Prediction of CO2 corrosion is required for material selection and determination of the required corrosion allowance. Several models giving different results for the same input parameters are available and can be used. No international guidelines or standards exist for corrosion prediction. The NORSOK standard M-506 is used by the Norwegian operators and authorities for prediction of CO2 corrosion. This paper describes limitations and guidance for use of the model in different conditions and for different systems. All predictions are associated with very large uncertainties and he trend in the oil industry is a shift in focus from development of prediction models to more focus on effective use of inhibitors.
Keywords: corrosion modeling, carbon dioxide, carbon steel