1. Organic juice (such as melon, vegetable, noodle soup, sputum, etc.) adheres to the surface of stainless steel screws. Under the condition of water and oxygen, organic acid is formed, and the organic acid will corrode the metal surface for a long time.
2. The attachment of dust or foreign metal particles, in the humid air, the attachment and the condensed water of the stainless steel screw, connect the two to form a micro battery, which triggers an electrochemical reaction and damages the protective film, which is called electricity Chemical corrosion.
3. In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, and nitrogen oxide), it will form sulfuric acid and acetic acid liquid spots in contact with condensed water, causing chemical corrosion.
4. The surface of stainless steel adheres to acid, alkali, and salt substances (such as alkali water and lime water splashing on the decoration wall), causing local corrosion.
