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Coupling of electrochemical, electrogravimetric and surface analysis techniques to study dithiocarbamate/bronze interactions in chloride media

By Qafsaoui, W.; Taouil, A. Et; Kendig, M. W.; Cachet, H.; Joiret, S.; Perrot, H.; Takenouti, H.
Published in Corrosion Science 2018

Abstract

Interaction between ammonium pyrrolidinedithiocarbamate (PDTC) and bronze in 30 g L?1 NaCl was investigated at several concentrations between 0.1 and 10 mM by means of various electrochemical and spectroscopic techniques. Electrochemical measurements revealed a fast adsorption process of {PDTC} on Cu and Pb and the formation of a thick insulating and protective film with a high surface coverage. At high concentrations, {PDTC} prevents oxides formation. Surface analyses confirm {PDTC} adsorption on bronze mainly via interaction between sulphur atoms and Cu sites to form CuI-PDTC complex.

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