In Situ Early-Stage CO<sub>2</sub> Corrosion Scale Study with 2D Synchrotron SAXS-WAXS

In this study we have investigated the nucleation mechanism of ‘sweet’, CO<sub>2</sub> corrosion scale in situ using synchrotron scattering under industrially relevant conditions (CO<sub>2</sub> saturated brine, ultra-low oxygen (8-32 ppb), 80<sup>o</sup>C, pH 6.8, open-circuit-potential (OCP)). Simultaneous small and wide-angle X-Ray Scattering (SAXS-WAXS) measurement allows the phase and state of the nucleating corrosion scale to be characterised as a function of both immersion time and location with respect to the metal/solution interface. The results indicate that a precursor amorphous phase is formed prior to the emergence of a crystalline iron carbonate scale.

Publication Details

Journal
Research Explorer (The University of Manchester)
Published
2025-08-20
Primary Topic
Corrosion Behavior and Inhibition
Type
article
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article

In Situ Early-Stage CO2 Corrosion Scale Study with 2D Synchrotron SAXS-WAXS

Research Explorer (The University of Manchester)
Corrosion Behavior and Inhibition
article

In Situ Early-Stage CO2 Corrosion Scale Study with 2D Synchrotron SAXS-WAXS

article en

Abstract

In this study we have investigated the nucleation mechanism of ‘sweet’, CO<sub>2</sub> corrosion scale in situ using synchrotron scattering under industrially relevant conditions (CO<sub>2</sub> saturated brine, ultra-low oxygen (8-32 ppb), 80<sup>o</sup>C, pH 6.8, open-circuit-potential (OCP)). Simultaneous small and wide-angle X-Ray Scattering (SAXS-WAXS) measurement allows the phase and state of the nucleating corrosion scale to be characterised as a function of both immersion time and location with respect to the metal/solution interface. The results indicate that a precursor amorphous phase is formed prior to the emergence of a crystalline iron carbonate scale.

Research Explorer (The University of Manchester)
Openalex Percentile: Top 51%
Corrosion Behavior and Inhibition
Open Access PDFOpenAlex
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In Situ Early-Stage CO<sub>2</sub> Corrosion Scale Study with 2D Synchrotron SAXS-WAXS · Research Explorer (The University of Manchester) (2025) | TGRS Research Map | TGRS