The debate on sequestration of CO2 has renewed the interest for corrosion in liquid/supercritical CO2. Experience from the utilization of CO 2 for enhanced oil recovery (EOR), shows that there are few problems as long as the fluid is pure and the water content is controlled. There is a lack of quantitative data, but as a guideline, it is said that carbon steel can be used as long as the fluid is dry, while wet systems require stainless qualities. Our measurements and some earlier studies, indicate that the
corrosion rate of carbon steel in wet CO2 is substantial, but it does not increase linearly with CO2 fugacity, and it even seems that there is a maximum in the corrosion rate at moderate pressures.