Will 304 stainless steel not rust?

As a stainless steel with certain corrosion resistance, is it sure not to rust?

It is not absolutely impossible to rust, if it will rust under special circumstances. 304 thin-walled stainless steel pipe is made of 304 food hygiene grade steel strip. 304 stainless steel is a nationally recognized food hygiene grade material, and the products made of it have certain corrosion resistance. Thin-walled stainless steel pipes and pipe fittings have a thin and firm chromium-rich oxide film on their surface, which can effectively avoid the penetration of oxygen atoms, optimize again, and obtain the ability to resist rust. In this way, as long as the oxide film of 304 stainless steel is destroyed, rust will appear. So in the end what circumstances will cause this phenomenon, the following are common situations encountered.

1. If there are certain chemical elements or metal particles in the environment where the thin-walled stainless steel pipes and fittings are used, they will connect with the condensed water in the pipes to form a micro battery, which will damage the oxide film of the thin-walled stainless steel and cause electrochemical corrosion.

2. 304 stainless steel dinner plates, spoons and other products used in daily life, after being loaded with vegetables and noodle soup, if there is oxygen in the water, if they are not used for a long time, they will form organic acids, which will continuously erode the wall of the plate and cause rust.

3. Another situation is that during decoration, various materials with chemical substances used are easy to adhere to the surface without protective measures for the pipeline, causing local corrosion.

4. In a specific area, there are many sulfides and carbon oxides in the atmosphere. When encountering low temperature weather, it is easy to encounter condensed water, produce sulfuric acid, nitric acid, etc., and easily cause chemical corrosion.

Therefore, in daily life and work, everyone should also pay attention to the environment in which stainless steel is used (special environments can use 304L with lower carbon content, or even 316 and 316L), and pay attention to daily maintenance and maintenance.