Thin walled stainless steel pipes rely on a very thin but extremely strong, dense, and reliable chromium rich oxide film on the surface to prevent oxygen atoms from penetrating into the interior of the steel pipe, thereby achieving oxidation resistance. However, in some cases, this oxide film will continue to be destroyed, oxygen atoms in air or liquid will continuously penetrate, and iron atoms in the metal will also continuously precipitate, forming loose iron oxide, leading to continuous oxidation of the metal surface. When the surface of steel pipes oxidizes, oxide enrichment occurs, and once it reaches a certain scale, the rate of further oxidation will significantly slow down. So, what are the reasons for the oxidation of thin-walled stainless steel pipes?
1. Production process of thin-walled stainless steel pipes
This is one of the reasons for the oxidation of stainless steel products. From the perspective of production process and product characteristics, forming a thin oxide film on the surface of the product is the basic process to avoid oxidation, and it is also one of the main features that distinguishes stainless steel from other steels. However, when the production process is incomplete or neglected, resulting in incomplete or discontinuous oxide film, oxygen in the air will directly undergo redox reactions with certain elements in the pipe, leading to product oxidation.
2. Composition ratio of thin-walled stainless steel pipes
In order to reduce production costs, some manufacturers will lower the proportion of important elements such as chromium and nickel, and increase the content of other elements such as carbon. This production phenomenon of not strictly following the composition ratio of thin-walled stainless steel pipe models and product characteristics will not only greatly reduce product quality, but also affect the appearance and antioxidant performance of the product. For example, when the chromium content of 304 stainless steel pipes is insufficient, it not only affects the corrosion resistance and formability of the product, but also poses quality risks when used in industrial production.
3. Human factors affecting thin-walled stainless steel pipes
This is also one of the common reasons for product oxidation encountered by some consumers when using thin-walled stainless steel pipes. Some consumers mishandle the use and maintenance of products, especially stainless steel pipe products used in the food and chemical equipment industries, which have a high probability of human oxidation. For the phenomenon of artificial oxidation, it is necessary to master the correct knowledge of product use and regularly carry out effective maintenance and upkeep.
The above is about the reasons for oxidation of thin-walled stainless steel pipes. The reasons for steel pipe oxidation include production processes; Reduce antioxidant elements such as chromium and nickel, and increase carbon content; Improper use and maintenance. Therefore, manufacturers must pay attention to the ingredient ratio when producing thin-walled stainless steel pipes; Secondly, choose appropriate production processes to prevent oxidation; In addition, there are some issues related to usage and maintenance that require proper use of the product and regular maintenance of the pipeline.
