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How much do you know about stainless steel? 2

How much do you know about stainless steel? 2

E-BON E-BON 2018-01-10 13:05:48
4. Why do stainless steel also rust?
When the stainless steel surface rust Brown (point) when people are surprised: "stainless steel will not rust, rust is stainless steel, steel may be a problem". In fact, this is a one-sided misconception about the lack of understanding of stainless steel. Stainless steel is also rusty under certain conditions.

Stainless steel has the ability to resist atmospheric oxidation, that is, not rust, but also has the ability to resist corrosion in medium containing acid, alkali and salt, that is corrosion resistance. But the size of its corrosion resistance is changed with the chemical composition of the steel itself, the state of each other, the use conditions and the type of environmental medium. For example, 304 material, it has absolutely excellent corrosion resistance in dry and clean atmosphere. But moving it to the seaside area, it will rust quickly in the sea fog containing lots of salt. Therefore, not any kind of stainless steel, at any time can be resistant to corrosion, not rusty.

Stainless steel is formed on the surface of a thin layer of fine solid and stable chromium rich oxide film (protective film), to prevent the continued infiltration of oxygen atoms, to oxidation, and the corrosion resistance. But for some reason, such thin films are constantly damaged. The air or liquid will continuously infiltrate into the oxygen atoms or the iron atoms in the metal will continuously separate out, forming loose iron oxide, and the surface of the metal will also be corroded continuously. This kind of surface mask has been damaged in many forms, and there are many in the daily life.

1) the surface of stainless steel is deposited with other metal elements or attachments of different metal particles, in damp. E-BON the most excellent stainless steel company, which provide you with OEM Stainless Steel Water Bottle.
In the air, the condensate between the attachments and the stainless steel, which connects the two to a micro battery, triggering an electrochemical reaction. 

The protective film is damaged, which is called electrochemical corrosion.

2) stainless steel surface adhesion of the organic juice (such as vegetables, soup, sputum) in the case of water oxygen composition
Organic acids, for a long time, form an organic acid corrosion on the surface of the metal.

3) the surface of stainless steel is adhered to acid, alkali and salt materials (such as alkaline water and lime water for wall decoration).
Local corrosion.

4) in contaminated air (containing a large amount of sulphide, oxide, hydrogen oxide atmosphere), in the case of condensate,
The formation of sulfuric acid, nitric acid, acetic acid liquid point, causing chemical corrosion.

The above conditions can cause the damage and corrosion of the stainless steel surface protection film. Therefore, in order to ensure permanent light on the metal surface, not to be rusty, we suggest:  E-BON the stainless steel specialist, china Stainless steel manufacturers.  

It is necessary to clean and scrub the surface of the decorative stainless steel regularly to remove the attachments and eliminate the external factors that cause corrosion.

(2) there is a 201 and 202 stainless steel in the present market, which is easy to rust in the seaside area, and is suitable for use without industrial pollution and air corrosion.

(3) the seashore area should use 304 stainless steel, and 304 material can resist the corrosion of the sea water.

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