When selecting stainless steel wire mesh in a corrosive environment, in addition to a detailed understanding of the specific conditions of use of stainless steel, it is also necessary to consider the corrosion resistance strength, toughness and physical properties when it is stainless, processing, forming properties, resources, The price and the difficulty of getting it.

 

The corrosion resistance of stainless steel includes the properties of corrosion resistance and corrosion resistance of acids, alkalis, salts, etc., as well as oxidation, sulfurization, chlorination, and fluorination at high temperatures. Since different stainless steels wire mesh are mainly used to solve various corrosion problems encountered in actual engineering, the corrosion resistance of stainless steel in a corrosive environment is the first consideration for the material selection personnel. Corrosion is the damage caused by chemical or electrochemical interaction between metal and medium. Corrosion resistance refers to the ability of stainless steel to resist corrosion damage of medium. Therefore, the following points should be noted when corrosion resistance is involved in material selection:

 

1. The standard of corrosion resistance is artificially determined. It must be recognized, used, and not subject to it. The specific criteria for corrosion resistance should be determined according to the specific application requirements.

 

At present, the corrosion resistance of stainless steel is mostly based on the 10-level standard. Which one is selected as the corrosion resistance requirement, the characteristics of the equipment and components (thin thickness, size, service life, product quality (such as impurities, color, purity), etc. Generally speaking, for equipment instruments and components that require smooth mirrors or precise dimensions during use, you can choose Class 1~3 standards; equipments and components that require close cooperation, long-term leakage or long service life 2~5 grades, 4~7 grades are available for equipments and parts that are not required for high maintenance or require very long service life. Unless special exceptions, the annual corrosion rate of stainless steel under the conditions of use is more than 1mm. It should be noted that the Class 10 standard is not applicable for localized corrosion.

 

2. Corrosion resistance is relative and conditional.

 

It is often said that the stainless steel wire mesh's rust and corrosion resistance are relative to rust and non-corrosion. It refers to stainless steel under certain conditions (medium, concentration, temperature, impurities, pressure, flow rate, etc.). Stainless and corrosion resistance. So far, there is no stainless steel with corrosion resistance and corrosion resistance in any corrosive environment. Therefore, the material selection (purchasing) personnel must be selected according to the specific conditions of use. After the stainless steel grade is selected, the use department should also select the selected one. The characteristics of the stainless steel are used correctly, that is, the reasonably selected materials and the correct use can achieve the purpose of corrosion or corrosion resistance.

 

3. Select stainless steel wire mesh to consider its resistance to general corrosion and its resistance to local corrosion.

 

In some aqueous media and chemical media, the latter needs more attention, because the material selection personnel generally pay more attention to the corrosion resistance of stainless steel, and under the conditions of use, they are local corrosion, such as stress corrosion pitting corrosion. The sensitivity is less considered; the local corrosion of stainless steel occurs mostly in a corrosive environment with good resistance to corrosion. Local corrosion often leads to sudden destruction of stainless steel equipment and components, and its hazard is much greater than general corrosion.