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Stainless steel angle surface rust corrosion should do

Time:2022-03-28 Source:Wuxi Jianuo Special Steel Co., Ltd.

Stainless steel angle surface rust corrosion should do

Stainless steel angle has the ability to resist the work of air air oxidation one that is stainless steel, in addition also has the ability to resist corrosion in the material containing acid, alkali, salt that is corrosion resistance. But the size of its corrosion resistance work ability is with its steel system own organic chemical composition, mutual situation, application standards and natural environment material type and change. Such as 304 raw materials, in the dry and clean air, there is a certain quality of corrosion resistance work ability, but it will be moved to the Haibin region, in the sea spray with a lot of salt, quickly will rust and corrosion. Therefore, not all a stainless steel angle, in any moment can resist corrosion, not rust.

Stainless steel angle is relying on its surface layer produced by a layer of extra-thin but firm and delicate smooth chromium-rich air oxide film (protective film), to avoid oxygen molecules again penetrate to, again air oxidation, and get corrosion-resistant work ability. Once the plastic film is continuously damaged for various reasons, oxygen molecules in the gas or liquid will continue to penetrate or iron atoms in the metal material will continue to precipitate out and produce loose compounds, and the metal surface will suffer from continuous rusting. This type of surface film is damaged in many ways, life is common in the following categories.

1. Stainless steel angle surface deposits with other chemical elements of soot or foreign metal material particles appendages, in the wet and cold air, appendages and stainless steel angle condensation between the two connected into a micro-charge battery, caused by electrochemical corrosion, protective film damage, known as the principle of primary battery.

2. Stainless steel angle surface adhered to the organic compounds liquid juice (such as squash, soup noodles phlegm, etc.), in the presence of ice oxygen condition, the composition of citric acid, long-term is produced citric acid on the surface of the metal leaching.

3. Stainless steel angle surface adhesion with acid, alkali, acidic chemicals (such as indoor decoration wall edible alkali, lime slurry spray test) caused by partial corrosion.

4. In the air with environmental pollution (with a lot of sulfate, metal oxides, hydrogen oxide air), condensate, hydrochloric acid, sodium cyanide, glacial acetic acid liquid point, resulting in chemical corrosion.