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When selecting stainless steel distribution boxes and cabinets in corrosive environments, in addition to having a specific understanding of the specific application conditions of stainless steel, the primary factors that need to be considered are: corrosion resistance, strength, toughness, physical functions, processing and forming functions, resources, price, and difficulty in obtaining stainless steel.

1. Corrosion resistance function

Corrosion resistance includes the ability to resist rust and corrosive media such as acid, alkali, and salt, as well as the ability to resist oxidation, vulcanization, chlorination, and fluorination at high temperatures. Due to the fact that selecting different stainless steels is primarily to address various corrosion issues encountered in practical engineering, the corrosion resistance of stainless steel in corrosive environments needs to be the first consideration for material selection personnel. Corrosion is the damage caused by chemical or electrochemical interactions between metals and media, and corrosion resistance refers to the ability of stainless steel to resist damage caused by media corrosion. Therefore, when selecting materials that involve corrosion resistance, the following points should be noted.

2. Corrosion resistance is relative, conditional, and commonly referred to as the stainless steel's rust resistance. Corrosion resistance refers to stainless steel that has not yet achieved rust resistance and corrosion resistance in any corrosive environment under certain conditions. Therefore, material selection personnel must carefully select specific application conditions. After selecting the stainless steel trademark, the application part also needs to be correctly applied according to the characteristics of the selected stainless steel, that is, reasonable material selection and correct application can achieve the goal of rust resistance or corrosion resistance.

3. When selecting stainless steel, it is necessary to consider both its resistance to general corrosion and its resistance to partial corrosion. In some water and chemical media, the latter needs to be given more attention. This is because material selection personnel generally pay more attention to the general corrosion resistance of stainless steel, while under application conditions, their sensitivity to partial corrosion, such as stress corrosion and pitting corrosion, is less considered; Partial corrosion of stainless steel often occurs in corrosive environments with good resistance to general corrosion. Partial corrosion often leads to sudden damage to stainless steel equipment and components, and its harm is far greater than general corrosion.

4. When applying the corrosion resistance data of stainless steel in various manuals, it should be noted that many of the data are only experimental results within the laboratory, which often have significant discrepancies with the practical medium environment. In order to obtain corrosion resistance data that is closer to the practical application conditions, it is generally necessary to conduct corrosion experiments in the laboratory or simulated device experiments under on-site conditions.

In some application conditions, this situation may also be encountered. When the PLC variable frequency control cabinet is used in the working medium or in the industrial products produced, even if there are trace amounts of certain metal ions in certain stainless steel, it will affect the quality of the chemical process and industrial products. This situation is common in industries such as nuclear fuel pharmaceuticals and pigments, where stainless steel without certain elements is often selected or the corrosion resistance level of the selected stainless steel is appropriately improved to reduce metal ions to the allowable limit.

5. When stainless steel equipment and components fail due to corrosion, an analysis of the cause of corrosion damage should be conducted, and measures should be taken after identifying the cause, rather than throwing them away.

Article source: Jiangmen distribution box http://muaizuowen.com/