1. The content of alloying elements. Generally speaking, steel containing 10.5% chromium is not easy to rust. The higher the content of chromium and nickel, the better the corrosion resistance. For example, the content of nickel in 304 material is 8-10%, and the content of chromium is 18-20%. Such stainless steel will not rust in general.
2. The smelting process of the production enterprise will also affect the corrosion resistance of the indoor stainless steel garbage can. No matter in alloy element control, impurity removal, and billet cooling temperature control, the large indoor stainless steel garbage can plant with good smelting technology, advanced equipment, and advanced technology can be guaranteed, so the product quality is stable and reliable, the internal quality is good, and it is not easy to rust. On the contrary, some small steel plants are backward in equipment and technology. In the smelting process, impurities cannot be removed, and the products will inevitably rust.
3. The external environment, dry and well-ventilated climate, is not easy to rust. And the air humidity is big, continuous rainy weather or the environment area with high acid and alkali in the air is easy to rust. 304 indoor stainless steel trash can will rust if the surrounding environment is too poor.
Stainless steel dustbin adheres to stainless steel dustbin or does not rust due to the interaction between its alloy elements and the environment. The presence of a stable film prevents rated corrosion by acting as a barrier to oxygen and water from entering the underlying metal surface. Due to the simple and tight structure of the film, even a small number of atomic layers can reduce the corrosion rate to a very low level. Without the help of modern instruments, the film is much thinner than the wavelength of light, which is hard to see. Thus, although steel is corroded at the atomic level, it looks like a stainless steel bin.
It has been known for many years (about the 1980s) that adding chromium and nickel to steel (nickel is not necessary but chromium is necessary) will make steel rust-free (that is, stainless steel bins). Chromium in steel forms a very thin layer of oxide, which can prevent iron from rusting. A similar mechanism applies to aluminum. When aluminum is exposed in air and water, a thin, invisible oxide coating is formed to avoid further corrosion. Rust is a process in which iron is oxidized to a mixture of iron oxide and hydroxide in the presence of water.
On the contrary, ordinary cheap steel reacts with oxygen from water to form a relatively unstable iron oxide/hydroxide film, which grows continuously with time and is exposed to water and air. As a result, the film, also known as rust, reaches a thickness that can be observed very quickly after exposure to water and air.
In short, stainless steel indoor waste bins generally do not rust because they have the activity to protect themselves from further corrosion by forming a layer of forced corrosion products. (other important metals, such as titanium and aluminum, also depend on the corrosion resistance of the passivation film.) Because of its durability and beauty, stainless steel is used in a variety of fields, from cutlery to bank vault to the kitchen sink.