Superposition of diffusion and chemical reaction controlled limiting currents - Application to Corrosion

It was observed experimentally that a chemical reaction limiting current can be affected by flow. In the present study a new more general expression than the one found in literature was derived for the superposition of the diffusion and chemical reaction controlled limiting currents. It was found that their interaction in the case of CO2 corrosion is significant at temperatures lower than 40 deg C and velocities higher than 1 m/s when the mass transfer layer is of the similar thickness as the reaction layer.