An electrochemical reaction or chemical reaction occurs on the surface of a metal exposed to a corrosive environment, which is evenly corroded. Stainless steel Surface passivation film in the weak corrosion resistance of the site, due to self-excitation reaction to form a pitting reaction, the formation of small holes, coupled with the proximity of chloride ions, the formation of a strong corrosive solution, accelerate the speed of corrosion reaction. There is also the internal intergranular corrosion cracking of stainless steel, all of which have a damaging effect on the passivation film on the stainless steel surface. Therefore, the stainless steel surface must be regularly cleaned and maintained to maintain its gorgeous surface and extend its service life.
Cleaning stainless steel surface must pay attention to do not occur surface scratches, avoid the use of bleaching ingredients and abrasive detergent, wire ball, grinding tools, etc., in order to remove the detergent, washing completed and then rinse the surface with clean water. Stainless steel is a very thin and sturdy and stable chromium oxide film (protective film) formed by its surface. Prevent oxygen atoms from continuing to seep in and continue to oxidize, and gain corrosion resistance.
Once there is a reason for this film to be constantly destroyed, the oxygen atoms in the air or liquid will continue to be analyzed out, forming a loose iron oxide, the metal surface will be constantly corroded. Many domestic manufacturers for cost reasons, in stainless steel reduced chromium, nickel, increased the content of manganese. Experts believe that stainless steel can not rust, because of the presence of chromium and nickel, reducing the content of these two components will reduce anti-rust performance.