A large number of apparent resistivity and induced-polarization (IP) model measurements have been performed in laboratories during the past decades using metal conductors immersed in an electrolyte solution. Guptasarma (1983) showed that the surface polarization that occurs on an electrolyte-metal boundary has, at laboratory scale, a marked influence on apparent resistivity results, if the frequency of the transmitted current is lower than a specific limit and the frequency is dependent upon the dimensions and the physical and electro-chemical parameters of the model.

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