Many people have a misunderstanding about stainless steel and believe that stainless steel will never rust. In actual fact, stainless steel is made of iron-chromium alloy and then incorporated with other trace elements, and its corrosion resistance is good. The reason is that the surface is formed with a passivation film. In nature, it exists in the form of a more stable oxide. That is, although the degree of oxidation of stainless steel is different depending on the conditions of use, it is eventually oxidized. This phenomenon is usually called eclipse.
Many stainless steel mirrors in old passenger elevators will be oxidized due to prolonged use, making it difficult to see. Electrochemical reaction or chemical reaction occurs on the metal surface exposed to the corrosive environment and is uniformly corroded. The weak corrosion resistance of the stainless steel elevator surface passivation film forms a pitting reaction due to a self-excited reaction, resulting in the formation of small holes, together with the close proximity of chloride ions, forming a strong corrosive solution and accelerating the speed of the corrosion reaction. .
There is also intergranular corrosion cracking inside the stainless steel, all of which damages the passivation film on the stainless steel surface. Therefore, in order to maintain the gorgeous surface of the stainless steel products and to extend their service life, regular maintenance is required.
In reality, once it is found that the stainless steel surface of the elevator has rusted, it must take measures to deal with it. Otherwise, serious accidents may occur, and even casualties may occur. Therefore, we must learn more about the maintenance of stainless steel surfaces on elevators. As for how to maintain it, we will not introduce it here. If you want to understand it, you can directly contact us.
Contact: Tony Yu