Experimental Simulation of Sweet TLC for Aged Internally Coated Pipelines - CANCELLED (C2026-00299)
CANCELLED
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Top of the line corrosion (TLC) in sour environments presents significant challenges for the oil and gas industry. While extensive work has been published in literature to detail the mechanisms involved in TLC, there are still many gaps that requires further research to fully understand this complex phenomenon. This paper aims to elucidate some of these gaps including the complex interactions between H2S and steel, and the effect of H2S on internally coated gas pipelines. The sour environment in gas pipelines was replicated through the decomposition of Na2S2O3 into H2S at the steel surface. Electrochemical measurements, such as potential over time and LPR, were utilized to evaluate the effect of H2S on the corrosion mechanism. This paper also evaluates the protective performance and failure modes of internal coatings under sour TLC conditions. This work provides critical insights into the mechanism of sour TLC and coating performance, offering important information to support the development of a predictive framework for corrosion risk assessment. The outcome will support the development of pipelines management strategies tailored to sour environments, ensuring integrity and operational safety.
