An erosion-corrosion study on pipeline material degradation in sand-containing and CO2 saturated environments has been carried out. The total material loss, corrosion, erosion and their interactions (often referred to as synergy) have been assessed for pipeline steel X65 and 22Cr duplex stainless steel in various environmental conditions (temperature, flow velocity and sand content). The experimental results show the 22Cr duplex stainless steel exhibits a better performance under liquid-solid impingement for all conditions resulting from the better resistance to corrosion related degradation. A comparison between the experimental data and the empirical prediction model developed in this work shows a good correlation.

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