How some of the water spots on the 304 stainless steel kitchen sink formed
304 stainless steel kitchen sink relies on the formation of a layer of extremely thin, firm and dense stable chromium-rich oxide film (protective film) on its surface, which prevents the continuous infiltration and oxidation of oxygen atoms, and obtains the ability of anti-corrosion. Once for some reason, the film is continuously damaged, the oxygen atoms in the air or liquid will continuously infiltrate or the iron atoms in the metal will continuously separate out to form loose iron oxide, and the metal surface will be continuously rusted. There are many forms of damage to this surface film, and the most common ones in daily life are as follows:
1. The surface of the 304 stainless steel kitchen sink has dust containing other metal elements or attachments of different metal particles. In humid air, the condensed water between the attachments and the stainless steel connects the two into a micro battery, causing When the electrochemical reaction occurs, the protective film is destroyed, which is called electrochemical corrosion.
2. The surface of 304 stainless steel kitchen sink adheres to organic juice (such as vegetables, noodle soup, sputum, etc.), and in the presence of water and oxygen, it will form organic acid, which will corrode the metal surface for a long time.
3. The surface of 304 stainless steel kitchen sink adheres to acid, alkali, and salt substances (such as alkaline water and lime water splashed on the wall for decoration), causing local corrosion.
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