Article ID Journal Published Year Pages File Type
1469223 Corrosion Science 2013 9 Pages PDF
Abstract

•2-Mercaptobenzimidazole bonds to the Cu surface via N and S atoms.•No cupric species were formed on the copper surface.•Chlorine was not involved, whereas water molecules were involved in the surface layer.•The thickness of the 2-mercaptobenzimidazole surface layer is 1.9 ± 0.5 nm.•Tentative orientations of 2-mercaptobenzimidazole on Cu substrate are presented.

In Part I of this study, the high corrosion inhibition effectiveness of 2-mercaptobenzimidazole (MBIH) in 3 wt.% NaCl solution was unambiguously proven. In Part II, using angle-resolved X-ray photoelectron spectroscopy (XPS), the surface chemical structure and composition of adsorbed MBIH on Cu from the same solution was investigated. It was found that MBIH molecules are directed toward the Cu surface through their N and S atoms. The MBIH layer thickness is 1.9 ± 0.5 nm, as determined from a detailed analysis of the background in the XPS spectra. Tentative MBIH orientations on Cu were suggested based on the XPS measurements.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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