Article Dans Une Revue Corrosion Science Année : 2022

Effect of O-2 contamination on carbon steel pseudo-passive scales in CO2 aqueous solutions

Résumé

Waters containing CO2 can lead to the formation of a “pseudo passive” protective corrosion product layer on carbon steel, however an oxygen contamination can significantly alter the corrosion behavior. The carbon steel API 5 L X65 specimens were tested in a CO2 saturated solution with small concentrations of O2 (90−270 ppb). Electrochemical techniques, Raman spectroscopy and SEM were used for determining the corrosion product layer properties. Oxygen contamination induces pits that result in a significant increase and instability of the open circuit potential. Removing the oxygen contamination, stops pits propagation and the carbon steel surface regains its “pseudo-passive” behavior.

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hal-03763040 , version 1 (14-11-2022)

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Edoardo Basilico, Sabrina Marcelin, Remy Mingant, Jean Kittel, Marion Fregonese, et al.. Effect of O-2 contamination on carbon steel pseudo-passive scales in CO2 aqueous solutions. Corrosion Science, 2022, 205, pp.110388. ⟨10.1016/j.corsci.2022.110388⟩. ⟨hal-03763040⟩
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