ELECTROCHEMICAL DISSOLUTION OF NONHOMOGEN EOUS DEPOSITS OF COPPER ON ALUMINUM

A mathematical model is derived to simulate the electrodissolution cur ves for a metallic deposit constituted of very small spherical particl es (2 mum average diameter). The model takes in account the randomly d iameter distribution by dividing the total amount of metal in several classes (a class is made of spherical metallic particles of identical diameter). The total current is the sum of the individual contribution of each class. An illustration is presented which describes the elect rodissolution of a copper electrodeposit on aluminium. The electrodepo sit is thin enough to be constituted of well separated metallic sphere s. The electrodissolution is performed in presence of triethylpentamin e.