Modeling of uniform CO2 corrosion of mild steel in gas transportation systems: A review

•Progress in the mechanistic models for aqueous CO2 corrosion of mild steel.•Review of the underlying physicochemical processes in CO2 corrosion.•Detailed discussion of the mechanisms of the electrochemical reactions.•Mechanistic models shown to be most flexible and adaptable.•Mechanistic models can be extended to cover complex corrosion scenarios.

The state of the art with regards the mechanistic understanding of uniform carbon dioxide corrosion of mild steel is reviewed and the corresponding mathematical models are presented. The existing predictive models are categorized into three groups, termed: empirical/semi-empirical, elementary mechanistic, and comprehensive mechanistic. With emphasis on mechanistic models, selected key publications are reviewed and the limits and advantages of each group of models are discussed. Furthermore, the ability of the existing models to be extended and account for more complex corrosion scenarios is discussed.