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Chiter F, Costa D, Pébère N, Marcus P, Lacaze-Dufaure C. Insight at the atomic scale of corrosion inhibition: DFT study of 8-hydroxyquinoline on oxidized aluminum surfaces. Phys Chem Chem Phys 2023; 25:4284-4296. [PMID: 36688480 DOI: 10.1039/d2cp04626a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
8-Hydroxyquinoline (8-HQ) is a promising organic molecule for the corrosion protection of aluminum and its alloys in the replacement of chromate salts. On the aluminum surface, the presence of an oxide layer naturally formed can influence the inhibition efficiency which depends on molecule-surface interactions. In the present study, we performed quantum chemical calculations on native 8-HQ, tautomer and 8-Q (deprotonated, H-abstracted or radical) molecules, adsorbed on an oxidized aluminum surface (γ-Al2O3(111)/Al(111)). All species have the ability to interact strongly with the oxidized aluminum surface and can form stable and dense organic films. The bonding strength of different species of 8-HQ on oxidized aluminum surfaces is more favorable for 8-Q and tautomer species than for the native 8-HQ molecule. On the surface, the native 8-HQ molecule is physisorbed, forming H-bonds, in contrast to the tautomer and 8-Q species that show the predominance of chemisorption modes, involving both H-bonds and covalent bonds at the molecule/substrate interface. The dispersion energy significantly contributes to the adsorption mechanism and increases with increasing molecular surface coverage, due to attractive molecule-molecule interactions. Regardless of surface coverage and considered reaction mechanisms, the 8-Q species is able to enhance the stability of all aluminum sites, and thus to slow down the anodic reaction. In contrast, the native molecule and the tautomeric form have no significant effect or even weakened the stability of aluminum surface atoms.
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Affiliation(s)
- Fatah Chiter
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET 4, allée Emile Monso, BP 44362, 31030 Toulouse Cedex 4, France. .,PSL University, CNRS - Chimie ParisTech, Institut de Recherche de Chimie Paris/Physical Chemistry of Surfaces Group, 11 rue Pierre et Marie Curie, 75005 Paris, France.
| | - Dominique Costa
- PSL University, CNRS - Chimie ParisTech, Institut de Recherche de Chimie Paris/Physical Chemistry of Surfaces Group, 11 rue Pierre et Marie Curie, 75005 Paris, France.
| | - Nadine Pébère
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET 4, allée Emile Monso, BP 44362, 31030 Toulouse Cedex 4, France.
| | - Philippe Marcus
- PSL University, CNRS - Chimie ParisTech, Institut de Recherche de Chimie Paris/Physical Chemistry of Surfaces Group, 11 rue Pierre et Marie Curie, 75005 Paris, France.
| | - Corinne Lacaze-Dufaure
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET 4, allée Emile Monso, BP 44362, 31030 Toulouse Cedex 4, France.
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Thomas A, Khan TS, Gupta P. Density functional theory based indicators to predict the corrosion inhibition potentials of ceramic oxides in harsh corrosive media. Phys Chem Chem Phys 2023; 25:2537-2545. [PMID: 36602192 DOI: 10.1039/d2cp05474d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Coating metal surfaces with ceramic oxides is an experimentally established technique to curb the corrosion of metals. Herein, we used periodic spin-polarized density functional theory (DFT) to study the ceramic oxides Al2O3, TiO2, HfO2 and ZrO2 for their corrosion-inhibition potentials under different harsh corrosive conditions. The adsorption of corrosive atoms on ceramic oxide surfaces is analyzed using DFT-computed indicators such as binding energies, Bader charges, projected density of states (pDOS), and geometric considerations. Adsorption is carried out on the energetically most favorable sites on the metal oxide slabs. Our DFT calculations predict the experimentally observed trends of the ceramic oxides reported in the literature in a chlorine-rich (saline) medium, which was ZrO2 ∼ HfO2 > TiO2 > Al2O3. The computational model is then applied to test the performance of the ceramic oxides as protective layers in sulfur-rich and oxidizing harsh environments. Such a comprehensive DFT-based comparative analysis to predict the corrosion-inhibition potential of ceramic oxides is established for the first time to the best of our knowledge. This easy-to-use computational approach can be widely utilized to gain first-hand information on the anti-corrosion potentials of ceramic oxides and alloys without creating different corrosive conditions experimentally.
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Affiliation(s)
- Anson Thomas
- Computational Catalysis Center, Department of Chemistry, Indian Institute of Technology, Roorkee, Uttarakhand - 247667, India.
| | - Tuhin S Khan
- Light Stock Processing Division, CSIR-Indian Institute of Petroleum, Dehradun, Uttarakhand, 248005, India
| | - Puneet Gupta
- Computational Catalysis Center, Department of Chemistry, Indian Institute of Technology, Roorkee, Uttarakhand - 247667, India.
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Bulteau Y, Lepetit C, Lacaze-Dufaure C. Topological Analysis of Hydroxyquinoline Derivatives Interacting with Aluminum Cations or with an Al(111) Surface. Inorg Chem 2020; 59:17916-17928. [PMID: 33342215 DOI: 10.1021/acs.inorgchem.0c01972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of hydroxyquinoline derivatives (native molecules (Hq) and modified species (HqX, X = Br, SO3H, or SO3-)) is investigated either (i) with aluminum cations for the formation of chelates or (ii) with aluminum surfaces for their adsorption properties, in the framework of the dispersion-corrected Density Functional Theory (DFT-D). It is shown that the substituent X has no influence on the complexation to the aluminum cation of the deprotonated active form, i.e., the one exhibiting a phenolate moiety and referred to as q- for the native Hq and qXn- (n = 1 or 2) for its derivatives. The formation energies of the Alq3 and Al(qX)3 complexes, taking values of -60.87 ± 3.10 eV in vacuum and -24.30 ± 0.29 eV in water, are indicative of a strong chelating affinity of the q- and qXn- (n = 1 or 2) anions for the aluminum cations. ELF and QTAIM topological analyses on these complexes evidence that the bonding of the deprotonated species with the Al3+ ion is ionic with a very weak covalence degree. The para or ortho substituent X of the phenolate moiety of the qXn- (n = 1 or 2) derivatives modifies the electronic structure only locally and thus does not influence their O- or N-coordinating properties. The adsorption properties of the latter on an Al(111) surface have also been studied within periodic DFT-D calculations. The adsorbed species are strongly interacting with the Al(111) surface, as shown by the value of the adsorption energy of -3.69 ± 0.21 eV for the most stable geometries. Various adsorption modes of the q- and qXn- (n = 1 or 2) derivatives are characterized on the Al surface, depending on stabilizing or destabilizing interactions with the substituents X. On the basis of QTAIM descriptors, the bonding of the hydroxyquinoline species on the aluminum surface is characterized as ionic with a weak covalent character.
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Affiliation(s)
- Yann Bulteau
- CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET 4 allée Emile Monso - BP44362, 31030 Toulouse cedex, France
| | - Christine Lepetit
- LCC-CNRS, Université de Toulouse, CNRS, UPS, F-31077 Toulouse, France
| | - Corinne Lacaze-Dufaure
- CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET 4 allée Emile Monso - BP44362, 31030 Toulouse cedex, France
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Bulteau Y, Tarrat N, Pébère N, Lacaze-Dufaure C. 8-Hydroxyquinoline complexes (Alq3) on Al(111): atomic scale structure, energetics and charge distribution. NEW J CHEM 2020. [DOI: 10.1039/d0nj02824j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
8-Hydroxyquinoline (8Hq) is known to efficiently inhibit the corrosion of aluminium by forming metal–organic layers (8Hq forms complexes with aluminium atoms).
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Affiliation(s)
- Yann Bulteau
- CIRIMAT
- Université de Toulouse
- CNRS
- INP-ENSIACET
- Toulouse cedex 31030
| | | | - Nadine Pébère
- CIRIMAT
- Université de Toulouse
- CNRS
- INP-ENSIACET
- Toulouse cedex 31030
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