Heat transport through a corroded carbon steel pipe in a double-pipe heat exchanger, with an aerated 0.1 N NaCl solution flowing in the annular space, has been investigated. Experiments under heat transfer turbulent flow conditions were carried out in a Reynolds number range of 5000-15,000, at three bulk temperatures (30, 40, and 50 degrees C), and a heat flux of 15 kW/m(2). Rates of heat transfer were determined by measuring surface temperature, while mass transfer rates (corrosion rates), due to the diffusion-controlled oxygen reduction reaction, were estimated by measuring the limiting current density. Fouling due to corrosion deposits that form on heat transfer surfaces has an asymptotic form. The value of the asymptotic fouling resistance ranged from 2.17 x 10(-4) to 2.54 x 10(-4) m(2) degrees C/W with 200 h of exposure time.