Will a500 rectangular tube rust?

There are two methods of forming rectangular tubes, one is direct square, that is, the strip steel is directly curled into a square tube, and the other is round into a square, that is, a circular seamless tube and welded tube are extruded into a rectangular tube.

Does a500 rectangular tube rust?

a500 rectangular tube has the ability to resist atmospheric oxidation, and also has the ability to resist corrosion in media containing acids, alkalis, and salts. But the size of its resistance to corrosion with the chemical composition of its steel itself, add mutual state, working conditions and surrounding medium type and change. Therefore, not any kind of stainless steel can resist corrosion and rust in any environment.

Stainless steel relies on an extremely thin, firm, dense and stable chromium-rich oxide film formed on its surface to prevent oxygen atoms from penetrating into oxidation, thereby obtaining the ability to resist corrosion. If the film is damaged, a500 rectangular tube will lose its ability to resist rust. There are four common ways of destruction in daily life:

1) The surface of a500 rectangular tube adheres to the organic juice, which forms an organic acid in the presence of water and oxygen, and the organic acid will corrode the metal surface for a long time;

2) In polluted air, when it encounters condensed water, it will form sulfuric acid, nitric acid, and acetic acid liquid points, causing chemical corrosion;

3) The surface of the a500 rectangular tube is deposited with dust containing other metal elements or attachments of dissimilar metal particles. In humid air, the condensed water between the attachment and the stainless steel connects the two into a micro-battery, which triggers an electrochemical reaction and damages the protective film, which is called electrochemical corrosion;

4) The surface of a500 rectangular tube contains acids, alkalis, and salts, which cause local corrosion.

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