Focusing on filtration screens
filters, strainers, baskets, cones, cartridges

  • Wedge Wire Screen
  • Filter Baskets
  • Woven Screen Cloth
  • Photo Chemical Etching Screen
Home / News / Company News

Why does Stainless Steel Filter Screen Not Rust? (Part 1)

Mar. 31, 2020

Generally speaking, cone shaped stainless steel mesh sieve is a filter that is not easy to rust. In fact, part of the stainless steel wire mesh strainer basket has stainless steel. It also has acid resistance (corrosion resistance). The rust and corrosion resistance of stainless steel is due to the formation of a chromium-rich oxide film (passivation film) on its surface. This stainless and corrosion resistance are relative.

Tests have shown that the corrosion resistance of steel in weak media such as atmosphere and water and oxidizing media such as nitric acid increases with the increase of chromium water content in steel. When the chromium content reaches a certain percentage, the corrosion resistance of steel occurs Sudden change, from easy to rust to not easy to rust, from not resistant to corrosion.

Cone Shaped Stainless Steel Mesh Sieve

Cone Shaped Stainless Steel Mesh Sieve

There are many ways to classify stainless steel. According to the organization structure at room temperature, there are martensitic, austenitic, ferritic, and duplex stainless steels. According to the main chemical composition, they can be basically divided into two major systems: chromium stainless steel and chromium nickel stainless steel. There are nitric acid-resistant stainless steel, sulfuric acid-resistant stainless steel, seawater-resistant stainless steel, etc., which can be divided into pitting-resistant stainless steel, stress-resistant stainless steel, and intergranular stainless steel according to the type of corrosion resistance; Classification according to functional characteristics can be divided into non-magnetic stainless steel, free-cutting stainless steel, low temperature stainless steel, high strength stainless steel and so on. Because stainless steel has a series of characteristics such as excellent corrosion resistance, formability, compatibility, and toughness over a wide temperature range, it has been widely used in heavy industry, light industry, daily necessities, and building decoration industries .

Austenitic stainless steel filter: stainless steel with austenitic structure at normal temperature. When steel contains about 18% Cr, Ni 8% ~ 10%, and C about 0.1%, it has a stable austenite structure. Austenitic chromium-nickel stainless steels include the well-known 18Cr-8Ni steels and high Cr-Ni series steels developed by increasing the Cr and Ni content and adding elements such as Mo, Cu, Si, Nb, and Ti.

Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low. It cannot be strengthened by phase transformation. It can only be strengthened by cold working. If S, Ca, Se, Te and other elements are added, it has good machinability. In addition to the corrosion resistance of oxidizing acid media, this type of steel can also be resistant to the corrosion of sulfuric acid, phosphoric acid, formic acid, acetic acid, urea, etc. if it contains elements such as Mo and Cu. If the carbon content in this kind of steel is less than 0.03% or contains Ti and Ni, it can significantly improve its resistance to intergranular corrosion. If the carbon content in this kind of steel is less than 0.03% or contains Ti and Ni, it can significantly improve its resistance to intergranular corrosion. High silicon austenitic stainless steel with concentrated nitric acid has good corrosion resistance. Because austenitic stainless steel has comprehensive and good comprehensive properties, it has been widely used in various industries.

Contact Us
  • Tel. : +86 0318 8871 963
  • E-mail :
  • Mobile : +86 189 3163 5571
  • Add. : No.6 Jingyi Road, Anping Couty, Hengshui City, Hebei Province, China, 053600.
Follow Us