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Article Dans Une Revue Corrosion Science Année : 2023

Differential aeration corrosion of silver in sulfate melts at 900 °C

D. Diomande
  • Fonction : Auteur
S. Mathieu
Pierre-Jean Panteix
M. Siblani
  • Fonction : Auteur
Lionel Aranda
Carine Petitjean
Michel Vilasi

Résumé

The thermodynamic of the Ag/AgSO4 electrode, serving as reference for carrying electrochemical experiences of corrosion in sulfates at 900 °C, was investigated because of the observed limited operating lifetime. Its use led to the total degradation of the ∅1 mm Ag wire in ∼200 h. Half-immersion of Ag wires in sulfates mixes (selected for their acido-basicity) evidenced the homogeneous thinning of the immersed part of the wires and the precipitation of metallic Ag in the salt. The different steps governing the corrosion mechanism were proposed considering that the driving force was the differential aeration of the Ag wire.

Domaines

Matériaux
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Dates et versions

hal-04210400 , version 1 (18-09-2023)

Identifiants

Citer

D. Diomande, S. Mathieu, Pierre-Jean Panteix, M. Siblani, Lionel Aranda, et al.. Differential aeration corrosion of silver in sulfate melts at 900 °C. Corrosion Science, 2023, 224, pp.111504. ⟨10.1016/j.corsci.2023.111504⟩. ⟨hal-04210400⟩
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