The effect of sulfide (S2–) ions on the corrosion behavior of an austenitic steel (Uranus B6) in phosphoric acid (H3PO4) solutions was examined. The critical concentration at which the effect of S2– ions became perceptible was determined. Aggressive effects of the ions increased with increases in temperature and oxygen content. Results showed S2– ions modified the cathodic and anodic processes.

Subject
Materials, Ions, Sulfur compounds, Anodic polarization curves, Dissolution, Ion concentrations, Passivation, Oxygen, Sulfides, Corrosion mechanisms, Alloys, Corrosion potential, Passivity
Keywords:
austenitic stainless steel, phosphoric acid, sulfide, Uranus B6
NACE International
1993
You do not currently have access to this content.