The stainless steel rolling door is made of steel that is not easy to rust. The "stainless" here is relative, and it is not certain that it is relative to carbon steel. Stainless steel is not easy to rust, but it is not certain that it does not rust, but in the same conditions and environment, it is less likely to be corroded and rusted than carbon steel. The true nature of "rust" is corrosion or rust. The discoloration or corrosion caused by chemical or electrochemical effects on the surface of steel and atmospheric oxygen, moisture and its acids, alkalis, salts and other substances is called rust. The material produced on the surface is "rust", which is the oxide of iron, which is also called the process of material oxidation.
1. Why the stainless steel rolling door is not easy to rust? This has a direct relationship with chromium, and more than 12.5% chromium is added to the matrix. In the oxidizing corrosive medium, chromium can quickly form a fine passivation film on the surface of the steel to avoid damage to the metal matrix. When the chromium content is above 12.5%, it will form a fine and undisturbed passivation film, the rust prevention function can undergo a leapfrog change, and the rust resistance can be greatly enhanced. This is why the chromium content in stainless steel is important. There are more than 12% factors.
2. There is another way, that is, adding chromium to the stainless steel rolling door, and then adding appropriate alloy elements such as Ni, Mo, V, etc., to have a stronger anti-rust function.
3. Secondly, the corrosion resistance of the stainless steel rolling door is also related to the carbon content, chromium content, and surface treatment conditions. As the carbon content of stainless steel rolling doors increases, the anti-rust performance of the stainless steel rolling door decreases, and the anti-rust performance of 3Cr13 is not as good as that of 2Cr13. As the content of steel increases, the anti-rust function increases. The surface treatment method also affects the anti-rust performance. The chrome-plated surface of the rolling gate, electrolytic polishing, mirror polishing, abrasive belt, and hand-polished anti-rust functions are successively reduced.