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Stainless steel wire has good corrosion resistance and is widely used in the chemical, petroleum, power, nuclear engineering, aerospace, marine, pharmaceutical, light industry, textile and other sectors. Its main purpose is to prevent corrosion and rust. The corrosion resistance of stainless steel mainly relies on the surface passivation film. If the film is incomplete or defective, the stainless steel wire mesh will still be corroded.
Surface oil stains, rust, non-metallic dirt, low-melting metal contaminants, paint, welding slag and spatters, etc., are brought on the surface of stainless steel equipment and components during the forming, assembly, welding, weld inspection and construction marking. It affects the surface quality of metal filter equipment and components, destroys the oxide film on its surface, and even leads to stress corrosion cracking.
The surface cleaning, pickling and passivation of the metal filter screen not only maximize the corrosion resistance, but also prevent product contamination and obtain beautiful appearance. This regulation is for pressure vessels used in petrochemical industries, because these equipment are used in direct contact with corrosive media. From the perspective of ensuring corrosion resistance, pickling passivation is necessary. However, the welds of stainless steel equipment need to be pickled and passivated.
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