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Materials 2018, 11(6), 893; https://doi.org/10.3390/ma11060893

Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

FNMS, Department of Chemistry, University of Prishtina, Prishtina 10000, Kosovo
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Received: 16 April 2018 / Revised: 14 May 2018 / Accepted: 22 May 2018 / Published: 26 May 2018
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Abstract

The corrosion of two different metals, niobium and tantalum, in aqueous sulfuric acid solution has been studied in the presence and absence of carboxylated graphene oxide. Potentiodynamic measurements indicate that this nanomaterial inhibits corrosion due to its adsorption on the metal surfaces. The adsorbed layer of carboxylated graphene hinders two electrochemical reactions: the oxidation of the metal and the transport of metal ions from the metal to the solution but also hydrogen evolution reaction by acting as a protective barrier. The adsorption behavior at the molecular level of the carboxylated graphene oxide with respect to Nb, NbO, Ta, and TaO (111) surfaces is also investigated using Molecular Dynamic and Monte Carlo calculations. View Full-Text
Keywords: niobium; tantalum; carboxylated graphene oxide; nanomaterials; corrosion inhibition; molecular dynamics; Monte Carlo calculation niobium; tantalum; carboxylated graphene oxide; nanomaterials; corrosion inhibition; molecular dynamics; Monte Carlo calculation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mehmeti, V.; Podvorica, F.I. Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide. Materials 2018, 11, 893.

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