Abstract
Electrochemical techniques, X-ray diffraction (XRD), and scanning electron microscopy (SEM) were applied to study the corrosion behaviors of X65 steel in static solution with carbon dioxide (CO 2) at 65°C. The results show that iron carbonate (FeCO 3) deposits on the steel surface as a corrosion product scale. This iron carbonate scale acts as a barrier to CO 2 corrosion, and can reduce the general corrosion rate. The protection ability of the scale is closely related to the scale morphological characteristics.
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