Abstract
A detailed theoretical treatment is given of the application of mass transfer theory to the corrosion of iron by flowing sodium in non-isothermal loop systems. Comparison between theory and data reported in the literature for corrosion in the hot isothermal section of a loop, enables values of the mass transfer coefficient and the concentration driving force to be determined separately, and it is shown that corrosion is probably diffusion controlled. However, both the magnitude of the concentration driving force and the oxygen effect are anomalous if the solubility of iron in sodium is that recommended in the literature. It is shown theoretically that the presence of particles in the sodium cannot remove these anomalies. Using much lower values of solubility, obtained in a recent determination by Fleitman and Isaacs, it is shown by computer simulation that excellent agreement between theory and data is obtained and that corrosion is consistent with diffusion control.
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