EFFECTS OF CATIONS ON CO2 INDUCED CORROSION PROCESS OF P110 STEEL IN HIGH TEMPRATURE AND HIGH PRESSURE WATERS
阳离子对P110钢高温高压CO2腐蚀反应过程的影响

The effects of cations on the CO_2 induced corrosion process of P110 steel in stimulated agueous media of oil field at high temperatares and high pressurs were studied with mass loss,components analytical methods,electrochemical impedance spectroscopy (EIS) and polarization curves.The results showed that along with the reaction,the corrosion rate decreased slowly due to the presence of cations.The cations affected not only the anodic process,but also the cathodic process by way of forming corrosion scale.Whether the cation existed or not,EIS had different shapes in the progress of forming scale which can be fitted with different parameters by the same corrosion time.