Results of a study of the kinetics of manganese dioxide leaching from pores in anodes of solid-electrolyte capacitors are presented. It is shown that manganese dioxide present in pores is the most effectively dissolved at room temperature under treatment with dilute solutions of sulfuric and hydrochloric acids to which hydrogen peroxide is added in not-less-than-stoichiometric amounts according to the reactions MnO2 + H2SO4 + H2O2 = MnSO4 + 2H2O + O2→ and MnO2 + 2HCl + H2O2 = MnCl2 + 2H2O + O2→. The initial acid concentration does not exceed 36% for H2SO4 and 18% for HCl.
Russian Journal of Applied Chemistry – Springer Journals
Published: Dec 16, 2012
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