Electrochemical Impedance Spectroscopy (EIS) Analysis of Film Formation in CO2 Corrosion

Corrosion is defined as the deterioration of material, usually metal, by a chemical or electro-chemical reaction with its environment. In oil and gas industry, CO2 corrosion is one of the recognized problems particularly in production, transportation facilities and the material selection process. In the application of carbon steel, it has become a main concern because of its high corrosion rate and the formation of protective iron carbonate (FeCO3) film layers. Current models often over-predict CO2 corrosion rates for wet gas and oil transport systems. One of the main reasons for this is the fact that the formation
of corrosion product scales is not properly taken into account.