Corrosion of stainless steel
The surface of the metal exposed in the corrosive environment will undergo electrochemical reaction or chemical reaction, resulting in uniform corrosion.In the passivating film on the surface of stainless steel, where the corrosion resistance is weak, the pitting reaction is formed due to the self-excited reaction, and the small holes are formed.There are also intercrystalline corrosion cracking inside the stainless steel, all of these, on the surface of the stainless steel passivation film.Accordingly, to stainless steel surface must undertake regular cleanness maintains, in order to maintain its gorgeous surface and prolong service life.When cleaning the stainless steel surface, you must pay attention to avoid surface scratches, avoid using the washing liquid of bleaching ingredients and abrasive agent, steel ball, grinding tool, etc. In order to remove the washing liquid, wash the surface with clean water after finishing.
Stainless steel is a very thin, strong and fine stable chrome-rich oxide film (protective film) formed on its surface.The ability to resist rust is obtained by preventing oxygen atoms from infiltrating and oxidizing.If, for some reason, the film is constantly damaged, oxygen atoms in the air or liquid are constantly separated, forming loose iron oxide, and the metal surface is constantly corroded.
Many domestic manufacturers, due to cost considerations, in stainless steel to reduce chromium, nickel, increased manganese content.Experts believe that stainless steel is able to resist rust because of the presence of chromium and nickel, reducing the content of these two components will reduce the anti-rust performance.