The first X-ray photoelectron spectroscopy surface analysis of 4-methyl-2-phenyl-imidazole adsorbed on copper

Abstract

The focus of this article is a detailed surface analytical study by X-ray photoelectron spectroscopy (XPS) of 4-methyl-2-phenyl-imidazole (MePhI) adsorbed from 3 wt.% NaCl solution on a Cu surface. It is shown for the first time that MePhI is a Cu corrosion inhibitor in chloride solution after short-term (1-100h) and long-term immersion periods (180 days), and that MePhI is an anodic-type corrosion inhibitor. Surface analysis was first performed by examination of the Cu surface layer chemical structure, followed by surface layer thickness analysis according to the Tougaard method. It is shown that a very thin layer is formed. Next, a detailed angle-resolved XPS analysis was performed to study the manner of MePhI bonding on the copper surface. It is claimed that the MePhI molecule connects to the surface via C and N atoms. A flat orientation of MePhI molecules, parallel to the copper surface, is suggested.

Electrochemical and Surface Analysis of 2-Phenylimidazole Adsorbed on Copper from Chloride Solution

“…However, the methyl group also does not interfere with the adsorption process, as MePhI was previously found to be an effective corrosion inhibitor [6,13].…”

“…The contact angle measurements and the ATR-FTIR analysis were performed on copper samples after 1 h of immersion. After this time it is possible to analyze only the first few layers of the adsorbed inhibitor, avoiding in this way the formation of crystallites of the inhibitor on the copper surface, which do not influence the corrosion inhibition action of the adsorbed compound [13].…”

“…Several other azole compounds have been previously reported as effective corrosion inhibitors for copper in chloride solutions. Previously, we demonstrated for the first time that 4-methyl-2-phenyl-imidazole (MePhI) [6,13] and 2-aminobenzimidazole [5] are effective corrosion inhibitors for copper in 3 wt.% NaCl solution. Since MePhI is an effective corrosion inhibitor, a question that arises is whether the methyl group in that compound is crucial for the adsorption process (compare the structures in Figure 1).…”

The first electrochemical and surface analysis of 2-aminobenzimidazole as a corrosion inhibitor for copper in chloride solution

“…These crystallites usually have no influence on the corrosion inhibition action of the adsorbed compound. 55 A significantly higher immersion time, 31 days, was chosen for the topography and morphology measurements of the samples immersed in 3 wt% NaCl solution with and without the addition of 2-ABI in order to induce the corrosion action of the medium used.…”

Reusability of SPE and Sb-Mmodified SPE Sensors for Trace Pb(II) Determination

“…Based on the measured 3D-profiles, mean surface roughness, S a , was calculated. S a is based on general surface roughness; the higher the S a value, the rougher the surface is [34]. AFM measurements were performed on three different sensors (before use, bare SPE, and SbFSPE) and one of these measurements is presented.…”