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Title: | Study Of Mercaptobenzimidazoles As Inhibitors For Copper Corrosion: Down to the Molecular Scale | Authors: | NEUPANE, Shova LOSADA-PEREZ, Patricia Tiringer, Ursa Taheri, Peyman DESTA, Derese XIE, Chenyang Crespo, Daniel Mol, Arjan Milosev, Ingrid Kokalj, Anton RENNER, Frank |
Issue Date: | 2021 | Publisher: | ELECTROCHEMICAL SOC INC | Source: | JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 168 (5) ,(Art N° 051504) | Abstract: | The initiation of corrosion can be triggered by defects in the adsorbed layer of organic inhibitors. A detailed knowledge of the intermolecular forces between the inhibitor molecules and the interfacial bonding will be decisive to unravel the mechanisms driving the corrosion initiation. In this work, adsorbed organic layers of 2-mercapto-5-methoxybenzimidazole (SH-BimH-5OMe) and 5-amino-2-mercaptobenzimidazole (SH-BimH-5NH(2)) were compared regarding their performance mitigating copper corrosion. Atomic force microscopy was used to address the stability and intermolecular forces of the self-assembled monolayers, using imaging and force measurement modes. For a film formed by amino-derivative molecules, a gold-coated tip frequently picked up individual molecules (molecular fishing) in force-distance measurements. For layers of the methoxy-derivative, no fishing events were observed, pointing to a constant functional layer. X-ray photoelectron spectroscopy revealed that SH-BimH-5OMe molecules form a stronger bond with the surface and more stable SAM layers on Cu surfaces as compared to SH-BimH-5NH(2) molecules. Results of computational density functional theory modeling and electrochemical corrosion tests are in line with the microscopy and spectroscopy results. In particular, with aid of computational modeling the less ordered structure of the SH-BimH-5NH(2) monolayer is attributed to dual bonding ability of SH-BimH-5NH(2) that can adsorb with either S or NH2 groups. | Notes: | Renner, FU (corresponding author), Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium.; Renner, FU (corresponding author), IMOMEC, IMEC Div, B-3590 Diepenbeek, Belgium. frank.renner@uhasselt.be |
Other: | Renner, FU (corresponding author), Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium ; IMOMEC, IMEC Div, B-3590 Diepenbeek, Belgium. frank.renner@uhasselt.be | Document URI: | http://hdl.handle.net/1942/34213 | ISSN: | 0013-4651 | e-ISSN: | 1945-7111 | DOI: | 10.1149/1945-7111/abf9c3 | ISI #: | WOS:000649125000001 | Rights: | 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BYNC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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Neupane_2021_J._Electrochem._Soc._168_051504.pdf | Published version | 2.03 MB | Adobe PDF | View/Open |
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