Orsaker till att rostfria skruvar rostar
1. Fastsättningen av damm eller olika metallpartiklar, i fuktig luft, fästet och det kondenserade vattnet från den rostfria skruven förbinder de två till ett mikro-batteri, som utlöser en elektrokemisk reaktion och förstör skyddsfilmen, som kallas el. kemisk korrosion.
2. Organic juices (such as vegetables, noodle soup, sputum, etc.) adhere to the surface of stainless steel screws. In the presence of water and oxygen, organic acids are formed, and organic acids will corrode the metal surface for a long time.
3. The surface of stainless steel adheres to substances containing acids, alkalis and salts (such as lye water and lime water splashing from decoration walls), causing local corrosion.
4. In polluted air (such as atmosphere containing a large amount of sulfide, carbon oxide, nitrogen oxide), when encountering condensed water, it will form liquid spots of sulfuric acid, nitric acid and acetic acid, causing chemical corrosion.
The above conditions can cause damage to the protective film on the surface of the stainless steel screw and cause rust. Therefore, in order to ensure that the surface of the stainless steel screw is permanently bright and not rusted. We have to do cleaning, passivation and other treatments on its surface.
