Role of NaCl, CO2, and H2S on Electrochemical Behavior of 304 Austenitic Stainless Steel in Simulated Oil Industry Environment

The electrochemical behavior of 304 austenitic stainless steel (304ASS) was studied by different methods such as potentiodynamic polarization, EIS, SEM, and Raman spectroscopy. Potentiodynamic polarization data suggest that ASS could be more susceptible to corrosion due the presence H2S. coexistence H2S Cl?-type ionic species in lead a decrease resistance compared H2S-free condition. It is seen CO2 helps form passive layer on metallic surface, which eventually decreases its rate. spectroscopy analysis shows developed under condition consists FeCO3, FeS2, Fe2O3, Fe(OH)2, etc. SEM images further confirm elemental S? Cl? can infiltrate film cause deteriorate.