In daily life, stainless steel screws are common fasteners. During the use of stainless steel screws, rusting is a common phenomenon and also a troublesome thing for us. This not only affects the aesthetics, but also affects the performance of stainless steel screws. So during use, it is important to pay attention to the following points:
1. The surface of stainless steel screws is coated with organic juices (such as melons and vegetables, noodle soup, phlegm, etc.), which form organic acids in the presence of water and oxygen. Over time, organic acids corrode the metal surface.
2. The attachment of dust or dissimilar metal particles, in humid air, connects with the condensate of stainless steel screws to form a micro battery, triggering an electrochemical reaction and damaging the protective film, which is called electrochemical corrosion.
3. In polluted air (such as atmospheres containing large amounts of sulfides, carbon oxides, and nitrogen oxides), when encountering condensate, sulfuric acid and acetic acid droplets form, causing chemical corrosion.
4. The surface of stainless steel adheres to substances containing acids, alkalis, and salts (such as alkaline water and lime water splashing during wall decoration), causing local corrosion.