Why does stainless steel mesh belt rust

Yangzhou Quanda Metal Mesh Belt Co., Ltd. is a professional manufacturer of stainless steel mesh belts. Why is the stainless steel mesh belt rusty? This question has always plagued users. Today we will answer it professionally. Because there is no non-corrosive metal in general materials, there is no stainless steel mesh belt that does not rust. The so-called stainless steel has excellent corrosion resistance, but it is not easy to corrode.

1cr 13, 2cr 13 is equivalent to 410,420 steel. The 4 series of commonly used steels is not stainless steel in the strict sense, but martensitic ferritic stainless steel, most of which can only be said to be stainless steel. Therefore, the corrosion resistance is very limited and cannot be compared with the stainless steels of the 2 and 3 series.

The 2 series stainless steel wire mesh belts have low nickel content such as 202 and 204 and are cheap, but the overall performance is much worse than the 3 series in terms of corrosion resistance and strength.

The 3 series stainless steel can become stainless steel in a real sense, and its corrosion resistance is far better than other models, especially the stainless steel of 304 and above brands, which has good performance.






However, 3 series stainless steel is also corroded in certain environments. Although it is guaranteed that it will not rust for more than 5 years in a normal environment like 304, it is difficult to last for 168 hours (7 days) in the salt spray test. 304 If passivation treatment is carried out, it can last up to 720 hours (30 days) in the salt spray test, but it is difficult to continue. Therefore, all stainless steel mesh belt products are relative, and which stainless steel material must be selected according to the actual environment and situation. After all, the price of high-quality stainless steel is much higher than other varieties, and it must be calculated in multiples.

1Cr18Ni9Ti is equivalent to 321 (slightly different). It is one of the higher brands in the 3 series. It is austenitic stainless steel and high temperature resistant steel. Its physical properties are excellent, both in strength and corrosion resistance. In ordinary environments, it is really not easy to rust 1Cr18Ni9Ti. SUS304 should support 0Cr18Ni9. On the other hand, 1Cr18Ni9Ti is equivalent to the specification between 316 and 321, which is close to 321, and the carbon content of the two is different. Strictly speaking, 1Cr18Ni9Ti does not meet the standard specifications of the 3 series, so it is clearly recorded that there is a slight difference. In addition, please note that nickel content is one of the important indicators for determining stainless steel. As mentioned above, nickel itself is not corrosion resistant. Nickel not only forms austenite more stably during stainless steel smelting, but also contributes to the acceleration of high temperature and solidification rate. The real reason why the 3 series stainless steel is stainless steel is the stable crystal structure of austenite, not nickel. For steel, only a stable and appropriate amount of alloy composition can maximize the performance of the material, so the reason for so many brands is not that the higher the nickel content, the better.

In summary, it can be concluded that the stainless steel mesh belt is also rusty under certain circumstances.