How to improve the properties of weathering steel

Rare earth elements can refine the grain, change the state of inclusions in weathering steel, reduce the number of harmful inclusions and reduce the corrosion source, so as to improve the atmospheric corrosion resistance of steel.

The corrosion effects of different weathering elements on different environments are different. For example, molybdenum is effective in reducing the corrosion rate of industrial atmosphere, but its anti-corrosion effect on marine atmosphere is not obvious. Therefore, according to the different corrosive environments, weathering steel develops to be specific and special-purpose, and its composition system changes accordingly, so as to improve the effectiveness and application efficiency of weathering elements. Seawater corrosion resistant steel, marine corrosion resistant steel, acid corrosion resistant steel and tropical corrosion resistant steel are the representatives of this kind of steel. Therefore, weathering steel should also be diversified.

Surface treatment technology can also improve the performance of weathering steel. Develop coating materials that match the weathering steel substrate, and its corrosion resistance will be doubled.