Inhibited erosion-corrosion of low carbon steel material (UNS G10180) was investigated in a CO2 saturated oil-brine-sand flow. Experimental data for erosion, corrosion, and erosion-corrosion (E/C) were collected using a 3-cell erosion-corrosion flow loop that allows all three components to be measured simultaneously. Erosion, corrosion, and erosion-corrosion as well as inhibited corrosion and inhibited erosion-corrosion are measured at 40% water cut. Comparing 40% and 100% water cut data: the addition of oil was found to lower both erosion and corrosion rates for the conditions considered. The presence of sand particles has been shown to reduce the performance of corrosion inhibitor and increase metal loss rate due to corrosion. For the conditions considered in this paper, the presence of sand in systems where iron carbide precipitation was taking place increased inhibitor effectiveness and decreased metal loss due to corrosion. Experimental results indicate that the interaction between oil and imidazoline-based inhibitor lead to the formation of iron carbide precipitates on the steel surface that reduced the inhibitor effectiveness.

Subject
Water, Inhibitor performance, Sand, Corrosion rate, Metal surfaces, Scale inhibitors, Iron, Metal loss, Corrosion inhibitors, Erosion, Erosion corrosion, Linear polarization resistance, Oil
Keywords:
Low Carbon Steel, CO2 Corrosion, Inhibited Corrosion, Oil-Brine-Sand Flow, Inhibitor Mechanisms, 3-Cell Erosion-Corrosion Flow Loop, erosion, corrosion, erosion-corrosion data
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2016
Association for Materials Protection and Performance (AMPP)
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