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Madelat, Negin (author), Wouters, Benny (author), Visser, Peter (author), Jiryaeisharahi, Zahra (author), Marcoen, Kristof (author), Abrahami, S.T. (author), Hubin, Annick (author), Terryn, H.A. (author), Hauffman, Tom (author)
In this work, the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in a series of organic coatings is explored. Using an odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach, the diffusion of ions independent from water take-up is analysed. A higher PVC resulted...
journal article 2024
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Michailidou, E. (author), Visser, P. (author), Mol, J.M.C. (author), Kosari, A. (author), Terryn, H.A. (author), Baert, K. (author), Gonzalez Garcia, Y. (author)
The corrosion inhibiting effect of lithium carbonate has been studied over the pH range relevant for atmospheric corrosion conditions at the polymer/metal interface. It is demonstrated that lithium carbonate offers optimum corrosion protection under moderately alkaline conditions attributed to the formation of a protective layer identified as...
journal article 2023
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Kosari, A. (author), Ahmadi, M. (author), Tichelaar, F.D. (author), Visser, P. (author), Gonzalez Garcia, Y. (author), Zandbergen, H.W. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Cerium-based compounds have been studied for decades as non-toxic candidates for the protection of aerospace aluminium alloys (AAs) like AA2024-T3. However, the complex heterogeneous microstructure of these alloys has hindered a thorough understanding of the subsequent stages of corrosion protection provided by this class of inhibitors. Thus,...
journal article 2021
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Visser, P. (author), Ranade, S. (author), Laird, J. S. (author), Glenn, A. M. (author), Hughes, A. E. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Depletion depths of inorganic components from a scribe edge in a polyurethane primer containing Li<sub>2</sub>CO<sub>3</sub>, MgO, BaSO<sub>4</sub> and TiO<sub>2</sub> beneath a topcoat, were determined using a range of techniques including SEM/EDS and proton induced X-ray and γ-ray emission spectroscopies. SEM of sections cut using an ion...
journal article 2021
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Kosari, A. (author), Tichelaar, F.D. (author), Visser, P. (author), Taheri, P. (author), Zandbergen, H.W. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Lithium salts have been proposed as promising environmentally friendly alternatives to carcinogenic hexavalent chromium-based inhibitors for the corrosion protection of aerospace aluminium alloys (AAs). Incorporated into organic coatings, lithium salts are released at damaged locations to establish a conversion layer in which distinct...
journal article 2021
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Kosari, A. (author), Tichelaar, F.D. (author), Visser, P. (author), Zandbergen, H.W. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Lithium leaching coatings have recently been developed as eco-friendly active corrosion protection technology for aerospace aluminium alloys (AAs) by the formation of a conversion layer at coating defects. While general conversion layer formation characteristics were studied and reported before, here we study the local layer formation process...
journal article 2021
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Kosari, A. (author), Zandbergen, H.W. (author), Tichelaar, F.D. (author), Visser, P. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Liquid-phase transmission electron microscopy (LP-TEM) has provided corrosion scientists with a unique opportunity to directly correlate nanoscopic morphological and compositional evolutions to the corresponding electrochemical response of corroding thin TEM specimens. Electrochemical liquid cell designs are key components of a LP-TEM study...
journal article 2021
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Kosari, A. (author), Visser, P. (author), Tichelaar, F.D. (author), Eswara, S. (author), Audinot, J. N. (author), Wirtz, T. (author), Zandbergen, H.W. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
This work focuses on the cross-sectional characterization of the protective conversion layer formed on AA2024-T3 by lithium-leaching from a polyurethane coating in a corrosive environment. The layer shows a multi-layered arrangement comprising nanoscopic local phases. Transmission electron microscopy (TEM) and complementary high-resolution...
journal article 2020
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Kosari, A. (author), Zandbergen, H.W. (author), Tichelaar, F.D. (author), Visser, P. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Identifying corrosion initiation events in metals and alloys demands techniques that can provide temporal and spatial resolution simultaneously. Transmission electron microscopy (TEM) enables one to obtain microstructural and chemical descriptors of materials at atomic/nanoscopic level and has been used in corrosion studies of many metal...
review 2020
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Kosari, A. (author), Zandbergen, H.W. (author), Tichelaar, F.D. (author), Visser, P. (author), Taheri, P. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Dealloying is involved in materials science responsible for fabrication of nanoscale structures beneficially but for corrosion degradations detrimentally. Detailed understanding related to the latter is critical for designing corrosion-resistance alloys and dedicated inhibition systems. Thus, direct nanoscopic observations of nano-structural...
journal article 2020
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Kosari, A. (author), Tichelaar, F.D. (author), Visser, P. (author), Zandbergen, H.W. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Nanoscopic characterization of heterogeneous intermetallic particles (IMPs) which microstructurally and compositionally evolve during local corrosion is crucial in unravelling the mechanisms and sequence of initial and local corrosion events. Herein, we study site-specific initiation events focused on microscopic constituent intermetallic...
journal article 2020
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Visser, P. (author), Marcoen, K. (author), Trindade, G. F. (author), Abel, M. L. (author), Watts, J. F. (author), Hauffman, T. (author), Mol, J.M.C. (author), Terryn, H.A. (author)
Chemical throwing power, being the distance over which an inhibitor is able to protect a defect effectively, is an important parameter for active protective coatings. This study investigates the chemical throwing power of lithium-based leachable corrosion inhibitors exhibiting different leaching kinetics, from coatings at different inhibitor...
journal article 2019
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Visser, P. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
This study presents the active protective properties of lithium-leaching coatings for a range of aluminium alloys. Coatings with and without lithium carbonate as leachable inhibitor were applied on the aluminium alloys, artificially damaged and exposed to the neutral salt spray. A combined approach of scanning electron microscopy and...
journal article 2019
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Laird, J. S. (author), Visser, P. (author), Ranade, S. (author), Hughes, A.E. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Studies of Li depletion in sections of a Li <sub>2</sub> CO <sub>3</sub> -primer comprising a polyurethane binder, MgO, TiO <sub>2</sub> , BaSO <sub>4</sub> in addition to Li <sub>2</sub> CO <sub>3,</sub> were performed using a combination of particle induced γ-ray and X-ray emission spectroscopies along with SEM/EDS analysis. A mixture of...
journal article 2019
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Visser, P. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Inhibitor leaching, fast, effective and irreversible passivation are essential for active protective coatings to protect aluminium alloys. This study presents the comparison of the active protective properties of lithium carbonate and two organic corrosion inhibitors, benzotriazole and 2-mercaptobenzothiazole, on aluminium alloy 2024-T3 with...
journal article 2018
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Marcoen, Kristof (author), Visser, P (author), Trindade, G. F. (author), Abel, M. L. (author), Watts, J. F. (author), Mol, J.M.C. (author), Terryn, H.A. (author), Hauffman, T. (author)
Organic primer coatings loaded with environmentally harmful Cr(VI) corrosion inhibitive pigments still play an important role in corrosion protection of aluminium alloys for the aerospace industry. A potential “green” alternative coating system has recently been developed, loaded with lithium salt corrosion inhibitors. Under exposure to...
journal article 2018
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Meeusen, M. (author), Visser, P. (author), Fernández Macía, L. (author), Hubin, A. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
In this work, the study of the time-dependent behaviour of lithium carbonate based inhibitor technology for the active corrosion protection of aluminium alloy 2024-T3 is presented. Odd random phase electrochemical impedance spectroscopy (ORP-EIS) is selected as the electrochemical tool to study the corrosion protective properties of a model...
journal article 2018
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Visser, P. (author), Gonzalez Garcia, Y. (author), Mol, J.M.C. (author), Terryn, H.A. (author)
This study focuses on the elucidation of the formation mechanism of passive layers on AA2024-T3 during the exposure to alkaline lithium carbonate solutions in the presence of sodium chloride. Under controlled conditions, in an electrochemical cell, a protective layer was generated comprising an amorphous inner layer and a crystalline outer...
journal article 2018
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Laird, Jamie S. (author), Hughes, Anthony E. (author), Ryan, C.J. (author), Visser, P (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Lithium based inhibitors in aerospace coatings are seen as excellent replacements for their chromium counterparts which are both carcinogenic and heavier. However, Li is generally difficult to detect and following changes in its distribution due to corrosion is impossible with many standard techniques. Combining MeV Particle Induced Gamma and...
journal article 2017
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Visser, P. (author), Meeusen, M. (author), Gonzalez Garcia, Y. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
This work presents the electrochemical evaluation of protective layers generated in a coating defect from lithium-leaching organic coatings on AA2024-T3 aluminum alloys as a function of neutral salt spray exposure time. Electrochemical impedance spectroscopy was used to study the electrochemical properties on a macroscopic scale. An...
journal article 2017
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