Abstract
A systematic study of pipeline steel (API X65) degradation due to erosion–corrosion containing sand in a CO 2 saturated environment has been carried out. This work focuses on the total material loss, corrosion, erosion and their interactions (synergy) as a function of environmental parameters (temperature, flow velocity and sand content) to enable the critical conditions, which move the damage mechanism from a flow-induced corrosion regime to erosion–corrosion regime, to be determined. The experimental results show that the effect of corrosion in enhancing erosion, often referred to as the synergy, is significant and accounts for a high proportion of the deviation of measured material loss from the prediction derived from established CO 2 corrosion models. Ways forward to improve erosion–corrosion prediction are discussed.
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