Corrosion Performance of Surfactant for Oil Field Chemistry

Corrosion performance of petroleum sulfonate type surfactant (KPS) and betaine type surfactant (BTS) were evaluated by static weightlessness method, electrochemical test method and surface topography analyses, respectively. Influence of corrosion parameters such as temperature and pH value on the corrosion performance were also investigated. The corrosion mechanism analysis were investigated using Electrochemical Impedance Spectroscopy (EIS) and the corrosion product analysis was further analyzed by X-ray photoelectron Spectroscopy (XPS). Corrosion performance evaluation indicated that KPS and BTS showed certain corrosion inhibition properties on the carbon steel. Moreover, the KPS displayed better corrosion inhibition effect than BTS. Corrosion mechanism research indicated that the corrosion reaction on the surface of carbon steel was mainly controlled by the charge transfer process and the addition of KPS and BTS did not change the original corrosion mechanism. Corrosion products analysis showed iron (Fe), carbon (C), oxygen (O) elements were the main components, which inferred that the corrosion products were main carbonate and rust iron oxide substances.