerates the formation of a continuous and dense oxide layer on the surface of the weathering steel, thereby reducing the corrosion rate. For example, one study showed that after surface treatment, the corrosion rate of weathering steel was significantly reduced, and the open circuit potential also changed, indicating that a denser rust layer formed on the surface of the weathering steel.

Enrichment of alloying elements: In the rust layer of weathering steel, the enrichment of alloying elements such as Cu and Cr can improve the electrochemical protective performance of the rust layer, thereby enhancing the overall corrosion resistance of the weathering steel. This enrichment process facilitates the transformation within the rust layer, from -FeOOH to -FeOOH, further improving the protective performance of the rust layer.

The Influence of Hot-Rolled Oxide Scale: Oxide scale generated during the hot rolling process of weathering steel has a significant impact on the evolution of the rapidly stabilizing rust layer and its corrosion resistance. Studies have shown that by controlling the hot rolling process, the surface properties of weathering steel can be optimized, thereby affecting its corrosion resistance.

Corrosion kinetics studies: Investigating the corrosion kinetics during the formation of rust layers on weathering steel surfaces helps to understand the structure and evolution of rust layers. These studies reveal the weight gain (loss) of rust layers at different stages and how to optimize the performance of weathering steel by adjusting processing techniques.

In summary, these surface treatment technologies can significantly improve the corrosion resistance of weathering steel, making it more suitable for structural applications that are exposed to the atmosphere for extended periods.