This paper discusses the risks to the integrity of tubing material used in Carbon Capture and Storage (CCS). One risk is the formation of condensed water at the wellhead, which can lead to corrosion. FEM analysis of the waterlcontaining CO2 flux in the well indicated that the risk of corrosion due to condensed water was very low. Another risk is cooling of the tubing by cold CO2 when the temperature of CO2 is drastically decreased by the JoulelThomson effect. A cooling experiment in which cold nitrogen gas was applied to a steel pipe showed that the temperature of the steel did not decrease to the temperature of the cold gas, indicating that the cooled area was limited to the surface of the steel. The Charpy impact test demonstrated that martensitelbased stainless steels have good lowltemperature toughness. Corrosion of the steel pipe at the bottom hole, where it comes into contact with formation water, is also a risk to the material integrity. Corrosion tests of the steels in SO2 and NO2 contaminated conditions showed that not only S25CR but also modified 13CR (Mod. 13CR), 15CR, 17CR steels have good corrosion resistance in terms of the corrosion rate, resistance to localized corrosion and resistance to SCC under the SO2 and NO2 contaminated conditions.