Influence of TiO2 pigment particles on chromate ion transport in epoxy films

Małgorzata Kopeć; Brenda D. Rossenaar; Kees van Leerdam; Arne Janssen; Antony N. Davies; Stuart B. Lyon; Peter Visser; Simon R. Gibbon

doi:10.1038/s41529-021-00156-7

Influence of TiO₂ pigment particles on chromate ion transport in epoxy films

Małgorzata Kopeć^*, Brenda D. Rossenaar, Kees van Leerdam, Arne Janssen, Antony N. Davies, Stuart B. Lyon, Peter Visser, Simon R. Gibbon

^*Corresponding author for this work

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Abstract

Transport of active species (i.e., ions) leaching from pigment particles incorporated in a polymer matrix is the main mechanism behind the anticorrosive performance of protective coatings. Understanding this mechanism is necessary for the effective design of the systems utilizing pigments less toxic than the most efficient chromate salts. It was demonstrated that anticorrosive pigment particles can themselves facilitate the transport of active species via the pathways formed after pigment leaching from a coating. It was also suggested that other paint components, e.g., certain additives, pigments, and fillers can be involved in the formation of transport pathways. Investigation of the possible influence of inert pigment (TiO₂) on creating the pathways for chromate ion transport in polymer coatings was the primary objective of this work. In an experiment mimicking the transport of pigment species (i.e., chromate ions), a model epoxy coating containing particles of a single pigment (TiO₂) was exposed to a chromate solution (aqueous, or with the addition of acetone as a polymer swelling agent). It was shown that the chromate ions can be transported in the epoxy film preferentially via the TiO₂ particles/polymer matrix interface.

Original language	English
Article number	9
Number of pages	8
Journal	npj Materials Degradation
Volume	5
Issue number	1
Early online date	5 Mar 2021
DOIs	https://doi.org/10.1038/s41529-021-00156-7
Publication status	Published - 1 Dec 2021

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title = "Influence of TiO2 pigment particles on chromate ion transport in epoxy films",

abstract = "Transport of active species (i.e., ions) leaching from pigment particles incorporated in a polymer matrix is the main mechanism behind the anticorrosive performance of protective coatings. Understanding this mechanism is necessary for the effective design of the systems utilizing pigments less toxic than the most efficient chromate salts. It was demonstrated that anticorrosive pigment particles can themselves facilitate the transport of active species via the pathways formed after pigment leaching from a coating. It was also suggested that other paint components, e.g., certain additives, pigments, and fillers can be involved in the formation of transport pathways. Investigation of the possible influence of inert pigment (TiO2) on creating the pathways for chromate ion transport in polymer coatings was the primary objective of this work. In an experiment mimicking the transport of pigment species (i.e., chromate ions), a model epoxy coating containing particles of a single pigment (TiO2) was exposed to a chromate solution (aqueous, or with the addition of acetone as a polymer swelling agent). It was shown that the chromate ions can be transported in the epoxy film preferentially via the TiO2 particles/polymer matrix interface.",

author = "Ma{\l}gorzata Kope{\'c} and Rossenaar, {Brenda D.} and {van Leerdam}, Kees and Arne Janssen and Davies, {Antony N.} and Lyon, {Stuart B.} and Peter Visser and Gibbon, {Simon R.}",

note = "Funding Information: Members of the ECG-MAS and ECG-MMT from Nouryon are kindly acknowledged for their contribution to the analytical work related to this project. We would like to thank Lennaert Klerk for the contribution to the project. This work was supported by the European Union{\textquoteright}s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 706908. Publisher Copyright: {\textcopyright} 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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AU - Kopeć, Małgorzata

AU - Rossenaar, Brenda D.

AU - van Leerdam, Kees

AU - Janssen, Arne

AU - Davies, Antony N.

AU - Lyon, Stuart B.

AU - Visser, Peter

AU - Gibbon, Simon R.

N1 - Funding Information: Members of the ECG-MAS and ECG-MMT from Nouryon are kindly acknowledged for their contribution to the analytical work related to this project. We would like to thank Lennaert Klerk for the contribution to the project. This work was supported by the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 706908. Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/12/1

Y1 - 2021/12/1

N2 - Transport of active species (i.e., ions) leaching from pigment particles incorporated in a polymer matrix is the main mechanism behind the anticorrosive performance of protective coatings. Understanding this mechanism is necessary for the effective design of the systems utilizing pigments less toxic than the most efficient chromate salts. It was demonstrated that anticorrosive pigment particles can themselves facilitate the transport of active species via the pathways formed after pigment leaching from a coating. It was also suggested that other paint components, e.g., certain additives, pigments, and fillers can be involved in the formation of transport pathways. Investigation of the possible influence of inert pigment (TiO2) on creating the pathways for chromate ion transport in polymer coatings was the primary objective of this work. In an experiment mimicking the transport of pigment species (i.e., chromate ions), a model epoxy coating containing particles of a single pigment (TiO2) was exposed to a chromate solution (aqueous, or with the addition of acetone as a polymer swelling agent). It was shown that the chromate ions can be transported in the epoxy film preferentially via the TiO2 particles/polymer matrix interface.

AB - Transport of active species (i.e., ions) leaching from pigment particles incorporated in a polymer matrix is the main mechanism behind the anticorrosive performance of protective coatings. Understanding this mechanism is necessary for the effective design of the systems utilizing pigments less toxic than the most efficient chromate salts. It was demonstrated that anticorrosive pigment particles can themselves facilitate the transport of active species via the pathways formed after pigment leaching from a coating. It was also suggested that other paint components, e.g., certain additives, pigments, and fillers can be involved in the formation of transport pathways. Investigation of the possible influence of inert pigment (TiO2) on creating the pathways for chromate ion transport in polymer coatings was the primary objective of this work. In an experiment mimicking the transport of pigment species (i.e., chromate ions), a model epoxy coating containing particles of a single pigment (TiO2) was exposed to a chromate solution (aqueous, or with the addition of acetone as a polymer swelling agent). It was shown that the chromate ions can be transported in the epoxy film preferentially via the TiO2 particles/polymer matrix interface.

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Influence of TiO2 pigment particles on chromate ion transport in epoxy films

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Influence of TiO₂ pigment particles on chromate ion transport in epoxy films