Abstract
Electrochemical impedance spectroscopy was used to investigate the adsorption of several surface active substances at the surface of copper sulfides and the influence of that adsorption on the reaction of exchange of copper ions between crystal lattice of the sulfide and the solution of copper (II) ions. Simultaneously the influence of several possible inhibitors on the leaching rate of non-stoichiometric copper sulfide was investigated. Among all investigate compounds the strongest inhibiting effect showed sodium oleate. However that compound does not adsorb at the surface of copper sulfide, and the inhibition is due to the precipitation of the insoluble copper oleate at the surface of the sulfide.
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