When brown rust spots appear on the surface of stainless steel checkered plate, people feel surprised: that "stainless steel checkered plate will not rust, rust is not stainless steel checkered plate, may be the quality of the problem". In fact, this is a lack of understanding of stainless steel decorative pattern board of a one-sided wrong view. Stainless steel pattern plate will rust under certain conditions.
Stainless steel pattern plate has the ability to resist oxidation, but also has the ability to resist corrosion in the medium containing acid, alkali and salt. But its corrosion resistance is with its chemical composition of the steel itself, the use of conditions and the type of environmental media and change. In a dry, clean atmosphere, it has absolutely excellent corrosion resistance, but moved to the seaside area, in the sea fog containing a lot of salt, will soon rust. Therefore, not all stainless steel pattern plate, at any time can be corroded, not rust.
Stainless steel pattern plate is formed on the surface of a layer of extremely thin and strong fine stable chrome-rich oxide film, to prevent oxygen atoms continue to infiltrate, oxidation, and obtain corrosion resistance. If this film is destroyed, air or liquid and oxygen atoms will continue to infiltrate or iron atoms will continue to resolve out of the metal, forming iron oxide, and the metal surface will be constantly corroded. This protective film is damaged in many forms, common are the following:
1. Stainless steel decorative pattern plate surface dust deposit savings contain other metal elements or heterogeneous metal makings of attachments, in the humid air, attachments and stainless steel decorative pattern of condensation water, will both together as a micro battery, triggers the electrochemical reaction, protective film is damaged, usually called the corrosion electrochemical corrosion.
2. The surface of the stainless steel pattern plate is adhered to the organic juice, in the case of water and oxygen, forming organic acids, and forming organic acids for a long time to corrosion of the metal surface.
3 stainless steel pattern plate surface adhesion contains acid, alkali, salt substances caused by local corrosion.
4. In polluted air, condensate water will form sulfuric acid, nitric acid and acetic acid liquid points, causing chemical corrosion.
Post time: Aug-16-2022