Mass transfer controlled corrosion of a copper pipe was studied using diffusion-controlled dissolution of a copper tube in acidified potassium dichromate solution. The copper tube is considered as a plug flow and the reservoir through which recirculation takes place as an ideal stirred tank reactor. A model is formulated that enables to estimate the liquid phase mass transfer coefficient using the concentration-time data. With the present experimental data, the Sherwood correlations are also found for different concentrations.