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Mopon, M. (author), Mol, J.M.C. (author), Garcia, Santiago J. (author)Understanding how late an inhibitor can be released once corrosion initiated without compromising corrosion protection may help in developing more efficient anticorrosion coatings. We explored this idea through time-controlled Ce(NO<sub>3</sub>)<sub>3</sub> availability to AA2024-T3 immersed in 0.05 M NaCl. Ce(NO<sub>3</sub>)<sub>3</sub> was...journal article 2024
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Wu, Wentao (author), Chu, Liangyong (author), Garcia, Santiago J. (author), van der Zwaag, S. (author), Li, Ming (author), Shen, Liming (author), Bao, Ningzhong (author)In this paper, graphene oxide (GO) modified microcapsules have been developed for use in self-healing Cardanol-based epoxy anti-corrosion coatings on steel substrates. The microcapsules had a polymethyl methacrylate (PMMA) shell, covered with aminated GO flakes and contained either of the two complementary healing agents mixed with nanosized...journal article 2023
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Zhao, J. (author), Santoso, A. (author), Garcia, Santiago J. (author)The interaction of 2,5-dimercapto-1,3,4-thiadiazole (DMTD) with the AA2024-T3 local microstructure (S-phase, secondary phases and matrix) as function of the NaCl concentration is studied. The inhibiting power and the local interaction of DMTD with the metal were studied by in–situ opto-electrochemistry, XPS and Raman spectroscopy. The...journal article 2023
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Montano, V. (author), Urban, Marek W. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)Autonomous through-thickness scratch repair (healing) in coatings requires scratch closure and interfacial molecular sealing. Although qualitative aspects of the first stage of self-healing have been addressed, quantitative description enabling the control over the healing process need further understanding. In this work the polymer-architecture...journal article 2022
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Denissen, P.J. (author), Homborg, A.M. (author), Garcia, Santiago J. (author)In this work a diffusion-driven inhibitor transport model is used to help in the design of inhibitor-loaded carriers for anticorrosive primers. The work focuses on inhibitor release at damaged locations of different dimensions exposed to electrolyte and is validated experimentally. The damage dimensions are first simulated to determine the...journal article 2022
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Homborg, A.M. (author), Olgiati, M. (author), Denissen, P.J. (author), Garcia, Santiago J. (author)This work investigates an integrated analysis of in-situ optical data and time-frequency information from electrochemical potential noise (EPN) data to study the effectiveness and durability of an anodic and cathodic corrosion inhibitor. Two different corrosion inhibiting species, cerium(III) (Ce(III)) and phytic acid (PHA), are tested on...journal article 2022
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Nijemeisland, M. (author), Meteleva-Fischer, Y. (author), Garcia, Santiago J. (author)The most widely accepted test for bond durability analysis in aerospace metal-bonded structures is the bondline corrosion test introduced in the late 90s. Little progress has been made however on non-destructive testing methods that allow determining the bond quality after years of use. Here, a non-destructive method based on dielectric...journal article 2022
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Ritzen, L. (author), Montano, V. (author), Garcia, Santiago J. (author)The use of self-healing (SH) polymers to make 3D-printed polymeric parts offers the po-tential to increase the quality of 3D-printed parts and to increase their durability and damage toler-ance due to their (on-demand) dynamic nature. Nevertheless, 3D-printing of such dynamic poly-mers is not a straightforward process due to their polymer...journal article 2021
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Olgiati, M. (author), Denissen, P.J. (author), Garcia, Santiago J. (author)A hyphenated optical-electrochemical technique and image analysis protocol is used to quantify global and local (intermetallic) corrosion process and kinetics. Our findings reveal an early stage (< 60 s) composition-dependent hierarchical local activation of all IMs that can be attributed to IM dealloying. This is followed by local...journal article 2021
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Rossi, E. (author), Zhang, Hongzhi (author), Garcia, Santiago J. (author), Bijleveld, J.C. (author), Nijland, Timo G. (author), Copuroglu, Oguzhan (author), Polder, R.B. (author), Šavija, B. (author)The elastic modulus of corrosion product (E<sub>cp</sub>) has been reported with significant variations in the literature. This study aims to investigate the E<sub>cp</sub> of naturally-generated chloride-induced corrosion products formed in different concrete mixes. Microstructural characterization was conducted through nano-indentation,...journal article 2021
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Montano, V. (author), Vogel, Wouter (author), Smits, Angela (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)The effects of the soft block fraction and H-bond state in thermoplastic polyurethanes on autonomous entropy-driven scratch closure and barrier restoration are studied. To this aim, comparable polyurethanes with different segmentation states are applied as organic coatings on plain carbon steel plates, scratched under very well-controlled...journal article 2021
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Montano, V. (author), Senardi, M. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)The use of rheology and terminal flow relaxation times to predict healing behavior at long healing times is by now quite well accepted. In this work we go one step further and explore the use of macro-rheology (in particular the stored work of deformation) to predict the early stage interfacial healing properties (fracture resistance) of a...journal article 2020
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Denissen, P.J. (author), Shkirskiy, Viacheslav (author), Volovitch, Polina (author), Garcia, Santiago J. (author)Earlier studies on cerium-loaded naturally occurring silica microparticles (i.e., diatomaceous earth) demonstrated the potential to efficiently protect small scratches in epoxy-coated AA2024-T3 panels during relatively short immersion times. The current work investigates the potential of such inhibitor-loaded microparticles to protect wide...journal article 2020
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Denissen, P.J. (author), Garcia, Santiago J. (author)An in-situ hyphenated optical and electrochemical method for the real-time study of corrosion and corrosion inhibition processes is presented and validated for the case of AA2024-T3 exposed to two NaCl concentrations and six inhibitors. During testing, 5 μm resolution optical images of the exposed surface are obtained in parallel to...journal article 2019
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Spiesz, E.M. (author), Schmieden, D.T. (author), Grande, Antonio M. (author), Liang, K. (author), Schwiedrzik, Jakob (author), Natalio, Filipe (author), Michler, Johann (author), Garcia, Santiago J. (author), Aubin-Tam, M.E. (author), Meyer, Anne S. (author)The impressive mechanical properties of natural composites, such as nacre, arise from their multiscale hierarchical structures, which span from nano- to macroscale and lead to effective energy dissipation. While some synthetic bioinspired materials have achieved the toughness of natural nacre, current production methods are complex and...journal article 2019
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Montano, V. (author), Wempe, M.M.B. (author), Does, S.M.H. (author), Bijleveld, J.C. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)In this work, we propose the use of regular branching of polyurethanes as a way to regulate chain dynamics and govern crystallization in highly dense hydrogen-bonded systems. As a result, robust and healable polyurethanes can be obtained. To this end, we synthesized a range of aliphatic propane diol derivatives with alkyl branches ranging...journal article 2019
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Denissen, P.J. (author), Homborg, A.M. (author), Garcia, Santiago J. (author)Real-time optical analysis is used to improve the interpretation of electrochemical noise signals (EN). The concept is presented for the case of AA2024-T3 under immersion in various NaCl concentrations. An in-house developed optical-electrochemical technique allowed for high spatiotemporal resolution and was used to visualize and quantify...journal article 2019
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Montano, V. (author), Picken, S.J. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)Starting from experimental macro-rheological data, we develop a fitting protocol that succeeded in the separation of the overlapping relaxation phenomena in the dissipative regime for a set of intrinsic healing polymers healing most effectively near their glass transition temperature T <sub>g</sub> . To allow for a proper deconvolution, the...journal article 2019
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Susa, A. (author), Mordvinkin, Anton (author), Saalwächter, Kay (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)We present a systematic study of the role of the aromatic dianhydride structure on the self-healing behavior of dimer diamine-based polyimides. By means of solid-state NMR and rheology, we studied the molecular and microscale dynamics of four polyimides comprising the same aliphatic branched diamine yet with variable dianhydride rigidities...journal article 2018
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Saini, Vimal (author), von Tapavicza, Max (author), Eloo, Christina (author), Braesch, Katrin (author), Wack, Holger (author), Nellesen, Anke (author), Schmidt, Annette M. (author), Garcia, Santiago J. (author)Superabsorbent polymers (SAPs) are well known for their ability to absorb and hold high water amounts accompanied by a high volume expansion. In this work we show the benefits of this underlying property of SAPs to induce underwater crack closure with subsequent barrier restoration in damaged protective coatings. For the proof of concept,...journal article 2018
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