Electrochemical Method to Measure the Copper Ionic Diffusivity in a Copper Sulfide Scale

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Abstract
Copper sulfides have been grown on a copper anode from an acidic solution saturated with under a constant current. A theoretical model for the scale growth has been derived for steady‐state conditions. From the set of experimental data, the cuprous ionic diffusivity of chalcocite and digenite in the scale have been calculated in the range of temperature from 30° to 73°C. The measured diffusion coefficient of cuprous ion in low chalcocite was found to be and in low digenite The calculation of the activation entropy for diffusion in both phases is attempted.

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