How many years will 202 stainless steel rust in the open air?

202 stainless steel will rust after three or four years in the open air. 202 stainless steel uses manganese instead of nickel, and has relatively poor corrosion resistance among stainless steels. It is widely used in China as a cheap substitute for the 300 series. Stainless steel is formed on its surface by an extremely thin, strong, fine and stable chromium-rich oxide film protective film. Prevent oxygen atoms from continuing to penetrate and oxidize, thereby gaining anti-rust ability. 202 stainless steel will rust after three or four years in the open air.

Instructions for hot water kettles made of 202 material

202 stainless steel contains nickel 3 to 4, and partially meets the national stainless steel food hygiene requirements. There is no harm if it meets the national food standard requirements, but it is best to choose 304 stainless steel food grade. Because 304 stainless steel food grade is a general steel used in food tableware and kettles, its performance and quality are better than 202 steel. It can also extend the service life of tableware and kettles during use.

Stainless steel thermos cups are not toxic if they are simply used to drink boiled water. Remember to try not to use this cup to make tea or drink milk, soy milk and other substances. If it is 304 or 316 stainless steel, it is not toxic, but if it is 201 or 202 stainless steel, it is harmful to the human body, because 201 and 202 are easy to produce iron oxide, which is rust, if they are in the water environment for a long time, which will cause damage to the human liver. Toxic side effects.