Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/35521
Title: A model study on controlling dealloying corrosion attack by lateral modification of surfactant inhibitors
Authors: NEUPANE, Shova 
RIVAS RIVAS, Nicolas 
LOSADA-PEREZ, Patricia 
D'HAEN, Jan 
Noei, H
Keller, TF
Stierle, A
Rudolph, M
Terfort, A
Bertran, O
Crespo, D
Kokalj, A
RENNER, Frank 
Issue Date: 2021
Publisher: SPRINGER NATURE
Source: NPJ materials degradation, 5 (1) (Art N° 29)
Abstract: Detrimental corrosion is an ever-concerning challenge for metals and alloys. One possible remedy is to apply organic corrosion inhibitors. Despite progress in molecular assembly and inhibitor research, better mechanistic insight on the molecular level is needed. Here we report on the behavior of well-defined artificial molecular interfaces created by micro-contact printing of thiol-inhibitor molecules and subsequent backfilling. The obtained heterogeneity and defects trigger localized dealloying-corrosion of well-defined Cu3Au surfaces. The stability of applied inhibitor molecules depends on alloy surface morphology and on intermolecular forces of the molecular layers. On extended terraces, dealloying preferentially starts at the boundary between areas composed of the two different chain-length inhibitor molecules. Inside of the areas hardly any nucleation of initial pits is visible. Step density strongly influences the morphology of the dealloying attack, while film heterogeneity avoids cracking and controls molecular-scale corrosion attack. The presented surface-science approach, moreover, will ultimately allow to verify the acting mechanisms of inhibitor-cocktails to develop recipes to stabilize metallic alloy surfaces.
Document URI: http://hdl.handle.net/1942/35521
e-ISSN: 2397-2106
DOI: 10.1038/s41529-021-00169-2
ISI #: 000658539900001
Rights: The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Category: A1
Type: Journal Contribution
Validations: ecoom 2022
Appears in Collections:Research publications

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