In situ early-stage CO2 corrosion scale study with 2D synchrotron SAXS-WAXS

DOI: 10.1016/j.corsci.2025.113267

Authors: M. Hassan Sk (University of Cambridge) , S. M. Clarke (University of Cambridge) , M. Woolley (University of Cambridge) , A. Osudare (The University of Manchester) , S. Agrawal (University of Cambridge) , N. Sharifi (University of Cambridge) , D. Eberl-Craske (The University of Manchester) , R. Lindsay (The University of Manchester) , M. T. L. Casford (The University of Manchester) , A. Smith (Diamond Light Source) , N. Terrill (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Corrosion Science , VOL 257

State: Published (Approved)
Published: December 2025
Diamond Proposal Number(s): 23699 , 28693 , 32669

Abstract: In this study we have investigated the nucleation mechanism of ‘sweet’, CO2 corrosion scale in situ using synchrotron scattering under industrially relevant conditions (CO2 saturated brine, ultra-low oxygen (8–32 ppb), 80 °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.

Subject Areas: Materials, Chemistry


Instruments: I22-Small angle scattering & Diffraction

Added On: 27/08/2025 10:09

Discipline Tags:

Physical Chemistry Chemistry Corrosion Materials Science

Technical Tags:

Scattering Small Angle X-ray Scattering (SAXS) Wide Angle X-ray Scattering (WAXS)