Surface cleaning and passivation of stainless steel wire mesh

Stainless steel wire mesh surface cleaning, pickling and passivation, in addition to maximize the corrosion resistance of stainless steel wire mesh, but also to prevent product contamination and access to the role of aesthetics. In GBl50 1998 a "steel pressure vessel" provides that "the surface of a vessel made of stainless steel and composite steel plate with corrosion resistance shall be passivated by pickling".

Necessity of pickling passivation for stainless steel wire mesh

Austenitic stainless steel wire has good corrosion resistance, high temperature oxidation resistance, good low temperature performance and excellent mechanical and coupled with R. It is widely used in chemical, petroleum, power, nuclear engineering, aerospace, marine, pharmaceutical, light industry, textile and other sectors. Its main purpose is to prevent rust. Corrosion resistance of stainless steel mainly depends on the surface passivation film, if the film is incomplete or defective, stainless steel wire mesh will still be corrosion. Pickling passivation treatment is usually performed 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

Force corrosion cracking.

Stainless steel wire mesh surface cleaning, pickling and passivation, in addition to maximize corrosion resistance, but also to prevent product contamination and access to the role of aesthetics. In GBl50 1998 "steel pressure vessel", the surface of the container made of stainless steel and composite steel plate with corrosion resistance shall be treated by acid pickling and passivation". 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 the purpose of corrosion protection, only on the basis of cleanliness and aesthetic requirements, and the use of stainless steel material is not required to acid passivation. However, the welding of stainless steel equipment needs to be passivated. 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.