Factors to consider when selecting thin-walled stainless steel pipes include corrosion resistance

Some purchasers or engineering companies know little about the selection of raw materials for thin-walled stainless steel pipes, especially when selecting materials in corrosive environments. In addition to understanding the specific use conditions of steel pipes in detail, they should also pay attention to corrosion resistance, strength, toughness and physical properties, processing and forming properties, material prices, and ease of acquisition.

Among them, the corrosion resistance of thin-walled stainless steel pipes mainly includes rust resistance, corrosion resistance to media such as acids, alkalis, and salts, as well as oxidation resistance, sulfidation, chlorination, and fluorination at high temperatures. Since different materials are mainly used to solve various corrosion problems encountered in actual engineering, the first thing to pay attention to when selecting materials is the level of corrosion resistance in a corrosive environment.

Corrosion is damage caused by chemical or electrochemical action between metals and media. Corrosion resistance refers to the ability of metals to resist corrosion damage from media. Therefore, when selecting metal materials that involve the selection of corrosion resistance, we must pay attention to the following points.

At present, the corrosion resistance of stainless steel is mostly based on the 10-level standard. Choosing which level as the corrosion resistance requirement requires the thickness and size of the steel pipe, service life, product quality, etc.

Secondly, corrosion resistance is relative. The rust resistance and corrosion resistance of stainless steel welded steel pipes refer to the relative rust resistance and corrosion resistance under certain conditions. So far, there is no thin-walled stainless steel pipe that will not rust in any corrosive environment, so the material must be selected according to the specific conditions of use. After selecting the grade, the stainless steel pipe manufacturer should use it correctly according to the characteristics of the material adopted. In other words, reasonable materials must be selected and used correctly to achieve the purpose of rust prevention or corrosion resistance.

When selecting the raw materials of thin-walled stainless steel pipes, not only their general corrosion resistance but also their local corrosion resistance should be considered. Because in some water media and chemical media, especially chemical media. This is because when selecting materials, customers usually pay more attention to their general corrosion resistance and less attention to local corrosion, such as sensitivity to stress corrosion and pitting corrosion; local corrosion of stainless steel mostly occurs in corrosive environments with good general corrosion resistance, and local corrosion often leads to sudden damage of products, which is much more harmful than ordinary corrosion.

The above content is what factors should be considered when selecting thin-walled stainless steel pipes? When selecting materials, manufacturers should not only understand the specific use conditions of steel pipes in detail, but also consider the corrosion resistance of the materials. In addition, not only should the general corrosion resistance of thin-walled stainless steel pipes be considered, but also their local corrosion resistance.