From the above figure, we found that the sliding support and the handle are rusted to varying degrees. It is necessary to know that the sliding support and the handle are usually made of 304 stainless steel. So the first reaction of many people is, how can stainless steel rust? Is this sliding support and handle not quality? Or is the material not stainless steel at all?
In fact, this is a misconception about the face of stainless steel. Stainless steel will also rust under certain conditions. Stainless steel is not completely rust-free, but it has the ability to resist atmospheric oxidation (rustiness) and certain acid and alkali resistance (corrosion resistance). However, the degree of rust and corrosion resistance depends on the chemical composition of the steel itself and the conditions of use and environment. Such as 304, 316 stainless steel commonly used in door and window hardware. The 304 stainless steel has a very good anti-corrosion ability in the dry and clean atmosphere, but it is moved to the coastal area, and it will soon rust in the sea fog containing a lot of salt; while the 316 steel pipe performs well. Therefore, it is not any kind of stainless steel, it can resist corrosion and rust in any environment.
So what are the specific reasons and treatment methods for stainless steel rust?
Reason for rust:
1. The surface of stainless steel contains dust or other metal particles attached to other metal elements. In humid air, the condensed water between the attached material and the stainless steel connects the two into a micro battery, triggering an electrochemical reaction. The protective film is damaged, which is called electrochemical corrosion.
2, the surface of the stainless steel adheres to the organic juice (such as melon, noodle soup, wolfberry, etc.), in the case of water and oxygen, constitutes an organic acid, and the organic acid corrodes the metal surface for a long time.
3. The surface of the stainless steel adheres to acid, alkali and salt substances (such as alkali water and lime water splashing on the wall), causing local corrosion.
4. In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, nitrogen oxide), in the case of condensed water, sulfuric acid, nitric acid, acetic acid liquid point is formed, causing chemical corrosion.
Approach:
1. The surface of the decorative stainless steel must be cleaned and scrubbed frequently to remove the deposits and eliminate external factors that cause corrosion.
2, the coastal area should use 316 stainless steel, 316 material can resist seawater corrosion.
3. Some chemical components of stainless steel pipes on the market cannot meet the corresponding national standards and cannot meet the requirements of 304 materials. Therefore, it will also cause rust, which requires the user to carefully select the products of reputable manufacturers. 
Editor in charge: Wang Zhen
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