Effects of NO2-ions on localised corrosion of steel in NaHCO3 + NaCl electrolytes

• Published in: Electrochimica acta Vol. 52; no. 27; pp. 7599 - 7606
• Main Authors: REFFASS, M, SABOT, R, JEANNIN, M, BERZIOU, C, REFAIT, Ph
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Oxford Elsevier 10.10.2007
• Subjects: Applied sciences; Corrosion; Corrosion mechanisms; Exact sciences and technology; Metals. Metallurgy; Microprobe; Nitrites; Iron II Compounds; Localized corrosion; Nitrite; Steel; Pitting corrosion; Inorganic anion; Electrolyte; Iron III Compounds; Sodium Hydrogencarbonates; Raman spectrometry; Electrochemical microprobe; scanning vibrating electrode; Sodium Chlorides; Micro-Raman spectroscopy

Pitting corrosion of carbon steel electrodes in 0.1molL-1 NaHCO3+0.02molL-1 NaCl solutions was induced by anodic polarisation. The evolution of the breakdown potential Eb with NO2- concentration was investigated by linear voltammetry. Eb increased from -15+/-5mV/SCE for [NO2-]=0 up to 400+/-50mV/SCE...