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Passivated stainless steel filter with dynamic characteristics should not be considered complete stop corrosion

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Passivated stainless steel filter with dynamic characteristics should not be considered complete stop corrosion

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2018-11-06 15:22
  • Views:6

(Summary description)Stainlesssteelfiltermaterialsarestainlesssteelwire301,302,304,304L,316,316L,321refinedfeatures:heat,acid,alkali,corrosionresistance,abrasionresistance,widesolidstructure.Weavingischaracterizedbyrollin

Passivated stainless steel filter with dynamic characteristics should not be considered complete stop corrosion

(Summary description)Stainlesssteelfiltermaterialsarestainlesssteelwire301,302,304,304L,316,316L,321refinedfeatures:heat,acid,alkali,corrosionresistance,abrasionresistance,widesolidstructure.Weavingischaracterizedbyrollin

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2018-11-06 15:22
  • Views:6
Information
  Stainless steel filter materials are stainless steel wire 301, 302, 304, 304L, 316, 316L, 321 refined features: heat, acid , alkali, corrosion resistance , abrasion resistance, wide solid structure . Weaving is characterized by rolling after the first series , two-way curved , two-way wave bending , bending way .
  Mainly for food , mining, chemical, pharmaceutical , petroleum, metallurgy, machinery , protection , construction, handicrafts and other industries.
  There are all kinds of metal mesh material non-ferrous metal filament wire, black wire, white wire, lead wire , stainless steel wire, copper and so on. Size is a mesh -24 mesh, 1 m -5 m wide . Weaving method is rolling after the first series , two-way wave bending , locked bending , flat-topped curved , two-way bending , one-way wave bending . Features ginning mesh : the structure is beautiful , durable , used for mining , coal factory , construction , petrochemical, construction machinery and other places.
Stainless steel filter specifications are not unified form , because the material, wire diameter , different pore sizes and evolved a lot .
  Stainless steel pickling passivation of corrosion-resistant stainless steel mesh principle Pi is mainly due to the surface can be covered with a thin ( about 1nm) dense passivation film , this layer of film 1n corrosive isolation , is the basic stainless steel protective barrier . Passivated stainless steel wire having a dynamic characteristic , should not be considered completely stop etching , diffusion barrier layer is formed instead of the anode reaction rate is greatly reduced. The reducing agent is usually (e.g., chloride ion ) tends to damage the membrane and the case , at the time of the oxidant ( e.g. air ) to maintain or repair the presence of the film . Stainless steel parts are placed in the air to form an oxide film , but this protective film is not perfect . Usually must first be thoroughly cleaned , including caustic and pickling, passivating and then oxidizing agents , in order to ensure the integrity and stability of the passive film . One of the aims is to create favorable conditions for pickling passivation treatment to ensure the quality of the formation of a passivation film . Because the stainless steel surface by pickling average 10μm thick layer of the surface is etched , so that the chemical dissolution rate of the active acid sites of the defects other parts of high surface area , and therefore make the whole surface of the acid tends to be evenly balanced, some of the original likely to cause corrosion hazard is cleared out. But more importantly, pickling passivation of iron and iron oxides than the preferential dissolution of chromium and chromium oxide , chromium depleted layer is removed , resulting in enrichment of chromium stainless steel , the Cr-rich passive film up potential +1.0 V (SCE), a potential close to the noble metal to improve the corrosion stability. Passivation also affect the type of composition and structure of the film , thus affecting the resistance of stainless steel , as modified by electrochemical treatment, the passivation film has a multilayer structure , the barrier layer is formed CrO3 or Cr2O3, or the formation of glassy oxide film, so that the stainless steel to maximize corrosion resistance. Scholars passive film on stainless steel mesh to generate a lot of research . UST Beijing nearly years of 316L steel passivation film photoelectron spectroscopy (xps) Case Study as outlined [ 1 ] .

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