COMPARISON OF DYNAMIC BEHAVIOR OF THE ANODIC-DISSOLUTION OF COPPER INAQUEOUS CHLORIDE AND BROMIDE SOLUTIONS

Differences in the dynamic behaviour of the anodic dissolution of copp er in aqueous NaCl and NaBr solutions containing SCN- ions were studie d. In a neutral solution, addition of small amounts of NaBr to relativ ely concentrated NaCl solutions modifies oscillation amplitude, freque ncy and mean current density. While the mean value of the anodic curre nt density is essentially the same in 0.5 mol dm(-3) NaCl and 0.5 mol dm(-3) NaBr electrolytes containing 0.5 mol dm(-3) sulfuric acid, fluc tuation patterns are different. The experimental results are interpret ed via Fractional Brownian Motion theory and analyzed by the principle s of chemical equilibria. Copyright (C) 1996. Elsevier Science Ltd.