What are the conditions of stainless steel corrosion?

1. There are dust containing other metal elements or adherent of dissimilar metal particles on the surface of stainless steel. In the humid air, the condensate between the adherent and stainless steel forms a micro battery, which leads to electrochemical reaction and damages the protective film, which is called electrochemical corrosion.

2. Organic matter juice (such as melon and vegetable, noodle soup, phlegm, etc.) adhered to the surface of stainless steel forms organic acid under the condition of water and oxygen, which corrodes the metal surface for a long time.

3. There are acid, alkali and salt substances on the surface of stainless steel (such as alkali water and lime water splashing on the decoration wall), causing local corrosion.

4. In the polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide and nitrogen oxide), when encountering condensed water, sulfuric acid, nitric acid and acetic acid liquid point will be formed, which will cause chemical corrosion. The above conditions can cause the damage of stainless steel surface protective film and lead to corrosion.