How does the inclusion of molybdenum in stainless steel enhance corrosion resistance?

The inclusion of molybdenum in stainless steel significantly enhances its corrosion resistance, particularly in aggressive environments such as those containing chlorides or acids. Molybdenum works by forming a stable passive oxide layer on the steel's surface, which acts as a barrier against corrosive agents. This element also improves the material's resistance to pitting and crevice corrosion, common issues in marine and chemical processing applications.

Stainless steel alloys with higher molybdenum content, such as 316 and 317 grades, are widely used in industries where durability and longevity are critical. By strengthening the steel's ability to withstand oxidation and chemical attacks, molybdenum ensures superior performance in demanding conditions, making it an essential component in high-quality stainless steel.