Internal corrosion has been one of the primary mechanisms resulting in pipeline failure in oil/gas production. According to Alberta Energy Regulator (AER)'s statistics, of various reasons causing pipeline failures (leaks and ruptures) in Alberta, Canada from 1990 to 2012, there are 54.8% attributing to internal corrosion. Pipeline internal corrosion is a complex process affected by a wide variety of factors, with multiple, interrelated reactions occurring simultaneously. Various models have been developed to predict pipeline corrosion rate in CO2-containing environments. However, the majority of them are empirical, with little or no theoretical background. It is thus difficult to understand the physical meaning of the contained coefficients and to improve the predictive accuracy. At the same time, the predictive accuracy of the mechanistic models proposed is mainly limited by the poor integration of multiple processes existing in the corrosion system.
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