Corrosion propagation monitoring using electrochemical noise measurements on carbon steel in hydrogenocarbonated solution containing chloride ions

Chloé Comas (1) , François Huet (2) , Kieu Ngo (2, 3) , Marion Fregonese (1) , Hassane Idrissi (1) , Bernard Normand (1)

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
2 LISE - Laboratoire Interfaces et Systèmes Electrochimiques
3 LRS - Laboratoire de Réactivité de Surface

The propagation of localized corrosion on API 5 L X65 carbon steel in hydrogenocarbonated solution containing chloride ions was monitored during long immersion times by electrochemical noise (EN) measurements in ZRA mode. Monitoring corrosion propagation from the EN amplitude is possible but interpreting the potential and current transients after long immersion times is made difficult by the different corrosion processes (metastable or stable pits, crevices, corrosion products detachment…) occurring simultaneously. The noise impedance at 0.1 Hz, directly derived from the EN measurements, is shown to decrease and stabilize in the same time scale as the coupled potential of the electrodes.

Mots clés: Localized corrosion; carbon steel; open circuit potential; electrochemical noise measurements; noise impedance

Domaines: Chimie; Matériaux

Chloé Comas, François Huet, Kieu Ngo, Marion Fregonese, Hassane Idrissi, et al.. Corrosion propagation monitoring using electrochemical noise measurements on carbon steel in hydrogenocarbonated solution containing chloride ions. Corrosion Science, 2021, 193, pp.109885. ⟨10.1016/j.corsci.2021.109885⟩. ⟨hal-03387864⟩