What is Q355NH atmospheric corrosion resistant steel

Q355NH atmospheric corrosion resistant steel is a kind of steel which can bear the harmful corrosion in the atmosphere. Specifically, it is a kind of steel whose components are all in the middle of ordinary steel without chemical process and low alloy steel processed by a series of chemical processes.

The prominent feature of Q355NH atmospheric corrosion resistant steel is that it can resist the corrosion from the atmosphere. The principle is that only phosphorus, nickel, chromium, copper and other trace elements are added into the manufacturing of Q355NH atmospheric corrosion resistant steel, and not many kinds of added elements are added for the sake of comprehensive effect. This also helps the surface of Q355NH atmospheric corrosion resistant steel to form a dense protective film, which can be forced without external force Under the action, it is firmly adhered to the steel. In this way, the substances that may cause corrosion from the air can only stay on the surface of Q355NH atmospheric corrosion resistant steel, and cannot enter the steel, which prevents the internal continuous corrosion, so as to achieve the purpose of protecting the internal matrix of Q355NH atmospheric corrosion resistant steel.

Not only that, because the kinds and quantity of added elements of Q355NH atmospheric corrosion resistant steel are very few, so the production cost is also very low.