Session: Corrosion in Carbon Capture, Transportation, and Utilization and Storage (CCTUS) (Part I of III)
From Lab to Model: Tackling Corrosion Challenges in Carbon Capture and Storage (CCS) (C2026-00099)
Wednesday, March 18, 2026
10:00 AM - 10:30 AM Central
Location: 342 DE
Earn .5 PDH
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Ludovic GALLIOT, Camille Durieux, HERVE MARCHEBOIS, Sara RAURICH
As CCS technologies gain momentum, corrosion emerges as a critical challenge - particularly the phenomenon of acid dropout, where reactive impurities in CO₂ streams (e.g., H₂O, O₂, H₂S, SO₂, NO₂) form aggressive mineral acids like sulfuric and nitric acid. When these acids exceed their solubility limits, they condense into droplets, posing a severe corrosion risk to infrastructure.
This paper introduces a structured methodology to assess acid dropout-related corrosion risks, integrating laboratory findings into a predictive modelling framework. The proposed model aims to: Outline the key steps in corrosion risk assessment Identify critical parameters influencing acid formation and corrosion rates Estimate corrosion rates under varying CCS conditions Highlight knowledge gaps and areas for model improvement
A parametric study is presented, using weight loss measurements to evaluate the corrosion behavior of synthetic acid phases under CCS-relevant conditions. Variables include temperature, acid concentration, CO₂ pressure, gas composition, volume/surface ratio, exposure time, and material type. Results are analyzed using a three-tier classification system to rank the influence of each parameter on corrosion severity.
Finally, the study underscores the need for further research in thermodynamics, reaction kinetics, droplet characterization, flow dynamics, and robust corrosion data to enhance model accuracy and reduce conservatism.
