The anodic behavior of both pure iron and nitrided iron has been studied in chloride-containing aqueous solutions at neutral and acidic pH values. The structure of the nitride has been characterized by X-ray diffraction. Surface nitrides may modify the anodic kinetics of stainless steel at the stage of pitting initiation by inhibition of the anodic dissolution of iron. Micro-electrode measurements performed in simulated pits have provided supporting evidence.

Subject
Pits, Nitrides, Iron, Anode surfaces, Acidity, Sodium chloride solution, Anodic dissolution, Nitrogen, Pitting, Stainless steel, Nitriding, Potentiodynamic polarization, Samples
Keywords:
iron, localized attack, nitrides, nitrogen, pitting, polarization curve
National Association of Corrosion Engineers
1991
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