Why does 316L stainless steel waterproof sleeve have better corrosion resistance?

The material of stainless steel flexible waterproof sleeve is 304,316L, its material characteristics are relatively stable, the flexibility of steel is also very good, the important thing is that its corrosion resistance is better, in the wet and cold natural environment, or in the area with anti-corrosion rules, with metal stainless steel waterproof sleeve, after a certain solution, has a very good anti-moisture and anti-corrosion effect.

1.Under water

And in the water purification pool of the water plant, stainless steel flexible waterproof sleeve Stainless steel waterproof sleeve is used, that is, because it is not easy to rust, or the rate of rust is relatively slow. In the whole construction process of the specific project, if the wall pipe is not modified with stainless steel waterproof casing, so that the wall and the pipeline immediately touch, first, the force of the wall located on the top of the pipeline is very simple, resulting in the deformation or even rupture of the pipeline, second, the leakage of the pipeline leads to the release of the wall will also cause great damage to the pipeline. It is not difficult to see how critical the efficacy of stainless steel waterproof casing is.

2.In the air

The surface of metal products will react with oxygen in the atmosphere to form an oxide film on the surface. The difference is that the iron oxide formed on the surface of ordinary carbon steel will continue to oxidize, causing the corrosion to continue to expand and eventually form holes. The surface of 316L stainless steel welded pipe will also react with oxygen, but due to its high chromium content, the corrosion resistance of stainless steel depends on chromium. When the content of chromium added reaches 10.5, the atmospheric corrosion resistance of the steel is improved, and the chromium content of 316L stainless steel welded pipe is greater than 17. The reason is that when steel is alloyed with chromium, the type of surface oxide is adapted to resemble the type formed on pure chromium metal. This tightly attached chromium-rich oxide protects the surface from further oxidation. This oxide layer is so thin that the natural luster of the steel surface can be seen through it.