First of all, because the weathering steel plate has strong corrosion resistance, in the natural environment, the color from the new steel plate to the surface of the intermediate material which has a stable and dense rust red protective layer is generally from blue black to light yellow to orange red. To rust red, the last red and brown, uneven, uneven process. At least a period of one to two years is required in South China, and it may take longer for five to six years for some dry areas. In South China, even if it is to produce a simple light rust yellow, it takes about 2-3 months and it is easy to be rubbed off the rust layer. For most real estate or park buildings, the landscape construction period is tight, and it usually takes three months to complete. This is undoubtedly one of the most difficult problems to overcome!
Weathering Steel Plate Principle
Corten A weathering steel plate is added with trace elements such as phosphorus, copper, chromium and nickel to form a dense and highly protective film on the surface of the steel, which hinders the diffusion and development of rust, and protects the substrate under the rust layer to slow down Corrosion rate. The amorphous spinel-type oxide layer formed between the rust layer and the substrate is dense and has good adhesion to the base metal. Due to the presence of the dense oxide film, oxygen in the atmosphere is prevented. The infiltration of water into the steel matrix slows the development of rust to the steel material and greatly improves the atmospheric corrosion resistance of the steel material. Weathering steel is a steel system that can be used for thinning, bare use or simplified painting, so that the product can resist corrosion, save labor, and upgrade. It is also a new mechanism, new technology and new technology that can be integrated into modern metallurgy. Sustainable development and innovation in the steel system.
Weathering Steel Plate Rust Principle And Method
At the initial stage of corrosion, the rust layer formed on the surface is denser than carbon steel, and the cracks and holes are relatively small. After 25 days, the carbon steel and the weathering steel are partially delaminated, and the corrosion products are not different. The difference is mainly the alloy in the rust layer. The role of the element. The weathering steel rust layer has precipitation of Cu and Cr alloy elements, and gathers at the crack to resist the intrusion of moisture and harmful ions in the atmosphere to prevent further corrosion of the base metal. Thereby achieving the effect of resistance to atmospheric corrosion. The natural state of the weather-resistant steel sheet is in the atmosphere because the protective film on the surface layer is difficult to be corroded. Therefore, the surface oxide protective layer should be treated uniformly before rusting, and then a certain rusting formula is sprayed to promote its rapid rust.
Weathering steel, which is resistant to atmospheric corrosion steel, is a series of low-alloy steels between ordinary steel and stainless steel. Weathering steel is made of ordinary carbon steel and a small amount of corrosion-resistant elements such as copper and nickel. Q355NH weathering steel has the toughness and plasticity of high-quality steel. Extension, molding, welding, abrasion, high temperature, anti-fatigue and other characteristics.
