Stainless steel is a type of steel that is resistant to weak corrosive substances like air, steam, and water. It is also resistant to chemical substances like acids, alkalis, and salts. This type of steel is commonly known as stainless steel. On the other hand, there is another type of steel that is resistant to chemical substances but not necessarily to weak corrosive substances. This type of steel is called acid-resistant steel. The corrosion resistance of stainless steel depends on the specific alloying elements present in the steel.