Kinetics of the oxidation of stainless steel in hot and concentrated nitric acid in the passive and transpassive domains

Elsa Tcharkhtchi-Gillard (1) , Marie Benoit (2, 1) , P. Clavier (1) , B. Gwinner (1) , F. Miserque (3) , Vincent Vivier (2)

1 LECNA - Laboratoire d'Etude de la Corrosion Non Aqueuse
2 LISE - Laboratoire Interfaces et Systèmes Electrochimiques
3 LECA - Laboratoire d'Etude de la Corrosion Aqueuse

Oxidation of 304L stainless steel was studied in 4 mol/L nitric acid solution at 100°C over a wide potential domain. For different potentials, long-term chronoamperometry experiments coupled with mass loss measurements were performed until steady-state was reached to characterize the corrosion kinetics of the passive and transpassive domains. With EIS and XPS measurements, the passive domain was characterized by the formation of a thin film, the thickness of which was potential dependent.

Keywords: Stainless steel; Potentiostatic; XPS; Acid corrosion; Passive film; Transpassivity

Domains: Chemical Sciences; Other

Elsa Tcharkhtchi-Gillard, Marie Benoit, P. Clavier, B. Gwinner, F. Miserque, et al.. Kinetics of the oxidation of stainless steel in hot and concentrated nitric acid in the passive and transpassive domains. Corrosion Science, 2016, 107, pp.182-192. ⟨10.1016/j.corsci.2016.02.031⟩. ⟨hal-01297900⟩