EFFECT OF SLUG FLOW ON CO2 CORROSION OF PIPELINE IN OIL AND GAS INDUSTRY

Based on the analysis of hydrodynamic boundary layer and diffusion boundary layer,the effects of slug flow on mass transfer of corrosive species to and of corrosion products from the wall,momentum interchange,electrochemical reaction and corrosion product film were obtained.It is suggested that the non-linear coupling of the characteristics such as the normal stress,shear stress,mass transfer coefficient and electrochemical reaction,has important effect on the CO2 corrosion of pipeline.The key roles of microstructure,mechanical properties,mass transfer of the corrosion product film in the process of corrosion product film’s formation,damage and repair are also clarified.