Q345NH steel is a weathering steel grade. The main technical support point is that rust steel plate has superior corrosion resistance compared with ordinary weathering steel. In the natural climate, the weathering board adds chromium, niobium, molybdenum, nickel, titanium, rare earth and other weather-resistant alloy elements to form a layer of steel material between the rust layer and the substrate that is about 50-100 microns thick and dense with the substrate oxide layer with good metal adhesion.
Due to the existence of this dense oxide film, it prevents the penetration of oxygen and water in the atmosphere into the steel matrix, slowing down the development of rust to the depth of the steel material, thereby greatly improving the atmospheric corrosion resistance and decorative effect of the Q345NH steel plate material. The research indicates that the weather resistance of the rusted steel plate can be increased by 5-8 times compared with ordinary weather-resistant steel due to the different weathering board composition and the use environment of the steel components. Due to the special dense oxide layer that can be formed on the surface of the Q345NH weathering steel plate, it has a stable and uniform natural rust red, which makes it an attractive building exterior wall material and a revolutionary material for the new generation of curtain wall decoration. Its cost-effective and stainless steel.
Weathering plate is also called rust steel plate. Real rust steel plate: uniform rust red, good color fastness and solidity, no peeling, no slag, no rust water flowing in the later period, super corrosion resistance, fake rust steel plate: black color, that is, ordinary weathering steel or Ordinary steel, poor mechanical properties of steel, severe rust in the early stage, peeling, slag, rusty hot metal flooding the environment, super short service life, and serious corrosion.
