The stainless and corrosion resistance of stainless steel is due to the formation of a chromium-rich oxide film (passive film) on its surface. This rust and corrosion resistance are relative. In layman's terms, stainless steel is steel that is not easy to rust, not steel that does not rust. Stainless steel relies on the chromium-rich oxide film (protective film) on its surface to prevent rust. In daily use, this film is prone to continuous damage, and the metal surface is also subject to continuous corrosion. There are many forms of damage to this surface film, and the most common ones in daily life are as follows:
1. Liquids such as vegetables, noodle soup, and phlegm adhere to the surface of stainless steel. In the presence of moisture, it is easy to form organic acids to corrode the metal surface.
3. In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, and nitrogen oxide), when it encounters condensed water, it will form liquid points of sulfuric acid, nitric acid, and acetic acid, causing chemical corrosion.
Based on the above, we can see that although the product name of stainless steel is "stainless steel". However, the humid environment and the damage during daily use may cause stainless steel products to rust. The bathroom faucet itself is a place with high frequency of use and easy contact with acidic and alkaline hand sanitizers and laundry detergents. So maintenance needs more attention!
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