Currently, screws are inseparable from our daily lives, and they have become very common fasteners in our daily lives.

With the continuous development of society, there are more and more types of screws, and their application fields can be said to require them everywhere. Although there are many types of screws nowadays, the materials used for each screw are still different. Stainless steel screws are generally considered non rusting by the name, but many people who have actually used stainless steel screws have questions about why stainless steel screws still rust? In fact, this situation is not surprising because the main rust resistance of stainless steel screws is only oxidation resistance, and they will still rust under the following two common factors:

1. Stainless steel screws, in the presence of dust and dissimilar metals, and when exposed to relatively humid environments, form condensed water. In contact with the two, a micro battery is released, triggering an electrochemical reaction that damages the protective film of the stainless steel screw, leading to electrochemical corrosion;

2. Adhesion of substances containing acids, alkalis, and salts on the surface of stainless steel screws can also lead to rusting. When encountering this common phenomenon, we only need to do a simple wiping treatment.