Stainless steel is short for stainless acid-resistant steel. Weak corrosive media such as air, steam, water or stainless steel are called stainless steel, while chemical corrosive media such as acid, alkali and salt are called acid-resistant steel.

 

Because of the difference in chemical composition between them, their corrosion resistance is different. Common stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel is generally stainless. The term "stainless steel" refers not only to one kind of stainless steel, but also to more than one hundred industrial stainless steels. Each stainless steel developed has good properties in its specific application fields. The key to success is first to understand the use, and then to determine the correct steel grade. There are usually only six types of steel related to the application of building structures. They all contain 17-22% chromium and nickel in better steel grades. Addition of molybdenum can further improve atmospheric corrosion, especially resistance to chloride-containing atmospheric corrosion.

 

Stainless steel refers to steel which is resistant to weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt, also known as stainless steel. In practical application, steel resistant to weak corrosion medium is often called stainless steel, while steel resistant to chemical corrosion medium is called acid-resistant steel. Because of the difference in chemical composition, the former is not necessarily resistant to chemical medium corrosion, while the latter is generally stainless. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.