Ammonium pyrrolidine dithiocarbamate adsorption on copper surface in neutral chloride media

Wafaa Qafsaoui (1) , Martin W. Kendig (2) , Suzanne Joiret (3) , Hubert Perrot (3) , Hisasi Takenouti (3)

1 Laboratoire de l'Eau et de l'Environnement
2 Kending Research Associates LLC
3 LISE - Laboratoire Interfaces et Systèmes Electrochimiques

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 Cu I-PDTC complex.

Mots clés: copper; polarization; EIS; Raman spectroscopy; XPS; neutral inhibition

Domaines: Chimie; Autre

Wafaa Qafsaoui, Martin W. Kendig, Suzanne Joiret, Hubert Perrot, Hisasi Takenouti. Ammonium pyrrolidine dithiocarbamate adsorption on copper surface in neutral chloride media. Corrosion Science, 2016, 106, pp.96-107. ⟨10.1016/j.corsci.2016.01.029⟩. ⟨hal-01297862⟩