Mass transfer plays an important roll in the corrosion process due to its strong influence on corrosion rate. Using similarities between heat and mass transfer mechanisms, a new mechanistic model is proposed to predict the mass transfer coefficient for upward two-phase flow. The mechanistic model is evaluated by using water-air heat transfer experimental data obtained from the literature. The mechanistic model is also compared with commonly used empirical correlations. In comparison with available correlations the mechanistic model performs very well for vertical annular flow, bubbly flow and slug flow that were considered. The overall model performance is in good agreement with the experimental data.
Keywords: Mass Transfer Coefficient, CO2 Corrosion, Multiphase Flow, Corrosion Modeling