Weathering steel is a kind of low alloy high strength steel which has good corrosion resistance in atmosphere by adding a small amount of alloying elements to ordinary steel. The atmospheric corrosion resistance of weathering steel can be 2-8 times that of ordinary carbon steel, and the longer the service time, the more prominent the corrosion resistance. Weatherability refers to the chemical composition of these steels, which are able to exhibit higher resistance to atmospheric corrosion compared to other steels. This is because steel forms a protective layer on its surface when exposed to the weather.
The corrosion inhibition of the protective layer is due to the specific distribution and concentration of alloying elements in it. It is not clear how the formation of copper rust differs from normal rusting, but it has been established that drying of wetted surfaces is necessary and that copper is the most important alloying element.
Weathering steel not only has good weather resistance, but also has excellent mechanical, welding and other properties. The atmospheric corrosion resistance of weathering steel is much higher than that of ordinary carbon steel, which is widely used in manufacturing industries such as containers, Bridges, automobiles, railway vehicles and construction. Therefore, there is still a lot of room for development in the application field of weathering steel.
Now there are many building outer layer is made of weatherproof steel, building exterior wall is weatherproof steel plate, chemical coating treatment on steel, this treatment can increase the appearance of rust degree, but rust spot will not affect the quality of steel itself. "As the sun, wind and rain, even the influence of humidity in the air, anqing martyrs monument, outer wall will gradually produce a layer of rust stain color uniform thickness, not easy to wipe down a rusty red oxide film, not only will not fall off, also the equivalent of a layer of protective film, prevent the infiltration of corroded medium and transmission, can effectively extend the service life of the weathering steel.[/prisna-wp-translate-show-hide
Post time: Sep-14-2022