The reason why ASTM A270 seamless Stainless Steel Pipe is not easy to rust is that there is a thin but strong oxide film on its surface to prevent the oxidation of iron by oxygen atoms, so if this oxide film is damaged, ASTM A270 seamless Stainless Steel Pipe will will rust quickly.
There are many reasons for ASTM A270 seamless Stainless Steel Pipe to rust, generally the main ones are as follows:
1. On the surface of ASTM A270 seamless Stainless Steel Pipe, there are deposits of dust or heterogeneous metal particles containing other metal elements. In humid air, the condensed water between the deposits and the stainless steel connects the two into a micro-battery. An electrochemical reaction is triggered, and the protective film is damaged, which is called electrochemical corrosion.
2. The surface of ASTM A270 seamless Stainless Steel Pipe adheres to organic juices (such as vegetables, noodle soup, saliva, etc.), which constitute organic acids in the presence of water and oxygen, 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 alkali water and lime water splashing from the decoration walls), causing local corrosion.
4. In the polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, nitrogen oxide), when encountering condensed water, it will form the liquid point of sulfuric acid, nitric acid and acetic acid, causing chemical corrosion.
5. The chemical composition of some stainless steels on the market cannot meet the corresponding national standards and cannot meet the requirements, so it will also cause rust.
Therefore, if you want to avoid rusting of ASTM A270 seamless Stainless Steel Pipe, you must clean and scrub the surface of ASTM A270 seamless Stainless Steel Pipe frequently to remove attachments and eliminate external factors that cause rust. At the same time, when purchasing, try to choose a regular manufacturer.