A formula that describes the transport of oxygen to the surface of a metal under cathodic polarization in seawater is presented. The relation assumes turbulent flow conditions and a flat plate geometry. As derived in the text the limiting current density (il) for oxygen reduction is given by where D is the diffusion constant of oxygen in water, n is its valence, F is Faraday's constant, Cb is the oxygen concentration in the bulk, Sc is the Schmidt number, Re is the Reynold's number, x is the distance from the leading edge, t is the thickness of the calcareous deposit, and p is the porosity of the deposit. This formula has been confirmed experimentally for the system investigated.
National Association of Corrosion Engineers
1989
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