Abstract

Steel pipeline in the oil and gas industry is subject to complex stress-strain due to soil movement along the pipes and internal pressure. The induced longitudinal strains due to soil movement along the pipe and the induced elasto-plastic local strain distribution are shown to impact the pipeline corrosion. In this work, we study the effect of defect geometry and density along the pipe on the local stress-strain distribution and subsequent local corrosion activity. Small strain von Mises yielding criteria is used and corrosion potential, anodic current density, and cathodic current density are characterized and used for this study by looking at the center to edge ratio.

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