Ammonium pyrrolidine dithiocarbamate adsorption on copper surface in neutral chloride media
By Qafsaoui, W.; Kendig, M. W.; Joiret, S.; Perrot, H.; Takenouti, H.
Published in Corrosion Science
2016
Abstract
Abstract Adsorption of ammonium pyrrolidine dithiocarbamate (PDTC) on copper surface in 0.2 and 30 g L?1 NaCl media was investigated by different electrochemical methods and surface analyses. The results from electrochemical measurements showed that {PDTC} adsorbs rapidly on copper surface and revealed a marked effect of mixed inhibition. Surface analyses confirm the adsorption of {PDTC} on copper and the formation of a Cu-PDTC complex through the S atoms of PDTC. At high concentrations {PDTC} prevents oxides and cuprous chloride formation. {XPS} results showed that {PDTC} bonds with cuprous species indicating the formation of CuI-PDTC complex.