Austenitic stainless steel wire has good corrosion resistance, high temperature oxidation resistance, good low temperature performance, excellent mechanical properties and R energy. Therefore, it is widely used in chemical, petroleum, power, nuclear engineering, aerospace, aviation, medicine, light industry, textile and other departments. Its main purpose is corrosion protection and rust prevention. The corrosion resistance of stainless steel mainly depends on the surface passivation film. If the film is incomplete or defective, the stainless steel wire mesh will be corroded. The pickling passivation treatment is usually carried out on the project, which makes the corrosion resistance of stainless steel play a greater role. In stainless steel equipment and parts in forming, assembly, welding, weld inspection (such as inspection and pressure test) and construction of labeling process to bring oil stains, rust, dirt, low melting point metal non metal contamination, paint, welding slag and spatter, these substances affect the surface quality of stainless steel equipment and parts, damage the surface of the oxide film, reduce steel anti corrosion and anti corrosion comprehensive performance (including pitting, crevice corrosion), and even cause should be
Stress corrosion cracking.
Stainless steel wire mesh surface cleaning, pickling and passivation, in addition to maximize corrosion resistance, but also to prevent product pollution and obtain the role of beauty. In the GBl50 1998 steel pressure vessel, the surface of the vessel made of stainless steel and composite steel plates with corrosion protection requirements should be cleaned and passivated". This provision is aimed at using the pressure vessel in the petrochemical industry is concerned, because these devices used in direct contact with the corrosive media occasions, from ensuring corrosion corrosion resistance of the pickling and passivation is necessary. For other industrial sectors, if not for corrosion protection purposes, only the stainless steel based on the clean and aesthetic requirements, without pickling passivation. But the stainless steel welding equipment also needs pickling passivation. In nuclear engineering, some chemical devices and other stringent requirements, in addition to pickling blunt outsider, to adopt high purity medium for final cleaning or fine mechanical, chemical and electrolytic polishing finishing processing.