Concentration Cells and Aqueous Corrosion^⋆

This paper describes improved technique for continuous recording of maximum current output of concentration cells and for obtaining corrosion rates of cell electrodes over short periods. Generally, where a dissolved oxygen concentration cell competes with another, the dissolved oxygen cell takes precedence and is the current determinating cell. Rust film on steel increases activity of local or physically separated dissolved oxygen cells. Cell action can be calculated by an equation developed from Fick’s law of diffusion. 3.6.2