Ammonium pyrrolidine dithiocarbamate adsorption on copper surface in neutral chloride media. (May 2016)

• Record Type: Journal Article
• Authors: Qafsaoui, W.; Kendig, M.W.; Joiret, S.; Perrot, H.; Takenouti, H.
• Is Part Of: Corrosion science. Volume 106(2016)
• Page Start: 96
• Page End: 107
• Publication Date: 2016-05
• Subjects: A. Copper -- B. EIS -- B. Polarization -- B. Raman spectroscopy -- B. XPS -- C. Neutral inhibition; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.01.029
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: PDTC inhibits efficiently copper corrosion in chloride media. PDTC is mixed corrosion inhibitor of Cu in chloride media. PDTC forms a chelate complex with cuprous species. PDTC adsorbs on copper surface during immersion in chloride media. PDTC hinders the oxide film formation on copper surface. 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 Cu I –PDTC complex.