General stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel generally has corrosion resistance. The term "stainless steel" does not simply refer to a single type of stainless steel but denotes over a hundred industrial stainless steels. Each type of stainless steel developed performs well in its specific application field. The key to success is first to determine the purpose, and then to identify the correct steel type. The steel types related to architectural and construction applications are usually only six. They all contain 17-22% chromium, with better grades also containing nickel. Adding molybdenum can further...EnhanceAtmospheric corrosivity, particularly resistance to chloride-containing atmosphere corrosion.
Stainless steel is a shorthand for acid-resistant steel, referring to steel grades that resist corrosion from air, steam, water, and other mild corrosive media, or steel with inherent corrosion resistance. In contrast, steel that withstands chemical corrosion from agents like acids, alkalis, and salts is called acid-resistant steel. Due to their differing chemical compositions, the corrosion resistance of the two types varies; common stainless steel is generally not resistant to chemical media corrosion, whereas acid-resistant steel typically possesses corrosion resistance.