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Open AccessArticle

Poly(Phenylene Methylene): A Multifunctional Material for Thermally Stable, Hydrophobic, Fluorescent, Corrosion-Protective Coatings

1
Department of Materials, ETH Zurich, 8093 Zürich, Switzerland
2
Department of Chemistry, University of Milan, 20133 Milan, Italy
3
Department of Environmental Science and Policy, University of Milan, 20133 Milan, Italy
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(8), 274; https://doi.org/10.3390/coatings8080274
Received: 29 June 2018 / Revised: 20 July 2018 / Accepted: 25 July 2018 / Published: 7 August 2018
Poly(phenylene methylene) (PPM) is a thermally stable, hydrophobic, fluorescent hydrocarbon polymer. PPM has been proposed earlier to be useful as a coating material but this polymer was isolated in relevant molar masses only recently, and in large quantities. Accordingly, the preparation of coatings based on PPM and their behavior was explored in this study, with the example of the metal alloy AA2024 as a common substrate for corrosion tests. Coatings free of bubbles and cracks were obtained by hot pressing and application of the following steps: Coating on AA2024 with a layer of polybenzylsiloxane to improve the adhesion between PPM and the metal surface, the addition of polybenzylsiloxane to PPM in order to enhance the viscosity of the molten PPM, and the addition of benzyl butyl phthalate as a plasticizer. Electrochemical corrosion tests showed good protection of the metal surface towards a NaCl solution, thanks to a passive-like behavior in a wide potential window and a very low current density. Remarkably, the PPM coating also exhibited self-healing towards localized attacks, which inhibits the propagation of corrosion. View Full-Text
Keywords: poly(phenylene methylene), aluminum alloy; AA2024; coatings by hot pressing; additives; fluorescence; corrosion protection poly(phenylene methylene), aluminum alloy; AA2024; coatings by hot pressing; additives; fluorescence; corrosion protection
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MDPI and ACS Style

D’Elia, M.F.; Braendle, A.; Schweizer, T.B.; Ortenzi, M.A.; Trasatti, S.P.M.; Niederberger, M.; Caseri, W. Poly(Phenylene Methylene): A Multifunctional Material for Thermally Stable, Hydrophobic, Fluorescent, Corrosion-Protective Coatings. Coatings 2018, 8, 274.

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