Photoelectrochemical Analysis of Passive Film Modification by Molybdenum addition in Martensitic Stainless Steels

Abstract

This study investigates the corrosion resistance of stainless steel used in oil and gas wells exposed to corrosive gases such as CO₂ and H₂S. It focuses on the enhancement of corrosion resistance by adding molybdenum （Mo） to 13％Cr steel. The research examines how Mo influences the formation of passive films in HS^－ environments. The effects of Mo alloying vary depending on the presence of HS^－, impacting both the inner oxide layer and the outer sulfide layer, which exhibit p-type semiconductor properties.