Why does special-shaped steel rust?

Many people think that it is impossible for special-shaped steel to rust. In fact, this is because special-shaped steel lacks a certain understanding, and special-shaped steel will not rust under certain conditions.

Special-shaped steel has the ability to resist atmospheric oxidation and can become rustless. It also has a certain corrosion ability in media containing acid, alkali, and salt. It can become corrosion resistant, but the size of the corrosion resistance is Accompanied by the chemical composition of the steel itself, the state of mutual addition, the conditions used and the type of environmental medium, it has good corrosion resistance in a dry and clean atmosphere, but it is moved to the beach In areas where sea fog contains a lot of salt, it will quickly rust.

There are many forms of damage to the surface film of special-shaped steel. For example, we have the most common forms. The surface of special-shaped steel contains dust of other metal elements or attachments of foreign metal particles. The condensed water between the object and the stainless steel connects the two to form a microbattery, which initiates an electrochemical reaction. The protective film is very prone to damage. We usually call it electrochemical corrosion.