Intergranular corrosion tendency of 304 stainless steel tubes

The reason why 304stainless steel tubes rust is that the stainless steel surface has a chromium rich oxide film (protective film) to prevent oxygen atom penetration and oxidation, thereby obtaining corrosion resistance. Once for some reason, this thin film is constantly destroyed, oxygen atoms in air or liquid will continue to penetrate or iron atoms in metal will continue to separate, forming loose iron oxide, and the metal surface will also continue to rust. Alloys without solid solution treatment will not dissolve into the matrix, resulting in a low content of the matrix alloy.
This material, which does not contain titanium and tantalum, has an inherent tendency for intergranular corrosion by adding titanium and niobium and stabilizing treatment to reduce intergranular corrosion.
High alloy steel can resist corrosion in air or chemical corrosive media. The stainless steel surface is beautiful and 304 stainless steel tubes has good corrosion resistance. It does not require surface treatment such as electroplating, and it leverages the inherent surface characteristics of stainless steel. A type of steel, commonly referred to as stainless steel. Representative high alloy steels such as 13 chromium steel and 18-8 chromium nickel steel.
304 stainless steel pipe is a type of hollow long round steel, mainly used for industrial transportation pipelines and mechanical structural components such as petroleum, chemical, pharmaceutical, food, light industry, mechanical instruments, etc. In addition, mm2; S1- The sample has a reduced cross-section to the smallest diameter. When bending, the 304 stainless steel tube, Huaping 304 stainless steel tube, has the same torsional strength and lighter weight, making it widely used in the manufacturing of mechanical parts and engineering structures. It is also commonly used as furniture and other kitchen utensils. The implementation of standard Longling spiral steel pipes is based on the original cross-sectional area of the original strip steel and N (Newton) samples, and usually adopts automatic double wire double hot extrusion and welding side submerged arc welding processes. Spiral seam steel pipe. The Zengcheng spiral steel pipe will be sent to the welding pipe unit. After being rolled by multiple rollers, the 304 stainless steel pipe steel strip will gradually roll up. The Huaping County 304 stainless steel pipe will form an open steel billet with an annular gap, and the pressure reducing roller will be adjusted to control the weld gap at 1-3mm. The Huaping County 304 stainless steel pipe will be flush with the welding end. The classification of 304 stainless steel pipe process is the production process of stainless steel seamless pipe. The good reasons for round steel preparation, heating, hot rolling perforation, cutting head, acid washing, grinding, lubrication, cold rolling processing, degreasing, solid heat treatment, and straightening are as follows:

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