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 30gL?1 NaCl was investigated at several concentrations between 0.1 and 10mM 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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