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What cause stainless steel get rust?

Apr 12, 2018

           Some customers complain abouy the 304 stainless steel products get rust after using.

What cause the stainless steel products get rust? there are many reason will cause stainless steel get rust finally.


1. The stainless steel surface contains deposits of dust or other dissimilar metal particles containing other metal elements. 
   In humid air, the condensate between the attachment material and the stainless steel is connected into a micro battery
    to initiate the electrochemical reaction. The protective film is damaged, which is called electrochemical corrosion.
 2. The surface of the stainless steel adheres to the organic matter sap. In the presence of water and oxygen, organic acids
     are formed, and organic acids attack the metal surface for a long time.
 3. The surface of stainless steel adheres with acids, alkalis and salts, causing localized corrosion.
 4. In contaminated air, condensation occurs and sulfuric acid, nitric acid, and acetic acid liquids form, causing chemical corrosion.