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Corrosion resistance of stainless steel

  • Author:E-BON
  • Source:E-BON
  • Release on :2017-09-18
A stainless steel has a good corrosion resistance in many mediums, but in some other medium it may corrode because of its low chemical stability. Therefore, a stainless steel can not be corrosion resistant to all media.
According to the mechanism of corrosion of metals, can be divided into physical, chemical corrosion and electrochemical corrosion of three. Most of the metal corrosion in practical life and engineering practice belongs to electrochemical corrosion.

The main corrosion forms of stainless steel are uniform corrosion (surface corrosion), pitting corrosion, crevice corrosion, intergranular corrosion and stress corrosion. E-BON the most excellent stainless steel company, which provide you with Stainless Steel Copper Plated Bar Strainer.

In the atmosphere of iron rust is ionized without the formation of protective iron oxide (rust) corrosion phenomenon, and stainless steel tube stainless steel is also a corrosion phenomenon, the difference is in the atmosphere, ionized iron and chromium in stainless steel, which is a protective chromium oxide the (film), the difference between them is only the essence of different chemical reaction products.
People think that in the atmosphere is serious rust corrosion, stainless steel and stainless steel is stainless steel because of corrosion, and the formation of the red brown rust steel surface visible to the naked eye, and the stainless steel surface to form a thin layer of passivation film is colorless and transparent, invisible to the naked eye is closed, people can only see the passivation film shining and produce metal surface beautiful misunderstanding. E-BON the stainless steel specialist, best price Mixing Bowl manufacturer.

It is conceivable that if the passivation film on the surface of stainless steel pipe is not colorless and opaque, what will happen? Stainless stainless steel tube is determined by the content of chromium in the (Cr content in steel containing enough to ensure the formation of the surface, so the chromium content of chromium rich oxide film is higher, the corrosion resistance of stainless steel and stainless steel tubes are no better, no relationship, no magnetic) no chromium stainless steel tube. A great deal of research and practice at home and abroad have shown that chromium is the only element that can make steel passivation and make steel stainless, corrosion resistant and industrial. 

The so-called chromium free stainless steel pipe does not exist. Stainless steel pipe is the only feature in the atmosphere and fresh water does not rust (that is, stainless steel), and in the atmosphere, fresh water, as well as acid, alkali, salt and other media, although corrosion resistance, but the rust of steel is distinguished.

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