The main technical support point of weathering steel plate used as exterior wall material is that weathering steel is superior to ordinary steel in terms of corrosion resistance. In natural weather, weathering steel is formed by adding weathering elements such as chromium, bismuth, molybdenum, phosphorus, titanium, etc., so that the steel material forms a layer about 50-100 microns thick and adheres between the base metals. Rust layer and good oxide layer of substrate.
Due to the existence of this dense oxide film, the oxygen and water in the atmosphere are prevented from penetrating into the steel matrix, which slows down the rust of the steel, thereby greatly improving the resistance of the steel to atmospheric corrosion. Studies have shown that, according to the composition of weathering steel, steel components are used in different environments, and the weather resistance of weathering steel can be 5-8 times higher than that of ordinary steel.
Chinese weathering steel grades
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TB/T 1979 |
08CuPVRE |
09CuPTiRE-A |
09CuPTiRE-B |
09CuPCrNi-A |
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09CuPCrNi-B |
05CuPCrNi |
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GB/T 4171 |
Q295GNH |
Q355GNH |
Q265GNH |
Q235NH |
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Q310GNH |
Q295NH |
Q355NH |
Q415NH |
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Q460NH |
Q500NH |
Q550NH |
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This special dense oxide layer formed on the surface of weathering steel has a random, average natural rust red color, making it an attractive building exterior wall material and a revolutionary material for a new generation of curtain wall decoration. Good value, stainless steel.
Why the weathering steel plate needs oxidation?
First of all, it quickly forms a stable, uniform color, rust red oxide film, not simply erasing. In an environment with an outdoor temperature of 25 degrees Celsius, the corrosion treatment process is usually completed within 3 hours.
Second, under the rust treatment catalytic program, the agile and rough appearance is rough, which makes the structure volume and quality higher, improves the visual effect and sensory effect, flexibly improves the garden planning effect, and improves the economic and artistic benefits! This is a feeling that planners are obsessed with . Generally speaking, weathering steel will rust naturally for 1-2 years. It has only 1-2 months of fine yellow rust, no feeling, simple rust!
Third, regardless of the local geographic location, local climate, location (facing southeast or northwest), the composition of the rust red oxide film is uniform and stable!
Fourth, the treatment process will not corrode, will not affect the continuous composition of the outer surface rust layer, environmental protection, non-toxic and harmless, and will not affect the growth of plants. It will not affect the "symbiosis" between limited data and surrounding plants, and the performance of the planning concept can continue.
