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Smart protective coatings with self-sensing and active corrosion protection dual functionality from pH-sensitive calcium carbonate microcontainers Vrije Universiteit Brussel

Tong Liu, Dawei Zhang, Lingwei Ma, Yao Huang, Xiangping Hao, Herman Terryn, Arjan Mol, Xiaogang Li

Herein, we report the development of a self-sensing and active corrosion protection coating which incorporates pH-sensitive multilayer chitosan/alginate-covered CaCO3 microcontainers containing 1,10-phenanthrolin-5-amine (APhen). The microcontainers can respond to pH variation to release APhen which serves not only as a corrosion indicator but also as an inhibitor. An epoxy coating doped with 5 wt% microcontainers exhibited improved corrosion ...

Corrosion and Corrosion Protection of Additively Manufactured Aluminium Alloys-A Critical Review Vrije Universiteit Brussel

Donovan Verkens

Metal additive manufacturing (MAM), also known as metal 3D printing, is a rapidly growing industry based on the fabrication of complex metal parts with improved functionalities. During MAM, metal parts are produced in a layer by layer fashion using 3D computer-aided design models. The advantages of using this technology include the reduction of materials waste, high efficiency for small production runs, near net shape manufacturing, ease of ...

Effective corrosion protection by eco-friendly self-healing PMMA-cerium oxide coatings Vrije Universiteit Brussel

Samarah V. Harb, Andressa Trentin, Thiago A.C. de Souza, Marina Magnani, Sandra H. Pulcinelli, Celso V. Santilli, Peter Hammer
Metallic alloys are extensively used in many technological applications, however their susceptibility to corrosion causes huge economical losses and can result in failure of critical components. Aiming to obtain environmentally friendly, self-healing and high efficient anticorrosive coatings, organic-inorganic hybrids consisting of poly (methyl methacrylate) (PMMA) covalently bonded to CeO2/Ce2O3 nanoparticles have been synthetized by the ...

Active corrosion protection of various aluminium alloys by lithium-leaching coatings Vrije Universiteit Brussel

Peter Visser, Herman Terryn, Johannes M. C. Mol

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 electrochemical measurements revealed that the lithium carbonate leaching coating provided effective corrosion ...

Development of self-healing coating with capsules containing healing agent for corrosion protection of metal Vrije Universiteit Brussel

Chinami Yamada, Kazuki Anetai, Haruka Okuyama, Minori Sugiura, Sven Pletincx, Hilke Verbruggen, Atsushi Hyono, Makoto Chiba, Iris De Graeve, Herman Terryn, et al.

In a previous study, self-healing polyurethane coatings with microcapsules containing healing agents have been developed for the protection of metal from corrosion. At the initial stage of the development of these coatings, we synthesized the microcapsules containing healing agents by adding organic solvents to inhibit the solidification of the whole capsule. In this study, the structure of the capsules formed with different solvents, such as ...

Mechanism of corrosion protection of hot-dip aluminium-silicon coatings on steel studied by electrochemical depth profiling Vrije Universiteit Brussel

Iris De Graeve, Ine Schoukens, A. Lanzutti, Ana Alvarez Pampliega, L. Fedrizzi, Herman Terryn
The electrochemical behaviour of hot dip aluminium–silicon coatings on steel is studied in relation to the in-depth structure and composition, determined by SEM/EDX and EBSD. Progressive GDOES sputtering was used for electrochemical analysis using a micro-capillary three-electrode microcell in craters positioned in the various sublayers. Additionally, cross-sections were analyzed with SKPFM. Results show that the outer free aluminium layer of ...

PMMA-silica nanocomposite coating: Effective corrosion protection and biocompatibility for a Ti6Al4V alloy Vrije Universiteit Brussel

Samarah V. Harb, Mayara C. Uvida, Andressa Trentin, Anderson O. Lobo, Thomas Webster, Sandra H. Pulcinelli, Celso V. Santilli, Peter Hammer
Ti6Al4V is the mostly applied metallic alloy for orthopedic and dental implants, however, its lack of osseoin- tegration and poor long-term corrosion resistance often leads to a secondary surgical intervention, recovery delay and toxicity to the surrounding tissue. As a potential solution of these issues poly(methyl methacrylate)- silicon dioxide (PMMA-silica) coatings have been applied on a Ti6Al4V alloy to act simultaneously as an an- ...

Structure and properties of epoxy-siloxane-silica nanocomposite coatings for corrosion protection Vrije Universiteit Brussel

R.F.A.O. Torrico, Samarah V. Harb, Andressa Trentin, Mayara C. Uvida, Sandra H. Pulcinelli, Celso V. Santilli, Peter Hammer

Hypothesis The fraction of the silica/siloxane phase is a crucial parameter, which determines the structure and thus the properties of epoxy-siloxane-silica hybrid coatings. A careful adjustment of the colloidal precursor formulation allows tuning the nanostructure towards a highly condensed and cross-linked hybrid nanocomposite, suitable as an efficient anticorrosive coating. Experiments Novel epoxy-siloxane-silica hybrids have been prepared ...