Journal
CORROSION SCIENCE
Volume 217, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2023.111127
Keywords
CO 2 corrosion; Mechanistic model; Corrosion product scales; Protectiveness; ?CT; Porosity
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A mechanistic model for general CO2 corrosion of carbon steel with protective iron carbonate (FeCO3) scales in a specific temperature and CO2 partial pressure range was developed. The model incorporated mathematical distributions of the thickness and porosity of FeCO3 scales determined by X-ray micro-computed tomography (μCT). The flux profiles of species under the measured scale thickness and porosity were demonstrated, and the coupling effects of thickness and porosity on the protectiveness of the corrosion product scales were analyzed.
A mechanistic model for general CO2 corrosion of carbon steel with protective iron carbonate (FeCO3) scales in the temperature range between 30 -90 degrees C, and CO2 partial pressure 0.5 -3.0 MPa was developed. The mathematical distributions of the thickness and porosity of FeCO3 scales were determined by X-ray micro -computed tomography (mu CT) and incorporated into the model. The flux profiles of species under the mu CT measured scale thickness and porosity were demonstrated. Moreover, the coupling effects of thickness and porosity on the protectiveness of the corrosion product scales were analysed and the effects of pore distribution were revealed.
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