Galvanic effects induced by siderite and cementite surface layers on carbon steel in aqueous CO2 environments - Archive ouverte HAL Access content directly
Journal Articles Corrosion Science Year : 2022

Galvanic effects induced by siderite and cementite surface layers on carbon steel in aqueous CO2 environments

(1) , (2, 3) , (2) , (2) , (1)
1
2
3

Abstract

Siderite (FeCO 3) and cementite (Fe 3 C) layers develop naturally on carbon steel surfaces in aqueous carbon dioxide (CO 2) environments. This study evaluates galvanic corrosion induced by such layers when coupled to bare carbon steel. In CO 2-saturated, 50 • C, pH 5 conditions, the Fe 3 C-filmed carbon steel acted as the net cathode, significantly enhancing bare steel corrosion rates. Galvanic currents induced by the FeCO 3-filmed steel were much lower, with FeCO 3 removed from the surface as Fe 3 C was revealed concomitantly on bare steel. It is proposed that the presence of Fe 3 C amongst the FeCO 3 layer is responsible for galvanic interaction, rather than FeCO 3 itself.
Fichier principal
Vignette du fichier
Galvanic effects induced by siderite and cementite surface layers....pdf (11.02 Mo) Télécharger le fichier
Vignette du fichier
Galvanic-SM.pdf (1.63 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-03909974 , version 1 (21-12-2022)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Joshua Owen, Francois Ropital, Gaurav R. Joshi, Jean Kittel, Richard Barker. Galvanic effects induced by siderite and cementite surface layers on carbon steel in aqueous CO2 environments. Corrosion Science, 2022, 209 (110762), ⟨10.1016/j.corsci.2022.110762⟩. ⟨hal-03909974⟩
0 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More